Date: Thu, 29 May 14 00:15:47 GMT Subject: hep-ph daily 19 new + 9 crosses received by eprepget ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ Send any comments regarding submissions directly to submitter. ------------------------------------------------------------------------------ Archives at http://arxiv.org/ To unsubscribe, e-mail To: hep-ph@arXiv.org, Subject: cancel ------------------------------------------------------------------------------ received by eprepget from Tue 27 May 14 20:00:00 GMT to Wed 28 May 14 20:00:00 GMT ------------------------------------------------------------------------------ \\ arXiv:1405.7040 Date: Tue, 27 May 2014 20:00:12 GMT (719kb,D) Title: A Double Take on New Physics in Double Higgs Production Authors: Chuan-Ren Chen and Ian Low Categories: hep-ph hep-ex Comments: 16 pages, 7 figures \\ Gluon-initiated double Higgs production is the most important channel to extract the Higgs self-coupling at hadron colliders. However, new physics could enter into this channel in several distinctive ways including, but not limited to, the Higgs self-coupling, a modified top Yukawa coupling, and an anomalous Higgs-top quartic coupling. In this work we initiate a study on the interplay of these effects in the kinematic distributions of the Higgs bosons. More specifically, we divide the transverse momentum and the total invariant mass spectra into two bins and use the differential rates in each bin to constrain the magnitude of the aforementioned effects. Significantly improved results could be obtained over those using total cross section alone. However, some degeneracy remains, especially in the determination of the Higgs trilinear coupling. Therefore, an accurate measurement of the Higgs self-coupling in this channel would require precise knowledge of the magnitudes of other new physics effects. We base our analysis on a future 100 TeV proton-proton collider. \\ ( http://arxiv.org/abs/1405.7040 , 719kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7046 Date: Tue, 27 May 2014 20:00:16 GMT (18kb) Title: NNNLO soft-gluon corrections for the top-antitop pair production cross section Authors: Nikolaos Kidonakis Categories: hep-ph Comments: 11 pages, 3 tables, 4 figures \\ I present a calculation of next-to-next-to-next-to-leading-order (NNNLO) soft-gluon corrections for top-antitop pair production in hadronic collisions. Approximate NNNLO (aNNNLO) results are obtained by adding the NNNLO soft-gluon corrections to the complete next-to-next-to-leading-order (NNLO) cross section. Theoretical predictions are shown for the total aNNNLO $t{\bar t}$ cross section at LHC and Tevatron energies. The aNNNLO cross sections are larger but have smaller theoretical uncertainties than at NNLO. \\ ( http://arxiv.org/abs/1405.7046 , 18kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7049 Date: Tue, 27 May 2014 20:00:20 GMT (2123kb,D) Title: Leptophobic Dark Matter at Neutrino Factories Authors: Brian Batell, Patrick deNiverville, David McKeen, Maxim Pospelov, Adam Ritz Categories: hep-ph hep-ex Comments: 15 pages, 8 figures \\ High-luminosity fixed-target neutrino experiments present a new opportunity to search for light sub-GeV dark matter and associated new forces. We analyze the physics reach of these experiments to light leptophobic dark states coupled to the Standard Model via gauging the $U(1)_B$ baryon current. When the baryonic vector is light, and can decay to dark matter, we find that the MiniBooNE experiment in its current beam-dump configuration can extend sensitivity to the baryonic fine structure constant down to $\alpha_B\sim 10^{-6}$. This is significantly below the existing limits over much of the sub-GeV mass range currently inaccessible to direct detection experiments. \\ ( http://arxiv.org/abs/1405.7049 , 2123kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7053 Date: Tue, 27 May 2014 20:08:35 GMT (184kb,D) Title: Searching for non-diagonal Mass varying mechanism in the $\nu_{\mu}$-$\nu_{\tau}$ system Authors: D. R. Gratieri and O. L. G. Peres Categories: hep-ph Comments: 16 pages, 9 figures \\ We use atmospheric neutrino data and MINOS data to constrain the MaVaN (Mass Varying Neutrinos) mechanism. The MaVaN model was largely studied in cosmology scenarios and comes from the coupling of the neutrinos with a neutral scalar depending on the local matter density. For atmospheric neutrinos, this new interaction affects the neutrino propagation inside the Earth, and as consequence, induces modifications in their oscillation pattern. To perform such test for a non-standard oscillation mechanism with a non-diagonal neutrino coupling in the mass basis, we analyze the angular distribution of atmospheric neutrino events as seen by the Super-Kamiokande experiment for the events in the Sub-GeV and multi-GeV range and muon neutrinos (anti-neutrinos) in MINOS experiment. From the combined analysis of these two sets of data we obtain the best fit for $\Delta m^{2}_{32}=2.45 \times 10^{-3}$ eV$^{2}$, $sin^{2}(\theta_{23})=0.42 $ and MaVaN parameter $\alpha_{32}=0.28$ with modest improvement, $\Delta \chi^{2}= 1.8$, over the standard oscillation scenario. The combination of MINOS data and Super-Kamiokande data prefers small values of MaVaN parameter $\alpha_{32} < 0.31 $ at $90 \%$ C. L.. \\ ( http://arxiv.org/abs/1405.7053 , 184kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7079 Date: Tue, 27 May 2014 22:27:45 GMT (209kb,D) Title: Higgs production at NNLOPS Authors: Emanuele Re Categories: hep-ph Comments: 5 pages, 2 figures. Submitted to the proceedings of the 49th Rencontres de Moriond on QCD and High Energy Interactions, March 22-29, 2014, La Thuile \\ We describe the method used to build a simulation of Higgs boson production accurate at next-to-next-to-leading order and matched to a parton shower. The adopted procedure makes use of a combination of the POWHEG and MiNLO methods. We also use results from HNNLO as final input to reach the claimed accuracy. Results for typical observables are shown. \\ ( http://arxiv.org/abs/1405.7079 , 209kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7095 Date: Wed, 28 May 2014 00:39:39 GMT (823kb) Title: Flavor structure of the unpolarized and longitudinally-polarized sea-quark distributions in the nucleon Authors: Masashi Wakamatsu Categories: hep-ph hep-ex nucl-th Comments: LaTeX 48 pages, 19 figures, 2 tables \\ It is now widely recognized that a key to unravel the nonperturbative chiral-dynamics of QCD hidden in the deep-inelastic-scattering observables is the flavor structure of sea-quark distributions in the nucleon. We analyze the flavor structure of the nucleon sea in both of the unpolarized and longitudinally polarized parton distribution functions (PDFs) within a single theoretical framework of the flavor SU(3) chiral quark soliton model (CQSM), which contains only one adjustable parameter $\Delta m_s$, the effective mass difference between the strange and nonstrange quarks. A particular attention is paid to a nontrivial correlation between the flavor asymmetry of the unpolarized and longitudinally polarized sea-quark distributions and also to a possible particle-antiparticle asymmetry of the strange quark distributions in the nucleon. We also investigate the charge-symmetry-violation (CSV) effects in the parton distribution functions exactly within the same theretical framework, which is expected to provide us with valuable information on the relative importance of the asymmetry of the strange and antistrange distributions and the CSV effects in the valence-quark distributions inside the nucleon in the resolution scenario of the so-called NuTeV anomaly in the extraction of the Weinberg angle. \\ ( http://arxiv.org/abs/1405.7095 , 823kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7103 Date: Wed, 28 May 2014 02:29:33 GMT (40kb) Title: $B\to \pi\pi$ decays and effects of the next-to-leading order contributions Authors: Ya-Lan Zhang, Xue-Yan Liu, Ying-Ying Fan, Shan Cheng, and Zhen-Jun Xiao Categories: hep-ph hep-ex Comments: 11 pages, 1 figure \\ In this paper we perform a systematic study for the three $B \to (\pi^+\pi^-,\pi^+\pi^0,\pi^0\pi^0)$ decays in the perturbative QCD (pQCD) factorization approach with the inclusion of all currently known next-to-leading order (NLO) contributions from various sources. We found that (a) for the CP-averaged decay rates $Br(B^0\to \pi^+\pi^-)$ and $Br(B^+\to \pi^+\pi^0)$, the NLO pQCD predictions agree with the data within one standard dviation; (b) for $Br(B^0\to \pi^0\pi^0)$, however, although the NLO contributions can provide a $\sim 100\%$ enhancement to the leading order (LO) result, it is still not large enough to interpret the data; (c) for the CP-violating asymmetries of $B^0\to \pi^+\pi^-$ decay, the central values of the NLO PQCD predictions agree with the data; and (d) we also examined the relative strength of the LO and NLO contributions from different sources. \\ ( http://arxiv.org/abs/1405.7103 , 40kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7154 Date: Wed, 28 May 2014 08:36:49 GMT (315kb,D) Title: 125 GeV Higgs from a chiral-techniquark model Authors: Stefano Di Chiara, Roshan Foadi and Kimmo Tuominen Categories: hep-ph hep-lat Comments: 16 pages, 7 figures \\ We consider the spin-zero spectrum of a strongly coupled gauge theory. In particular, we focus on the dynamical mass of the isosinglet scalar resonance in the presence of a four-fermion interaction external to the gauge dynamics. This is motivated by the extended technicolor framework for dynamical electroweak symmetry breaking. Applying the large-$N$ limit, we sum all the leading-order contributions, and find that the corrections to the mass of the isosinglet scalar resonance can be large, potentially reducing its value from ${\cal O}(1)$ TeV to the observed value of 125 GeV. \\ ( http://arxiv.org/abs/1405.7154 , 315kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7163 Date: Wed, 28 May 2014 08:52:59 GMT (896kb) Title: Invisible decays of low mass Higgs bosons in supersymmetric models Authors: P. N. Pandita, Monalisa Patra Categories: hep-ph Comments: 15 pages, 14 EPS figures \\ The discovery of a 126 GeV Higgs like scalar at the LHC along with the non observation of the supersymmetric particles, has in turn lead to constraining various supersymmetric models through the Higgs data. We here consider the case of both MSSM, as well its extension containing an additional chiral singlet superfield, NMSSM. We concentrate on the case where we identify the second lightest Higgs boson as the 126 GeV state discovered at the CERN LHC and consider the invisible decays of the low mass Higgs bosons in both MSSM and NMSSM. We find that in case of the MSSM with universal boundary conditions at the GUT scale, it is not possible to have light neutralinos leading to the decay channel $H\rightarrow \tilde{\chi}_1^0 \tilde{\chi}_1^0$. The invisible decay mode is allowed in case of certain $SO(10)$ and $E_6$ grand unified models with large representations and nonuniversal gaugino masses at the GUT scale. In case of the NMSSM, for the parameter space considered it is possible to have the invisible decay channel with universal gaugino masses at the GUT scale. We furthermore consider the most general case, with $M_1$ and $M_2$ as independent parameters for both MSSM and NMSSM. We isolate the regions in parameter space in both cases, where the second lightest Higgs boson has a mass of 126 GeV and then concentrate on the invisible decay of Higgs to lighter neutralinos. The other non-standard decay mode of the Higgs is also considered in detail. The invisible Higgs branching ratio being constrained by the LHC results, we find that in this case with the second lightest Higgs being the 126 GeV state, more data from the LHC is required to constrain the neutralino parameter space, compared to the case when the lightest Higgs boson is the 126 GeV state. \\ ( http://arxiv.org/abs/1405.7163 , 896kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7168 Date: Wed, 28 May 2014 09:14:37 GMT (127kb,D) Title: Constraints on Millicharged Neutrinos via Atomic Ionizations with Germanium Detectors at sub-keV Sensitivities Authors: Jiunn-Wei Chen, Hsin-Chang Chi, Hau-Bin Li, C.-P. Liu, Lakhwinder Singh, Henry T. Wong, Chih-Liang Wu, and Chih-Pan Wu Categories: hep-ph hep-ex nucl-th Comments: 4 pages, 3 figures, 1 table \\ With the advent of detectors with sub-keV sensitivities, atomic ionization has been identified as a promising avenue to probe possible neutrino electromagnetic properties. The interaction cross-sections induced by millicharged neutrinos are evaluated with the ab-initio multi-configuration relativistic random-phase approximation. There is significant enhancement at atomic binding energies compared to that when the electrons are taken as free particles. Positive signals would distinctly manifest as peaks at specific energies with known intensity ratios. Selected reactor neutrino data with germanium detectors at analysis threshold as low as 300 eV are studied. No such signatures are observed, and a combined limit on the neutrino charge fraction of $| \numq | < 1.0 \times 10^{-12}$ at 90% confidence level is derived. \\ ( http://arxiv.org/abs/1405.7168 , 127kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7176 Date: Wed, 28 May 2014 09:46:46 GMT (325kb) Title: Electromagnetic and gravitational form factors in simulated QED and Yukawa model Authors: Narinder Kumar and Harleen Dahiya Categories: hep-ph Comments: 11 pages. To appear in Mod. Phys. Lett. A. arXiv admin note: text overlap with arXiv:hep-ph/0009228, arXiv:hep-th/0003082 by other authors \\ The light-cone Fock state representation of composite systems has number of remarkable properties and for systems such as hadrons they have exact representation for angular momentum, energy momentum tensor. We investigate the electromagnetic and gravitational form factors with zero momentum transfer in QED and Yukawa theory. To improve the convergence near the end points of $x$ qualitatively as well as to check the consistency of the model, we differentiate the wavefunction w.r.t. bound state mass. We test the behaviour of the anomalous gravitomagnetic moment, which follows directly from the Lorentz boost properties of the light-cone Fock representation, for the simulated model as well as the Yukawa model. We also discuss the Pauli form factor obtained from the spin-flip matrix element. \\ ( http://arxiv.org/abs/1405.7176 , 325kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7177 Date: Wed, 28 May 2014 10:02:49 GMT (34kb) Title: Masses of constituent quarks confined in open bottom hadrons Authors: V. Borka Jovanovi\'c, D. Borka, P. Jovanovi\'c, J. Milo\v{s}evi\'c, S. R. Ignjatovi\'c Categories: hep-ph Comments: 10 pages, 6 tables, 1 figure. Submitted \\ We apply color-spin and flavor-spin quark-quark interactions to the meson and baryon constituent quarks, and calculate constituent quark masses, as well as the coupling constants of these interactions. The main goal of this manuscript was to determine constituent quark masses from light and open bottom hadron masses, using the fitting method we have developed and clustering of hadron groups. We use color-spin Fermi-Breit (FB) and flavor-spin Glozman-Riska (GR) hyperfine interaction (HFI) to determine constituent quark masses (especially $b$ quark mass). Our improved fitting procedure of constituent quark masses showed that both interactions we studied represent satisfactory approximations in the case of heavy mesons and baryons with $b$ quark, but on average color-spin (Fermi-Breit) hyperfine interaction yields better fits. Our method also shows the way how the constituent quark masses and the strength of the interaction constants appear in different hadron environments. \\ ( http://arxiv.org/abs/1405.7177 , 34kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7213 Date: Wed, 28 May 2014 12:07:17 GMT (34kb,D) Title: Probing the mass degeneracy of particles with different spins Authors: Z.-H. Zhang, G. L\"u, and K.-W. Wei Categories: hep-ph \\ The spin is an important property of a particle. Although it is unlikely to happen, there is still a possibility that two particle with different spins share similar masses. In this paper, we propose a method to probe this kind of mass degeneracy of particles with different spins. We will use the cascade decay $B^+\to X(3872)K^+$, $X(3872)\to D^+D^-$ to explain our method. It can be seen that the possible mass degeneracy of $X(3872)$ can lead interesting behavior in the corresponding cascade decay. \\ ( http://arxiv.org/abs/1405.7213 , 34kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7252 Date: Wed, 28 May 2014 14:21:03 GMT (407kb,D) Title: Transverse-momentum spectra of strange particles produced in Pb+Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV in the chemical non-equilibrium model Authors: Viktor Begun, Wojciech Florkowski, and Maciej Rybczynski Categories: hep-ph nucl-ex nucl-th \\ We analyze the transverse-momentum spectra of strange hadrons produced in Pb+Pb collisions at the collision energy $\sqrt{s_{\rm NN}}=2.76$ TeV. Our approach combines the concept of chemical non-equilibrium with the single-freeze-out scenario. The two ideas are realized in the framework of the Cracow model, whose thermodynamic parameters have been established in earlier studies of the ratios of hadron multiplicities. The geometric parameters of the model are obtained from the fit to the spectra of pions and kaons, only. Using these parameters, we obtain an excellent description of the spectra of protons and the $K_S^0$, $K^*(892)^0$, and $\phi(1020)$ mesons. A satisfactory description is also obtained for the $\Lambda$, $\Xi$ and $\Omega$ hyperons. Further improvement of the hyperon spectra may be achieved if we assume that they are emitted from a smaller, internal part of the system but at the same thermodynamic conditions. Our work not only includes all particle species measured up to now in heavy-ion collisions at the LHC energies but, in addition, discusses the centrality dependence of the particle production. \\ ( http://arxiv.org/abs/1405.7252 , 407kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7275 Date: Wed, 28 May 2014 15:27:48 GMT (272kb,D) Title: Decoherence by wave packet separation and collective neutrino oscillations Authors: Evgeny Akhmedov, Joachim Kopp and Manfred Lindner Categories: hep-ph Comments: LaTeX, 6 pages, 2 pdf figures \\ In dense neutrino backgrounds present in supernovae and in the early Universe, neutrino oscillations may exhibit complex collective phenomena, such as synchronized oscillations, bipolar oscillations and spectral splits and swaps. In this Letter we consider for the first time the effects of decoherence by wave packet separation on these phenomena. We derive the evolution equations that govern neutrino oscillations in a dense medium in the presence of decoherence and consider the evolution of several simple neutrino systems in detail. We show that decoherence may modify the oscillation pattern significantly and lead to qualitatively new effects. In particular, contrary to the no-decoherence case, strong flavor conversion becomes possible even in the case of constant or nearly constant density of the neutrino background. \\ ( http://arxiv.org/abs/1405.7275 , 272kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7291 Date: Wed, 28 May 2014 16:07:28 GMT (510kb,D) Title: Photon polarisation in light-by-light scattering: finite size effects Authors: Victor Dinu, Tom Heinzl, Anton Ilderton, Mattias Marklund, Greger Torgrimsson Categories: hep-ph hep-th physics.optics Comments: 9 pages, 8 figures \\ We derive a simple expression for the photon helicity and polarisation-flip probabilities in arbitrary background fields, in the low energy regime. Taking the background to model a focused laser, we study the impact of pulse shape and collision geometry on the probabilities and on ellipticity signals of vacuum birefringence. We find that models which do not account for pulse duration can overestimate all signals by an order of magnitude. Taking pulse duration into account, the flip probability becomes relatively insensitive to both angular incidence and the fine details of the pulse structure. \\ ( http://arxiv.org/abs/1405.7291 , 510kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7310 Date: Wed, 28 May 2014 17:20:26 GMT (2632kb,D) Title: On propagators and three-point functions in Landau gauge QCD and QCD-like theories Authors: Reinhard Alkofer, Gernot Eichmann, Christian S. Fischer, Markus Hopfer, Milan Vujinovic, Richard Williams, Andreas Windisch Categories: hep-ph Comments: 13 pages, 9 figures; Proceedings of the workshop QCD-TNT-III, ECT* Trento, Sept. 2-6, 2013; references updated Journal-ref: PoS QCD-TNT-III (2014) 003 \\ Recent progress in our studies of propagators and three-point functions in Landau gauge for QCD and QCD-like theories is presented. Special emphasis is put on the properties of the three-gluon vertex and the quark-gluon vertex. The effect of unquenching is investigated. Furthermore, an exploratory study for a large number of light flavours is described, from where clear evidence for the qualitative behaviour of propagators in the so-called conformal window can be extracted. \\ ( http://arxiv.org/abs/1405.7310 , 2632kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7331 Date: Wed, 28 May 2014 18:46:02 GMT (6027kb,D) Title: Extending Higgs Inflation with TeV Scale New Physics Authors: Hong-Jian He, Zhong-Zhi Xianyu Categories: hep-ph astro-ph.CO gr-qc hep-ex Comments: 17pp \\ Higgs inflation is among the most economical and predictive inflation models, although the original Higgs inflation requires tuning the Higgs or top mass away from its current experimental value by $\sim 2\sigma$ deviations, and generally gives a negligible tensor-to-scalar ratio $r \sim 10^{-3}$ (if away from the vicinity of critical point). In this work, we construct a minimal extension of Higgs inflation, by adding only two new weak-singlet particles at TeV scale, a vector-quark $T$ and a real scalar $S$. The presence of singlets $(T, S)$ significantly impact the renormalization group running of the Higgs boson self-coupling. With this, our model provides a wider range of the tensor-to-scalar ratio $r = O(0.1)-O(10^{-3})$, consistent with the favored $r$ values by either BICEP2 or Planck data, while keeping the successful prediction of the spectral index $ n_s \simeq 0.96 $. It further allows the Higgs and top masses to fully fit the collider measurements. We also discuss implications for searching the predicted TeV-scale vector-quark $T$ and scalar $S$ at the LHC and future high energy pp colliders. \\ ( http://arxiv.org/abs/1405.7331 , 6027kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7340 Date: Wed, 28 May 2014 19:18:24 GMT (1146kb,D) Title: Infrared behaviour of propagators and running coupling in the conformal window of QCD Authors: Markus Hopfer, Christian S. Fischer, Reinhard Alkofer Categories: hep-ph Comments: 6 pages, 4 figures, presented at Excited QCD 2014, 2nd - 8th February 2014, Bjelasnica Mountain, Sarajevo, Bosnia-Herzegovina \\ Using the Dyson-Schwinger approach we investigate Landau gauge QCD with a relatively large number of chiral quark flavours. A self-consistent treatment on the propagator level enables us to study unquenching effects via the quark loop diagram in the gluon equation. Above the critical number of fermion flavours the non-perturbative running coupling develops a plateau over a wide momentum range. Correspondingly, the propagators follow a power law behaviour in this momentum range indicating conformal behaviour. Our value $N_f^{crit}=4.5$ is strongly sensitive to the details of the quark-gluon vertex calling for more detailed investigations in future studies. \\ ( http://arxiv.org/abs/1405.7340 , 1146kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:1404.5908 (*cross-listing*) Date: Wed, 23 Apr 2014 17:36:00 GMT (22kb) Date (revised v2): Tue, 27 May 2014 19:11:35 GMT (22kb) Title: Propagator mixing renormalization for Majorana fermions Authors: Bernd A. Kniehl Categories: hep-th hep-ph Comments: 20 pages, accepted for publication in Phys. Rev. D Report-no: DESY 14-007 \\ We consider a mixed system of unstable Majorana fermions in a general parity-nonconserving theory and renormalize its propagator matrix to all orders in the pole scheme, in which the squares of the renormalized masses are identified with the complex pole positions and the wave-function renormalization (WFR) matrices are adjusted in compliance with the Lehmann-Symanzik-Zimmermann reduction formalism. In contrast to the case of unstable Dirac fermions, the WFR matrices of the in and out states are uniquely fixed, while they again bifurcate in the sense that they are no longer related by pseudo-Hermitian conjugation. We present closed analytic expressions for the renormalization constants in terms of the scalar, pseudoscalar, vector, and pseudovector parts of the unrenormalized self-energy matrix, which is computable from the one-particle-irreducible Feynman diagrams of the flavor transitions, as well as their expansions through two loops. In the case of stable Majorana fermions, the well-known one-loop results are recovered. \\ ( http://arxiv.org/abs/1404.5908 , 22kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7044 (*cross-listing*) Date: Tue, 27 May 2014 20:00:15 GMT (608kb,D) Title: Axion Monodromy Inflation on Warped Throats Authors: Sebastian Franco, Daniele Galloni, Ander Retolaza, Angel Uranga Categories: hep-th hep-ph Comments: 35 pages, 17 figures \\ Recent models of axion monodromy inflation in string theory link the inflationary potential and the moduli stabilization potential. Realistic inflationary models require mechanisms to moderately suppress the inflaton mass with respect to the moduli stabilization scale. In this paper we explore the realization of this idea using warped throats, whose redshifted infrared region supports the inflaton mode. The inflaton potential and its monodromy arise from couplings to the fluxes supporting the throat. We provide explicit realizations of such throats in type IIB with NSNS and RR 3-form field strength fluxes, and in type IIA with RR 2-form fluxes. These systems provide simple local models realizing chaotic inflation at scales parametrically suppressed with respect to bulk physics. The construction of the throats is systematically carried out using geometric transitions in systems of D-branes at singularities, whose properties and dynamics are efficiently encoded using dimer diagrams. The holographic dual of the axion monodromy is a quasi-periodic chain of Seiberg dualities. \\ ( http://arxiv.org/abs/1405.7044 , 608kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7086 (*cross-listing*) Date: Tue, 27 May 2014 23:29:28 GMT (610kb,D) Title: Ken Wilson: Solving the Strong Interactions Authors: Michael E. Peskin Categories: physics.hist-ph cond-mat.stat-mech hep-ph hep-th Comments: 19 pages, 6 figures \\ Ken Wilson's ideas on the renormalization group were shaped by his attempts to build a theory of the strong interactions based on the concepts of quantum field theory. I describe the development of his ideas by reviewing four of Wilson's most important papers. [contribution to the Journal of Statistical Physics Special Issue in Memory of K. G. Wilson] \\ ( http://arxiv.org/abs/1405.7086 , 610kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7133 (*cross-listing*) Date: Wed, 28 May 2014 06:51:14 GMT (24kb) Title: Testing in-medium $\pi N$ dynamics on pionic atoms Authors: E. Friedman and A. Gal Categories: nucl-th hep-ph nucl-ex Comments: 15 pages, 3 figures, to be published in Nuclear Physics A special issue in memory of Gerry Brown \\ A general algorithm for handling the energy dependence of meson-nucleon amplitudes in the nuclear medium has been recently applied to antikaons and to eta mesons. Here we test this approach on $\pi N$ amplitudes in pionic atoms where direct comparison can be made with ample experimental results. Applying this algorithm to a large-scale fit of 100 pionic-atom data points across the periodic table, which also include the `deeply-bound' states in Sn and Pb, reaffirms earlier conclusions on the density-dependent renormalization of the $\pi N$ threshold isovector amplitude $b_1$, or equivalently the renormalization of the pion decay constant $f_{\pi}$ in the nuclear medium. \\ ( http://arxiv.org/abs/1405.7133 , 24kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7188 (*cross-listing*) Date: Wed, 28 May 2014 10:35:42 GMT (424kb,D) Title: A model-independent fit to Planck and BICEP2 data Authors: Laura Barranco, Lotfi Boubekeur and Olga Mena Categories: astro-ph.CO hep-ph Comments: 7 pages and 5 figures Report-no: IFIC/14-37 \\ Inflation is the leading theory to describe elegantly the initial conditions that led to structure formation in our universe. In this paper, we present a novel phenomenological fit to the Planck, WMAP polarisation (WP) and the BICEP2 datasets using an alternative parameterisation. Instead of starting from inflationary potentials and computing the inflationary observables, we use a phenomenological parameterisation due to Mukhanov, describing inflation by an effective equation-of-state, in terms of the number of e-folds and two phenomenological parameters $\alpha$ and $\beta$. Within such a parametrisation, which captures the different inflationary models in a model-independent way, the values of the scalar spectral index $n_s$, its running and the tensor-to-scalar ratio $r$ are predicted, given a set of parameters $(\alpha,\beta)$. We perform a Markov Chain Monte Carlo analysis of these parameters, and we show that the combined analysis of Planck and WP data favours the Starobinsky and Higgs inflation scenarios. Assuming that the BICEP2 signal is not entirely due to foregrounds, the addition of this last data set prefers instead the $\phi^2$ chaotic models. The constraint we get from Planck and WP data alone on the derived tensor-to-scalar ratio is $r<0.18$ at $95\%$~CL, value which is consistent with the one quoted from the BICEP2 collaboration analysis, $r = 0.16^{+0-06}_{-0.05}$, after foreground subtraction. This is not necessarily at odds with the $2\sigma$ tension found between Planck and BICEP2 measurements when analysing data in terms of the usual $n_s$ and $r$ parameters, given that the parameterisation used here includes, implicitly, a running spectral index. \\ ( http://arxiv.org/abs/1405.7188 , 424kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7217 (*cross-listing*) Date: Wed, 28 May 2014 12:36:07 GMT (6929kb,D) Title: Reactor Neutrino Experiments: $\theta_{13}$ and Beyond Authors: X. Qian and W. Wang Categories: hep-ex hep-ph nucl-ex Comments: brief review for Modern Physics Letter A Journal-ref: MPLA, vol 29, issue 16, 1430016 (2014) DOI: 10.1142/S021773231430016X \\ We review the current-generation short-baseline reactor neutrino experiments that have firmly established the third neutrino mixing angle $\theta_{13}$ to be non-zero. The relative large value of $\theta_{13}$ (around 9$^\circ$) has opened many new and exciting opportunities for future neutrino experiments. Daya Bay experiment with the first measurement of $\Delta m^2_{ee}$ is aiming for a precision measurement of this atmospheric mass-squared splitting with a comparable precision as $\Delta m^2_{\mu\mu}$ from accelerator muon neutrino experiments. JUNO, a next-generation reactor neutrino experiment, is targeting to determine the neutrino mass hierarchy with medium baselines ($\sim$50 km). Beside these {\color{black} opportunities enabled by the large $\theta_{13}$}, the current-generation (Daya Bay, Double Chooz, and RENO) and the next-generation (JUNO, RENO-50, and PROSPECT) reactor experiments, with their unprecedented statistics, are also leading the precision era of the 3-flavor neutrino oscillation physics as well as constraining new physics beyond the neutrino Standard Model. \\ ( http://arxiv.org/abs/1405.7217 , 6929kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7272 (*cross-listing*) Date: Wed, 28 May 2014 15:24:42 GMT (1996kb) Title: Compatibility of Planck and BICEP2 in the Light of Inflation Authors: Jerome Martin, Christophe Ringeval, Roberto Trotta and Vincent Vennin Categories: astro-ph.CO gr-qc hep-ph hep-th Comments: 25 pages, 19 figures, uses RevTex \\ We investigate the implications for inflation of the detection of B-modes polarization in the Cosmic Microwave Background (CMB) by BICEP2. We show that the hypothesis of primordial origin of the measurement is only favored by the first four bandpowers, while the others would prefer unreasonably large values of the tensor-to-scalar ratio. Using only those four bandpowers, we carry out a complete analysis in the cosmological and inflationary slow-roll parameter space using the BICEP2 polarization measurements alone and extract the Bayesian evidences and complexities for all the Encyclopaedia Inflationaris models. This allows us to determine the most probable and simplest BICEP2 inflationary scenarios. Although this list contains the simplest monomial potentials, it also includes many other scenarios, suggesting that focusing model building efforts on large field models only is unjustified at this stage. We demonstrate that the sets of inflationary models preferred by Planck alone and BICEP2 alone are almost disjoint, indicating a clear tension between the two data sets. We address this tension with a Bayesian measure of compatibility between BICEP2 and Planck. We find that for models favored by Planck the two data sets tend to be incompatible, whereas there is a moderate evidence of compatibility for the BICEP2 preferred models. As a result, it would be premature to draw any conclusion on the best Planck models, such as Starobinsky and/or Kahler moduli inflation. For the subset of scenarios not exhibiting data sets incompatibility, we update the evidences and complexities using both data sets together. \\ ( http://arxiv.org/abs/1405.7272 , 1996kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7298 (*cross-listing*) Date: Wed, 28 May 2014 16:20:30 GMT (1877kb) Title: Suppression of the LHC $p/\pi$ ratio due to the QCD mass spectrum Authors: Jacquelyn Noronha-Hostler and Carsten Greiner Categories: nucl-th hep-ph nucl-ex Comments: 15 pages, 8 figures \\ Recent measurements of the proton to pion ratio at $\sqrt{s}_{NN}=2.7$ TeV by the ALICE collaboration at the LHC have found it to be lower than predictions from thermal fits. In this paper we investigate the role that the extended mass spectrum via Hagedorn states- massive resonances that follow an exponential mass spectrum and possess large decay widths- play in the determination of particle ratios at LHC through a scenario of multi-particle reactions and dynamical chemical equilibrium within the hadron gas phase. We show that it is possible to describe the lower $p/\pi$ ratio at LHC while still obtaining the experimental ratio of $K/\pi$ and $\Lambda/\pi^+$ in the Hagedorn state scenario if the protons are underpopulated at the switching temperature from hydrodynamics to the hadron gas phase. \\ ( http://arxiv.org/abs/1405.7298 , 1877kb) ------------------------------------------------------------------------------ \\ arXiv:1405.7351 (*cross-listing*) Date: Wed, 28 May 2014 19:50:23 GMT (1450kb,D) Title: Toward an Understanding of Foreground Emission in the BICEP2 Region Authors: Raphael Flauger, J. Colin Hill, David N. Spergel Categories: astro-ph.CO gr-qc hep-ph hep-th Comments: 11 pages, 5 figures \\ BICEP2 has reported the detection of a degree-scale B-mode polarization pattern in the Cosmic Microwave Background (CMB) and has interpreted the measurement as evidence for primordial gravitational waves. Motivated by the profound importance of the discovery of gravitational waves from the early Universe, we examine to what extent a combination of Galactic foregrounds and lensed E-modes could be responsible for the signal. We reanalyze the BICEP2 results and show that the 100x150 GHz and 150x150 GHz data are consistent with a cosmology with r=0.2 and negligible foregrounds, but also with a cosmology with r=0 and a significant dust polarization signal. We give independent estimates of the dust polarization signal in the BICEP2 region using four different approaches. While these approaches are consistent with each other, the expected amplitude of the dust polarization power spectrum remains uncertain by about a factor of three. The lower end of the prediction leaves room for a primordial contribution, but at the higher end the dust in combination with the standard CMB lensing signal could account for the BICEP2 observations, without requiring the existence of primordial gravitational waves. By measuring the cross-correlations between the pre-Planck templates used in the BICEP2 analysis and between different versions of a data-based template, we emphasize that cross-correlations between models are very sensitive to noise in the polarization angles and that measured cross-correlations are likely underestimates of the contribution of foregrounds to the map. These results suggest that BICEP1 and BICEP2 data alone cannot distinguish between foregrounds and a primordial gravitational wave signal, and that future Keck Array observations at 100 GHz and Planck observations at higher frequencies will be crucial to determine whether the signal is of primordial origin. (abridged) \\ ( http://arxiv.org/abs/1405.7351 , 1450kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:1212.5245 (*cross-listing*) replaced with revised version Wed, 28 May 2014 13:58:00 GMT (565kb) Title: Pion dissociation and Levinson's theorem in hot PNJL quark matter Authors: A. Wergieluk, D. Blaschke, Yu. L. Kalinovsky, A. Friesen Categories: nucl-th hep-ph Comments: 18 pages, 6 figures Report-no: JINR Dubna Report No. E2-2013-19 Journal-ref: Phys.Part.Nucl.Lett. 10 (2013) 660-668 DOI: 10.1134/S1547477113070169 \\ ( http://arxiv.org/abs/1212.5245 , 565kb) ------------------------------------------------------------------------------ \\ arXiv:1305.1306 (*cross-listing*) replaced with revised version Wed, 28 May 2014 05:07:19 GMT (391kb,D) Title: On the Dynamics of Non-Relativistic Flavor-Mixed Particles Authors: Mikhail V. Medvedev Categories: astro-ph.CO hep-ph Comments: 16 pages, 8 figures. Accepted for publication in JCAP \\ ( http://arxiv.org/abs/1305.1306 , 391kb) ------------------------------------------------------------------------------ \\ arXiv:1305.3907 replaced with revised version Wed, 28 May 2014 02:20:29 GMT (497kb) Title: Generalized Beth--Uhlenbeck approach to mesons and diquarks in hot, dense quark matter Authors: D. Blaschke, M. Buballa, A. Dubinin, G. Roepke, D. Zablocki Categories: hep-ph nucl-th physics.plasm-ph Comments: 29 pages, 5 figures, revised version accepted for Annals of Physics \\ ( http://arxiv.org/abs/1305.3907 , 497kb) ------------------------------------------------------------------------------ \\ arXiv:1401.7671 replaced with revised version Wed, 28 May 2014 01:30:50 GMT (2076kb,D) Title: A New Look at Higgs Constraints on Stops Authors: JiJi Fan and Matthew Reece Categories: hep-ph Comments: v2: references added, accepted by JHEP \\ ( http://arxiv.org/abs/1401.7671 , 2076kb) ------------------------------------------------------------------------------ \\ arXiv:1402.5328 replaced with revised version Wed, 28 May 2014 12:32:48 GMT (1583kb,D) Title: Hilltop inflation with preinflation from coupling to matter fields Authors: Stefan Antusch, David Nolde and Stefano Orani Categories: hep-ph astro-ph.CO Comments: 26 pages, 10 figures, v2: reference added to match publication in JCAP Journal-ref: JCAP 1405 (2014) 034 DOI: 10.1088/1475-7516/2014/05/034 \\ ( http://arxiv.org/abs/1402.5328 , 1583kb) ------------------------------------------------------------------------------ \\ arXiv:1403.2271 replaced with revised version Wed, 28 May 2014 19:12:18 GMT (22kb) Title: $\Psi$ and $\Upsilon$ Production In pp Collisions at 8.0 TeV Authors: Leonard S. Kisslinger and Debasish Das Categories: hep-ph Comments: 5 pages, 2 figures Journal-ref: Mod. Phys. Lett. A, Vol. 29, No. 16 (2014) 1450082 DOI: 10.1142/S0217732314500825 \\ ( http://arxiv.org/abs/1403.2271 , 22kb) ------------------------------------------------------------------------------ \\ arXiv:1403.5168 (*cross-listing*) replaced with revised version Wed, 28 May 2014 12:51:34 GMT (625kb,D) Title: Primordial Magnetic Fields from the Post-Inflationary Universe Authors: Takeshi Kobayashi Categories: astro-ph.CO gr-qc hep-ph hep-th Comments: 30 pages, 6 figures, v2: published in JCAP Journal-ref: JCAP05(2014)040 DOI: 10.1088/1475-7516/2014/05/040 \\ ( http://arxiv.org/abs/1403.5168 , 625kb) ------------------------------------------------------------------------------ \\ arXiv:1404.2404 replaced with revised version Wed, 28 May 2014 12:47:29 GMT (734kb) Title: A relation between screening masses and real-time rates Authors: B.B. Brandt, A. Francis, M. Laine, H.B. Meyer Categories: hep-ph hep-lat Comments: 32 pages. v2: clarifications added, typos corrected; published version Report-no: MITP/14-025 Journal-ref: JHEP 1405 (2014) 117 \\ ( http://arxiv.org/abs/1404.2404 , 734kb) ------------------------------------------------------------------------------ \\ arXiv:1404.7118 replaced with revised version Wed, 28 May 2014 00:35:32 GMT (57kb,D) Title: A Dynamical Framework for KeV Dirac Neutrino Warm Dark Matter Authors: Dean J. Robinson and Yuhsin Tsai Categories: hep-ph Comments: 7 pages, improved discussion of thermal history \\ ( http://arxiv.org/abs/1404.7118 , 57kb) ------------------------------------------------------------------------------ \\ arXiv:1405.3730 replaced with revised version Wed, 28 May 2014 07:25:21 GMT (487kb) Title: The 3.5 keV X-ray line signature from annihilating and decaying dark matter in Weinberg model Authors: Seungwon Baek, P. Ko, Wan-Il Park Categories: hep-ph Comments: 15 pages, 4 figures; references added Report-no: KIAS-O14002 \\ ( http://arxiv.org/abs/1405.3730 , 487kb) ------------------------------------------------------------------------------ \\ arXiv:1405.3737 (*cross-listing*) replaced with revised version Wed, 28 May 2014 03:20:09 GMT (100kb) Title: New x-ray measurements in Helium-like Atoms increase discrepancy between experiment and theoretical QED Authors: Christopher T. Chantler, Andrew T. Payne, John D. Gillaspy, Lawrence T. Hudson, Lucas F. Smale, Albert Henins, Justin A. Kimpton, Endre Takacs Categories: physics.atom-ph hep-ph quant-ph Comments: 6 pages. 2 tables \\ ( http://arxiv.org/abs/1405.3737 , 100kb) ------------------------------------------------------------------------------ \\ arXiv:1405.4489 replaced with revised version Wed, 28 May 2014 08:40:22 GMT (632kb) Title: Higgs-strahlung production process e^+ e^- \to Z h at the future Higgs factory in the Minimal Dilaton Model Authors: Junjie Cao, Zhaoxia Heng, Dongwei Li, Liangliang Shang, Peiwen Wu Categories: hep-ph Comments: 18pages, 8 fiugres, References added \\ ( http://arxiv.org/abs/1405.4489 , 632kb) ------------------------------------------------------------------------------ \\ arXiv:1405.5910 (*cross-listing*) replaced with revised version Wed, 28 May 2014 16:21:32 GMT (0kb,I) Title: Measuring the Higgs Self-Coupling Constant at a Multi-TeV Muon Collider Authors: Alexander Conway, Hans Wenzel, Ronald Lipton and Estia Eichten Categories: hep-ex hep-ph physics.acc-ph Comments: This paper has been withdrawn due to not being submitted with permission of all authors \\ ( http://arxiv.org/abs/1405.5910 , 0kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- For subscribe options to combined physics archives, e-mail To: physics@arXiv.org, Subject: subscribe ----------------------------------------------------------------------------- For help on viewing and making submissions, see http://arXiv.org/help/ For a list of archive mirror sites, see http://arXiv.org/servers.html ----------------------------------------------------------------------------- Third-party submissions cause excessive problems. 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