Date: Wed, 30 Mar 16 00:19:45 GMT Subject: hep-ph daily 16 new + 8 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 Mon 28 Mar 16 20:00:00 GMT to Tue 29 Mar 16 20:00:00 GMT ------------------------------------------------------------------------------ \\ arXiv:1603.08525 Date: Mon, 28 Mar 2016 20:00:14 GMT (3713kb,D) Title: Cosmological constraints on Dark Matter models for collider searches Authors: Tristan du Pree, Kristian Hahn, Philip Harris, Christos Roskas Categories: hep-ph Comments: 16 pages, 6 figures \\ Searches for Dark Matter at the LHC are commonly described in terms of simplified models with scalar, pseudo-scalar, vector and axial-vector mediators. In this work we explore the constraints imposed on such models from the observed Dark Matter relic abundance. We present these constraints over a range of mediator masses relevant for the LHC and for future, higher energy colliders. We additionally compute bounds from a photon line search for the decay of a pseudo-scalar mediator to di-photons that includes the mediator mass region near 750 GeV. Finally, we compare cosmological constraints with the reach of a possible future 100 TeV circular hadron collider, indirect, and direct detection experiments. \\ ( http://arxiv.org/abs/1603.08525 , 3713kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08527 Date: Mon, 28 Mar 2016 20:00:27 GMT (20kb) Title: Effective field theory investigations of the XYZ puzzle Authors: Jorge Segovia Categories: hep-ph hep-ex hep-lat nucl-th Comments: 5 pages; contribution to the proceedings of the FAIRNESS2016: Workshop for young scientists with research interests focused on physics at FAIR. 14-19 February 2016. Garmisch-Partenkirchen, Germany \\ Quantum Chromodynamics, the theory of strong interactions, predicts several types of bound states. Among them are mesons ($q\bar{q}$) and baryons ($qqq$), which have been the only states observed in experiments for years. However, in the last decade, many states that do not fit this picture have been observed at $B$-factories (BaBar, Belle and CLEO), at $\tau$-charm facilities (CLEO-c, BESIII) and also at proton-proton colliders (CDF, D0, LHCb, ATLAS, CMS). There is growing evidence that at least some of the new charmonium- and bottomonium-like states, the so-called XYZ mesons, are new forms of matter such as quark-gluon hybrids, mesonic molecules or different arrangements of tetraquarks, pentaquarks... Effective Field Theories (EFTs) have been constructed for heavy-quark-antiquark bound states, but a general study of the XYZ mesons within the same framework has not yet been done. The scope of this conference proceedings is to discuss the possibilities we have in developing novel EFTs that, characterizing the conventional quarkonium states, facilitate also the systematic and model-independent description of the new exotic matter, in particular, the hybrid mesons. \\ ( http://arxiv.org/abs/1603.08527 , 20kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08679 Date: Tue, 29 Mar 2016 08:37:44 GMT (537kb) Title: Probing Models of Dirac Neutrino Masses via the Flavor Structure of the Mass Matrix Authors: Shinya Kanemura, Kodai Sakurai, Hiroaki Sugiyama Categories: hep-ph Comments: 19 pages, 18 eps files Report-no: UT-HET 113 \\ We classify models of the Dirac neutrino mass by concentrating on flavor structures of the mass matrix. The advantage of our classification is that we do not need to specify detail of models except for Yukawa interactions because flavor structures can be given only by products of Yukawa matrices. All possible Yukawa interactions between leptons (including the right-handed neutrino) are taken into account by introducing appropriate scalar fields. We also take into account the case with Yukawa interactions of leptons with the dark matter candidate. Then, we see that flavor structures can be classified into seven groups. The result is useful for the efficient test of models of the neutrino mass. One of seven groups can be tested by measuring the absolute neutrino mass. Other two can be tested by probing the violation of the lepton universality in $\ell \to \ell^\prime \nu \overline{\nu}$. In order to test the other four groups, we can rely on searches for new scalar particles at collider experiments. \\ ( http://arxiv.org/abs/1603.08679 , 537kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08690 Date: Tue, 29 Mar 2016 09:23:59 GMT (209kb,D) Title: Direct Neutrino Mass Experiments and Exotic Charged Current Interactions Authors: Patrick Otto Ludl, Werner Rodejohann Categories: hep-ph hep-ex nucl-ex nucl-th Comments: 38 pages, 6 figures, no diphotons \\ We study the effect of exotic charged current interactions on the electron energy spectrum in tritium decay, focussing on the KATRIN experiment and a possible modified setup that has access to the full spectrum. Both sub-eV and keV neutrino masses are considered. We perform a fully relativistic calculation and take all possible new interactions into account, demonstrating the possible sizable distortions in the energy spectrum. \\ ( http://arxiv.org/abs/1603.08690 , 209kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08696 Date: Tue, 29 Mar 2016 09:35:44 GMT (211kb,D) Title: Enhanced tau neutrino appearance through invisible decay Authors: Giulia Pagliaroli and Natalia Di Marco and Massimo Mannarelli Categories: hep-ph Comments: 5 pages, 5 figures \\ The decay of neutrino mass eigenstates leads to a change of the conversion and survival probability of neutrino flavor eigenstates. Remarkably, we find that the neutrino decay provides an enhancement of the expected tau appearance signal with respect to the standard oscillation scenario for the long-baseline OPERA experiment. The increase of the $\nu_\mu \rightarrow \nu_\tau$ conversion probability by the decay of one of the mass eigenstates is due to a reduction of the "destructive interference" among the different massive neutrino components. Motivated by the recently released results of the OPERA Collaboration showing a number of observed $\nu_\tau$ events larger than expected, we perform a statistical analysis including the invisible decay hypothesis. We obtain a very mild preference for invisible decays, with a best fit value $\tau_3/m_3 \simeq 2.6\times 10^{-13} $ s/eV, and a constraint at the 90$\%$ confidence level for the neutrino decay lifetime to be $\tau_3/m_3 \gtrsim 1.3\times 10^{-13}$ s/eV. \\ ( http://arxiv.org/abs/1603.08696 , 211kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08745 Date: Tue, 29 Mar 2016 12:37:16 GMT (1199kb) Title: Instantaneous Bethe-Salpeter Kernel for the Lightest Pseudoscalar Mesons Authors: Wolfgang Lucha, Franz F. Sch\"oberl Categories: hep-ph nucl-th Comments: 12 pages, 4 figures Report-no: HEPHY-PUB 964/16 \\ Starting from a phenomenologically successful, numerical solution of the Dyson-Schwinger equation that governs the quark propagator, we reconstruct in detail the interaction kernel that has to enter the instantaneous approximation to the Bethe-Salpeter equation to allow us to describe the lightest pseudoscalar mesons as quark-antiquark bound states exhibiting the (almost) masslessness necessary for them to be interpretable as the (pseudo) Goldstone bosons related to the spontaneous chiral symmetry breaking of quantum chromodynamics. \\ ( http://arxiv.org/abs/1603.08745 , 1199kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08748 Date: Tue, 29 Mar 2016 12:44:08 GMT (133kb) Title: Decay width of $d^*(2380)\to NN \pi\pi$ processes Authors: Yubing Dong, Fei Huang, Pengnian Shen, and Zongye Zhang Categories: hep-ph nucl-th Comments: 6 pages, 1 figure, 1 table \\ The decay widths of four-body double-pion decays $\ds\to pn \pi^0\pi^0$, $\ds\to pn \pi^+\pi^-$, and iso-scalar parts of $\ds\to pp \pi^0\pi^-$ and $\ds\to nn \pi^+\pi^0$ are explicitly calculated with the help of the $d^*$ wave function obtained in a chiral SU(3) quark model calculation. The effect of the dynamical structure on $\ds$'s width is analyzed both in the single $\Delta\Delta$ channel and coupled $\Delta\Delta$ and $CC$ channel approximations. It is found that in the coupled-channel approximation, the obtained partial decay widths of $\ds\to pn \pi^0\pi^0$, $\ds\to pn \pi^+\pi^-$, and those of $d^*$ to the iso-scalar parts of $pp \pi^0\pi^-$ and $nn \pi^+\pi^0$ are about $7.4$MeV, $16.4$MeV, $3.5$MeV and $3.5$MeV, respectively As a consequence, the total width is about $64.5$MeV. These widths are consistent with those estimated by using the corresponding cross section data in our previous investigation and also the observed data. But in the single $\Delta\Delta$ channel approximation, the widths are still almost 2-times larger than the measured values. Apparently, the explicitly calculated width together with the evaluated mass of $d^*$ in the coupled $\Delta\Delta$ and $CC$ channel approximation can well explain the observed data, which again supports our assertion that the $\ds$ resonance is a six-quark dominated exotic state. \\ ( http://arxiv.org/abs/1603.08748 , 133kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08786 Date: Tue, 29 Mar 2016 14:25:39 GMT (518kb,D) Title: Coherency in Neutrino-Nucleus Elastic Scattering Authors: S. Kerman, V. Sharma, M. Deniz, H.T. Wong, J.-W. Chen, H.B. Li, S.T. Lin, C.-P. Liu, and Q. Yue (TEXONO Collaboration) Categories: hep-ph hep-ex nucl-ex nucl-th Comments: 4 pages, 4 figures, 3 tables Report-no: NCTS-ECP/1503 \\ Neutrino-nucleus elastic scattering provides a unique laboratory to study the quantum mechanical coherency effects in electroweak interactions, towards which several experimental programs are being actively pursued. We report results of our quantitative studies on the transitions towards decoherency. A parameter ($\alpha$) is identified to describe the degree of coherency, and its variations with incoming neutrino energy, detector threshold and target nucleus are studied. The ranges of $\alpha$ which can be probed with realistic neutrino experiments are derived, indicating complementarity between projects with different sources and targets. Uncertainties in nuclear physics and in $\alpha$ would constrain sensitivities in probing physics beyond the standard model. The maximum neutrino energies corresponding to $\alpha$>0.95 are derived. \\ ( http://arxiv.org/abs/1603.08786 , 518kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08802 Date: Tue, 29 Mar 2016 15:10:26 GMT (20kb) Title: 750 GeV Diphoton Excess as a Composite (Pseudo)scalar Boson from New Strong Interaction Authors: P. Ko, Chaehyun Yu, Tzu-Chiang Yuan Categories: hep-ph hep-ex Comments: 6 pages, 3 figures \\ The diphoton excess at 750 GeV would make a definite signal of new physics beyond the Standard Model, if it is confirmed. In this letter, we consider a possibility that the excess is due to a composite (pseudo)scalar boson, whose constituents are either new vector-like quarks (Q\overline{Q}) or scalar quarks (\widetilde{Q} \widetilde{Q}^\dagger) which feel new QCD-like vectorlike confining force with confinement scale Lambda_h. Assuming m_Q (m_{\widetilde Q}) >> Lambda_h, the observed 750 GeV excess could be either Q\overline{Q} (^1S_0) state with J^{PC} = 0^{-+} or \widetilde{Q} \widetilde{Q}^\dagger (^1S_0) state with J^{PC}=0^{++}. For the Q\bar{Q} scenario, there will be a spin-triplet partner psi_Q which is slightly heavier that eta_Q because of the hyper fine interactions mediated by h-gluon exchange. We consider productions and decays of eta_Q, eta_{\widetilde Q} and psi_Q using the nonrelativistic QCD methods, and identify the parameter regions which can explain the observed diphoton excess. We discuss how to test these scenarios using the Drell-Yan process for psi_Q case, and the dijet azimuthal angular distributions to determine the J^{PC} quantum number of the diphoton excess. \\ ( http://arxiv.org/abs/1603.08802 , 20kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08834 Date: Tue, 29 Mar 2016 16:30:26 GMT (675kb,D) Title: Signatures of sneutrino dark matter in an extension of the CMSSM Authors: Shankha Banerjee, Genevi\`eve B\'elanger, Biswarup Mukhopadhyaya and Pasquale D. Serpico Categories: hep-ph astro-ph.HE hep-ex Comments: 29 pages, 5 figures and 5 tables Report-no: LAPTH-016/16, HRI-RECAPP-2016-007 \\ Current data (LHC direct searches, Higgs mass, dark matter-related bounds) severely affect the constrained minimal SUSY standard model (CMSSM) with neutralinos as dark matter candidates. But the evidence for neutrino masses coming from oscillations requires extending the SM with at least right-handed neutrinos with a Dirac mass term. In turn, this implies extending the CMSSM with right-handed sneutrino superpartners, a scenario we dub $\tilde\nu$CMSSM. These additional states constitute alternative dark matter candidates of the superWIMP type, produced via the decay of the long-lived next-to-lightest SUSY particle (NLSP). Here we consider the interesting and likely case where the NLSP is a $\tilde\tau$: despite the modest extension with respect to the CMSSM this scenario has peculiar phenomenological signatures such as charged tracks. After taking into account the role played by neutrino mass bounds and the specific cosmological bounds from the big bang nucleosynthesis in selecting the viable parameter space, we discuss the excellent discovery prospects for this model at the future runs of the LHC. We show that it is possible to probe $\tilde{\tau}_1$ masses up to 600 GeV at the 14 TeV LHC with $\mathcal{L} = 1100$ fb$^{-1}$ when one considers a pair production of staus with two or more hard jets through all SUSY processes. We also show the complementary discovery prospects from a direct $\tilde{\tau}_1$ pair production, as well as at the new experiment MoEDAL. \\ ( http://arxiv.org/abs/1603.08834 , 675kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08848 Date: Tue, 29 Mar 2016 17:06:29 GMT (658kb,D) Title: Mass Spectra of Heavy-Light Mesons in Heavy Hadron Chiral Perturbation Theory Authors: Mohammad H. Alhakami Categories: hep-ph Comments: 12 pages, LATEX2e, 4 figures \\ We study the masses of the low-lying charm and bottom mesons within the framework of heavy- hadron chiral perturbation theory. We work to third order in the chiral expansion, where meson loops contribute. In contrast to previous approaches, we use physical meson masses in evaluating these loops. This ensures that their imaginary parts are consistent with the observed widths of the D-mesons. The lowest odd- and even-parity, strange and nonstrange charm mesons provide enough constraints to determine only certain linear combinations of the low-energy constants (LECs) in the effective Lagrangian. We comment on how lattice QCD could provide further information to disentangle these constants. Then we use the results from the charm sector to predict the spectrum of odd- and even-parity of the bottom mesons. The predicted masses from our theory are in good agreement with experimentally measured masses for the case of the odd-parity sector. For the even-parity sector, the B-meson states have not yet been observed; thus, our results provide useful information for experimentalists investigating such states. The near degeneracy of nonstrange and strange scalar B mesons is confirmed in our predictions using HHChPT. We show why previous approaches of using HHChPT in studying the mass degeneracy in the scalar states of charm and bottom meson sectors gave unsatisfactory results. \\ ( http://arxiv.org/abs/1603.08848 , 658kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08849 Date: Tue, 29 Mar 2016 17:09:19 GMT (1106kb,D) Title: Using nonlocal probes of thermalization for a strongly interacting non-Abelian plasma Authors: Loredana Bellantuono, Pietro Colangelo, Fulvia De Fazio, Floriana Giannuzzi, Stefano Nicotri Categories: hep-ph Comments: 21 pages, 9 figures, 1 table Report-no: BARI-TH/16-704 \\ We use a holographic method to investigate thermalization of a boost-invariant strongly interacting non-Abelian plasma. Boundary sourcing, a distorsion of the boundary metric, is employed to drive the system far from equilibrium. Thermalization is analyzed through nonlocal probes: the equal-time two-point correlation function of large conformal dimension operators in the boundary theory, and Wilson loops of different shapes. We study the dependence of the thermalization time on the size of the probes, and compare the results to the ones obtained using local observables: the onset of thermalization is first observed at short distances. \\ ( http://arxiv.org/abs/1603.08849 , 1106kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08881 Date: Tue, 29 Mar 2016 18:46:04 GMT (80kb) Title: Light-front representation of chiral dynamics with Delta isobar and large-N_c relations Authors: C. Granados, C. Weiss Categories: hep-ph nucl-th Comments: 35 pages, 9 figures Report-no: JLAB-THY-16-2235 \\ Transverse densities describe the spatial distribution of electromagnetic current in the nucleon at fixed light-front time. At peripheral distances b = O(M_pi^{-1}) the densities are governed by chiral dynamics and can be calculated model-independently using chiral effective field theory (EFT). Recent work has shown that the EFT results can be represented in first-quantized form, as overlap integrals of chiral light-front wave functions describing the transition of the nucleon to soft-pion-nucleon intermediate states, resulting in a quantum-mechanical picture of the peripheral transverse densities. We now extend this representation to include intermediate states with Delta isobars and implement relations based on the large-N_c limit of QCD. We derive the wave function overlap formulas for the Delta contributions to the peripheral transverse densities by way of a three-dimensional reduction of relativistic chiral EFT expressions. Our procedure effectively maintains rotational invariance and avoids the ambiguities with higher-spin particles in the light-front time-ordered approach. We study the interplay of pi-N and pi-Delta intermediate states in the quantum-mechanical picture of the densities in a transversely polarized nucleon. We show that the correct N_c-scaling of the charge and magnetization densities emerges as the result of the particular combination of currents generated by intermediate states with degenerate N and Delta. The off-shell behavior of the chiral EFT is summarized in contact terms and can be studied easily. The methods developed here can be applied to other peripheral densities and to moments of the nucleon's generalized parton distributions. \\ ( http://arxiv.org/abs/1603.08881 , 80kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08906 Date: Tue, 29 Mar 2016 19:46:32 GMT (2409kb,D) Title: Recommendations for PDF usage in LHC predictions Authors: A. Accardi, S. Alekhin, J. Bl\"umlein, M.V. Garzelli, K. Lipka, W. Melnitchouk, S. Moch, R. Placakyte, J.F. Owens, E. Reya, N. Sato, A. Vogt and O. Zenaiev Categories: hep-ph hep-ex Comments: 65 pages pdflatex, 19 figures, 15 tables Report-no: DESY 16-041, DO-TH 16/05, JLAB-THY-16-2231, LTH 1081 \\ We review the present status of the determination of parton distribution functions (PDFs) in the light of the precision requirements for the LHC in Run 2 and other future hadron colliders. We provide brief reviews of all currently available PDF sets and use them to compute cross sections for a number of benchmark processes, including Higgs boson production in gluon-gluon fusion at the LHC. We show that the differences in the predictions obtained with the various PDFs are due to particular theory assumptions made in the fits of those PDFs. We discuss PDF uncertainties in the kinematic region covered by the LHC and on averaging procedures for PDFs, such as advocated by the PDF4LHC15 sets, and provide recommendations for the usage of PDF sets for theory predictions at the LHC. \\ ( http://arxiv.org/abs/1603.08906 , 2409kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08911 Date: Tue, 29 Mar 2016 19:49:48 GMT (679kb,D) Title: Pinning down electroweak dipole operators of the top quark Authors: Markus Schulze and Yotam Soreq Categories: hep-ph Comments: 8 pages, 3 figures \\ We consider hadronic top quark pair production and pair production in association with a photon or a $Z$ boson to probe electroweak dipole couplings in $t\bar{b}W$, $t\bar{t}\gamma$ and $t\bar{t}Z$ interactions. We demonstrate how measurements of these processes at the 13 TeV LHC can be combined to disentangle and constrain anomalous dipole operators. The construction of cross section ratios allows us to significantly reduce various uncertainties and exploit orthogonal sensitivity between the $t\bar{t}\gamma$ and $t\bar{t}Z$ couplings. In addition, we show that angular correlations in $t\bar{t}$ production can be used to constrain the remaining $t\bar{b}W$ dipole operator. Our approach yields excellent sensitivity to the anomalous couplings and can be a further step towards precise and direct measurements of the top quark electroweak interactions. \\ ( http://arxiv.org/abs/1603.08911 , 679kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08913 Date: Tue, 29 Mar 2016 19:50:10 GMT (403kb,D) Title: A 750 GeV graviton from holographic composite dark sectors Authors: Adrian Carmona Categories: hep-ph hep-ex Comments: 6 pages, 4 figures Report-no: CERN-TH-2016-073 \\ We show that the 750 GeV di-photon excess can be interpreted as a spin-2 resonance arising from a strongly interacting dark sector featuring some departure from conformality. This spin-2 resonance has negligible couplings to the SM particles, with the exception of the SM gauge bosons which mediate the two sectors. We have explicitly studied the collider constraints as well as some theoretical bounds in a holographic five dimensional model with a warp factor that deviates from AdS$_5$. In particular, we have shown that it is not possible to decouple the vector resonances arising from the strong sector while explaining the di-photon anomaly and keeping the five dimensional gravity theory under perturbative control. However, due to the deformation of conformality, vector resonances with masses around the TeV scale can be present while all experimental constraints are met. \\ ( http://arxiv.org/abs/1603.08913 , 403kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:1603.07101 (*cross-listing*) Date: Wed, 23 Mar 2016 09:32:00 GMT (18kb,D) Title: Tuning the Cosmological Constant, Broken Scale Invariance, Unitarity Authors: Stefan Forste and Paul Manz Categories: hep-th gr-qc hep-ph Comments: 17 pages \\ We study gravity coupled to a cosmological constant and a scale but not conformally invariant sector. In Minkowski vacuum, scale invariance is spontaneously broken. We consider small fluctuations around the Minkowski vacuum. At the linearised level we find that the trace of metric perturbations receives a positive or negative mass squared contribution. However, only for the Fierz-Pauli combination the theory is free of ghosts. The mass term for the trace of metric perturbations can be cancelled by explicitly breaking scale invariance. This reintroduces fine-tuning. Models based on four form field strength show similarities with explicit scale symmetry breaking due to quantisation conditions. \\ ( http://arxiv.org/abs/1603.07101 , 18kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08333 (*cross-listing*) Date: Mon, 28 Mar 2016 08:00:00 GMT (37kb) Title: Quark-Jet model for transverse momentum dependent fragmentation functions Authors: W. Bentz, A. Kotzinian, H. H. Matevosyan, Y. Ninomiya, A. W. Thomas, K. Yazaki Categories: nucl-th hep-ex hep-ph Comments: 18 pages, 4 figures Report-no: ADP-16-12/T967 \\ In order to describe the hadronization of polarized quarks, we discuss an extension of the quark jet model to transverse momentum dependent fragmentation functions. The description is based on a product ansatz, where each factor in the product represents a transverse momentum dependent splitting function, which we take from previous works in Nambu-Jona-Lasinio (NJL) or quark-pion coupling models. The resulting integral equations and sum rules are discussed in detail for the case of inclusive pion production. In particular, we demonstrate that the 3-dimensional momentum sum rules are satisfied naturally in this transverse momentum dependent NJL-jet model. Our results are well suited for numerical calculations in effective quark theories, and can be implemented in Monte-Carlo simulations of polarized quark hadronization processes. \\ ( http://arxiv.org/abs/1603.08333 , 37kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08591 (*cross-listing*) Date: Sun, 6 Mar 2016 07:27:27 GMT (64kb,D) Title: A simple alternative to the Crystal Ball function Authors: Souvik Das Categories: hep-ex hep-ph Comments: 6 pages, 6 figures \\ We present a simple alternative to the Crystal Ball function that has an exponential tail stitched to a Gaussian core. It has one parameter less than the Crystal Ball function and, where appropriate, offers more stable fits to peaks that continue into exponential tails. The function may also be extended with two exponential tails on each side of the Gaussian, and this has two parameters less than the corresponding double-shouldered Crystal Ball function. This function has been used to model background and signal processes in a recent Higgs pair production search and may be of versatile use in experimental physics and other fields. \\ ( http://arxiv.org/abs/1603.08591 , 64kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08749 (*cross-listing*) Date: Tue, 29 Mar 2016 12:44:45 GMT (256kb,D) Title: Band Structure in Yang-Mills Theories Authors: Constantin Bachas and Theodore Tomaras Categories: hep-th hep-ph Comments: 15 pages, 2 figures Report-no: LPTENS 16/01, ITCP-IPP 2016/03 \\ We show how Yang-Mills theory on $S^3\times R$ can exhibit a spectrum with continuous bands if coupled either to a topological 3-form gauge field, or to a dynamical axion with heavy Peccei-Quinn scale. The basic mechanism consists in associating winding histories to a bosonic zero mode whose role is to convert a circle in configuration space into a helix. The zero mode is, respectively, the holonomy of the 3-form field or the axion momentum. In these models different theta sectors coexist but are not mixed by local operators. Our analysis sheds light on, and extends Seiberg's proposal for modifying the topological sums in quantum field theories. It refutes a recent claim that $B+L$ violation at LHC is unsuppressed. \\ ( http://arxiv.org/abs/1603.08749 , 256kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08770 (*cross-listing*) Date: Tue, 29 Mar 2016 13:43:35 GMT (84kb,D) Title: Universality of anomalous conductivities in theories with higher-derivative holographic duals Authors: Sa\v{s}o Grozdanov and Napat Poovuttikul Categories: hep-th cond-mat.str-el hep-ph nucl-th Comments: 28 pages, 1 figure \\ Anomalous chiral conductivities in theories with global anomalies are independent of whether they are computed in a weakly coupled quantum (or thermal) field theory, hydrodynamics, or at infinite coupling from holography. While the presence of dynamical gauge fields and mixed, gauge-global anomalies can destroy this universality, in their absence, the non-renormalisation of anomalous Ward identities is expected to be obeyed at all intermediate coupling strengths. In holography, bulk theories with higher-derivative corrections incorporate coupling constant corrections to the boundary theory observables in an expansion around infinite coupling. In this work, we investigate the coupling constant dependence and universality of anomalous conductivities (and thus of the anomalous Ward identities) in general, four-dimensional systems that possess asymptotically anti-de Sitter holographic duals with a non-extremal black brane in five dimensions, and anomalous transport introduced into the boundary theory via the bulk Chern-Simons action. We show that in bulk theories with arbitrary gauge- and diffeomorphism-invariant higher-derivative actions, anomalous conductivities, which can incorporate an infinite series of (inverse) coupling constant corrections, remain universal. Owing to the existence of the membrane paradigm, the proof reduces to a construction of bulk effective theories at the horizon and the boundary. It only requires us to impose the condition of horizon regularity and correct boundary conditions on the fields. We also discuss ways to violate the universality by violating conditions for the validity of the membrane paradigm, in particular, by adding mass to the vector fields (a case with a mixed, gauge-global anomaly) and in bulk geometries with a naked singularity. \\ ( http://arxiv.org/abs/1603.08770 , 84kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08825 (*cross-listing*) Date: Sun, 13 Dec 2015 16:59:01 GMT (395kb) Title: Multiplicity predictions for Pb-Pb collisions at $\sqrt{s} = 5.02$ TeV based on the MC Modified Glauber model Authors: Andrey Seryakov and Grigory Feofilov Categories: nucl-th hep-ph nucl-ex \\ We present predictions of the mean multiplicity yields for different centrality classes of Pb-Pb collisions at $\sqrt{s} = 5.02$ TeV at the LHC, obtained using the Monte-Carlo Modified Glauber model (MGM) [1]. Contrary to generally used standard Glauber calculations, the MGM takes into account the energy conservation in the soft particles production. The only one efficient model parameter was tuned and fixed previously (k=0.35) by fitting the available data on multiplicity for all colliding systems up to RHIC energies. The MGM has shown already a good predictive capability for the yields at $\sqrt{s} = 2.76$ TeV, and it is used again within the same MC code for the calculations at $\sqrt{s} = 5.02$ TeV \\ ( http://arxiv.org/abs/1603.08825 , 395kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08854 (*cross-listing*) Date: Tue, 29 Mar 2016 17:24:07 GMT (604kb) Title: The $\beta$-function of $SU(3)$ gauge theory with $ N_f = 10 $ massless fermions in the fundamental representation Authors: Ting-Wai Chiu Categories: hep-lat hep-ph hep-th Comments: 12 pages, 3 eps figures Report-no: NTUTH-16-505A \\ We present the first study of the discrete $\beta$-function of the $ SU(3) $ gauge theory with 10 massless domain-wall fermions in the fundamental representation. The renormalized coupling is obtained by the finite-volume gradient flow scheme, and the discrete $\beta$-function is extrapolated to the continuum limit by the step-scaling method. Our result of the discrete $\beta$-function (with $ s = 2 $) suggests that this theory possesses an infrared fixed point around $ g_c^2 \sim 7.0 $ for $ c = \sqrt{8t}/L = 0.3 $. \\ ( http://arxiv.org/abs/1603.08854 , 604kb) ------------------------------------------------------------------------------ \\ arXiv:1603.08864 (*cross-listing*) Date: Tue, 29 Mar 2016 17:56:52 GMT (13kb) Title: Scaling laws in chiral hydrodynamic turbulence Authors: Naoki Yamamoto Categories: hep-th astro-ph.HE hep-ph Comments: 8 pages \\ We study the turbulent regime of chiral (magneto)hydrodynamics for charged and neutral matter with chirality imbalance. We find that the chiral magnetohydrodynamics for charged plasmas possesses a unique scaling symmetry only without fluid helicity under the local charge neutrality. We also find a different type of unique scaling symmetry in the chiral hydrodynamics for neutral matter with fluid helicity in the inertial range. We show that these symmetries dictate the self-similar inverse cascade of the magnetic and kinetic energies. Our results imply the possible inverse energy cascade in core-collapse supernovae due to the chiral transport of neutrinos. \\ ( http://arxiv.org/abs/1603.08864 , 13kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:1502.03262 replaced with revised version Tue, 29 Mar 2016 08:17:10 GMT (14kb) Title: Hypothesis about semiweak interaction and experiments with solar neutrinos Authors: L.M. Slad Categories: hep-ph astro-ph.SR hep-ex nucl-th Comments: 12 pages, v2: Additions to the text and literature \\ ( http://arxiv.org/abs/1502.03262 , 14kb) ------------------------------------------------------------------------------ \\ arXiv:1504.03795 replaced with revised version Tue, 29 Mar 2016 02:38:30 GMT (3767kb) Title: Cartan's Supersymmetry and the Decay of a $H^0(0^+)$ Authors: Sadataka Furui Categories: hep-ph Comments: 14 pages, 11 figures, Argument on the S meson(750 GeV) whose mass is 6 times that of Higgs boson(125GeV) is added \\ ( http://arxiv.org/abs/1504.03795 , 3767kb) ------------------------------------------------------------------------------ \\ arXiv:1504.04128 replaced with revised version Tue, 29 Mar 2016 16:21:52 GMT (80kb) Title: New Physics Opportunities in the Boosted Di-Higgs plus \ET Signature Authors: Zhaofeng Kang, P. Ko and Jinmian Li Categories: hep-ph hep-ex Comments: Version to appear in PRL; major revision according to the referees' suggestion. The supplement file will be available from the e-journal \\ ( http://arxiv.org/abs/1504.04128 , 80kb) ------------------------------------------------------------------------------ \\ arXiv:1505.03870 replaced with revised version Tue, 29 Mar 2016 14:11:44 GMT (803kb) Title: Exclusive Radiative Higgs Decays as Probes of Light-Quark Yukawa Couplings Authors: Matthias Koenig and Matthias Neubert (Johannes Gutenberg University Mainz) Categories: hep-ph Comments: 25 pages plus appendices, 9 figures, 5 tables; v2: NLO evolution of Gegenbauer moments implemented in Appendix B, some references added; v3: typo in the value of C_{\gamma Z}(0) after eq. (35) fixed Report-no: MITP/15-031 Journal-ref: JHEP 1508 (2015) 012 DOI: 10.1007/JHEP08(2015)012 \\ ( http://arxiv.org/abs/1505.03870 , 803kb) ------------------------------------------------------------------------------ \\ arXiv:1508.07010 replaced with revised version Mon, 28 Mar 2016 20:17:41 GMT (839kb,D) Title: The Zbb Couplings at Future e+e- Colliders Authors: Stefania Gori, Jiayin Gu, Lian-Tao Wang Categories: hep-ph hep-ex Comments: 32 pages, 7 figures. v2: added appendix on theoretical uncertainties, minor corrections, references added, matches published version in JHEP \\ ( http://arxiv.org/abs/1508.07010 , 839kb) ------------------------------------------------------------------------------ \\ arXiv:1510.00302 replaced with revised version Tue, 29 Mar 2016 13:43:51 GMT (12kb) Title: The simplest 3-3-1 model Authors: Le Tho Hue, Le Duc Ninh Categories: hep-ph hep-ex Comments: 14 pages. matches published version Report-no: HU-EP-15/43 Journal-ref: Mod. Phys. Lett. A, Vol. 31, No. 10 (2016) 1650062 DOI: 10.1142/S0217732316500620 \\ ( http://arxiv.org/abs/1510.00302 , 12kb) ------------------------------------------------------------------------------ \\ arXiv:1510.07029 (*cross-listing*) replaced with revised version Tue, 29 Mar 2016 11:32:20 GMT (27kb) Title: Covariantised Vector Galileons Authors: Matthew Hull, Kazuya Koyama (ICG, Portsmouth), Gianmassimo Tasinato (Swansea) Categories: hep-th gr-qc hep-ph Comments: 27 pages, no figures, accepted version Journal-ref: Phys. Rev. D 93, 064012 (2016) DOI: 10.1103/PhysRevD.93.064012 \\ ( http://arxiv.org/abs/1510.07029 , 27kb) ------------------------------------------------------------------------------ \\ arXiv:1510.09198 (*cross-listing*) replaced with revised version Tue, 29 Mar 2016 19:40:44 GMT (7kb) Title: Chiral Magnetic-Vortical Wave Authors: David Frenklakh Categories: hep-th hep-ph Comments: 4 pages \\ ( http://arxiv.org/abs/1510.09198 , 7kb) ------------------------------------------------------------------------------ \\ arXiv:1511.01873 replaced with revised version Tue, 29 Mar 2016 12:31:06 GMT (775kb,D) Title: The Inert Zee Model Authors: Robinson Longas, Dilia Portillo, Diego Restrepo, Oscar Zapata Categories: hep-ph Comments: 12 pages, 5 figures \\ ( http://arxiv.org/abs/1511.01873 , 775kb) ------------------------------------------------------------------------------ \\ arXiv:1511.08120 replaced with revised version Tue, 29 Mar 2016 07:47:00 GMT (2793kb,D) Title: Heavy to light Higgs boson decays at NLO in the Singlet Extension of the Standard Model Authors: F. Bojarski, G. Chalons, D. Lopez-Val, T. Robens Categories: hep-ph Comments: 35 pages (plus appendix and references), 11 Figures, 10 Tables. V2: minor changes updated, matching the published journal version DOI: 10.1007/JHEP02(2016)147 \\ ( http://arxiv.org/abs/1511.08120 , 2793kb) ------------------------------------------------------------------------------ \\ arXiv:1511.09404 replaced with revised version Tue, 29 Mar 2016 14:50:09 GMT (872kb,D) Title: The Pentabox Master Integrals with the Simplified Differential Equations approach Authors: Costas G. Papadopoulos, Damiano Tommasini, Christopher Wever Categories: hep-ph hep-th Comments: Revised version accepted for publication in JHEP. Ancillary files with results can be downloaded from https://www.dropbox.com/s/90iiqfcazrhwtso/results.tgz?dl=0 \\ ( http://arxiv.org/abs/1511.09404 , 872kb) ------------------------------------------------------------------------------ \\ arXiv:1512.02226 replaced with revised version Tue, 29 Mar 2016 05:31:37 GMT (61kb) Title: Reason for T2K to run in dominant neutrino mode for detecting CP violation Authors: Monojit Ghosh Categories: hep-ph Comments: 9 pages, 5 figures, Accepted in Phys. Rev. D without any revision \\ ( http://arxiv.org/abs/1512.02226 , 61kb) ------------------------------------------------------------------------------ \\ arXiv:1512.03001 replaced with revised version Tue, 29 Mar 2016 16:31:21 GMT (526kb) Title: Shear viscosity over entropy density ratio with extended quasi-particles Authors: M. Horv\'ath, A. Jakov\'ac Categories: hep-ph hep-th Comments: 13 pages, 7 figures, uses revtex4-1; published version Journal-ref: Phys. Rev. D 93, 056010 (2016) DOI: 10.1103/PhysRevD.93.056010 \\ ( http://arxiv.org/abs/1512.03001 , 526kb) ------------------------------------------------------------------------------ \\ arXiv:1601.03604 replaced with revised version Tue, 29 Mar 2016 09:47:45 GMT (60kb) Title: The 750 GeV diphoton LHC excess and Extra Z's in Heterotic-String Derived Models Authors: Alon E. Faraggi and John Rizos Categories: hep-ph hep-th Comments: 17 pages. 1 figure. Minor revisions. References added. Published version Report-no: LTH-1073 \\ ( http://arxiv.org/abs/1601.03604 , 60kb) ------------------------------------------------------------------------------ \\ arXiv:1601.03746 (*cross-listing*) replaced with revised version Tue, 29 Mar 2016 08:36:24 GMT (301kb,D) Title: Research infrastructures in the LHC era: a scientometric approach Authors: Stefano Carrazza, Alfio Ferrara, Silvia Salini Categories: physics.soc-ph cs.DL hep-ex hep-ph Comments: 39 pages, 9 figures, final version published in TFS Special Issue with updated references Report-no: CERN-PH-TH-2015-246, TIF-UNIMI-2015-17 \\ ( http://arxiv.org/abs/1601.03746 , 301kb) ------------------------------------------------------------------------------ \\ arXiv:1602.02782 replaced with revised version Tue, 29 Mar 2016 14:58:04 GMT (2545kb,D) Title: Closing the Wedge: Search Strategies for Extended Higgs Sectors with Heavy Flavor Final States Authors: Stefania Gori, Ian-Woo Kim, Nausheen R. Shah and Kathryn M. Zurek Categories: hep-ph hep-ex Comments: Added a Fig. and updated references. Matches journal version. 31 pages, 11 figures Report-no: WSU-HEP-1508 \\ ( http://arxiv.org/abs/1602.02782 , 2545kb) ------------------------------------------------------------------------------ \\ arXiv:1602.04337 (*cross-listing*) replaced with revised version Tue, 29 Mar 2016 15:38:29 GMT (33kb,D) Title: Tighter bounds on a hypothetical graviton screening mass from the gravitational wave observation GW150914 at LIGO Authors: Pedro Bicudo Categories: gr-qc hep-ph Comments: 6 pages, 1 figure, 1 table, new version with more clarified details and references added \\ ( http://arxiv.org/abs/1602.04337 , 33kb) ------------------------------------------------------------------------------ \\ arXiv:1602.09112 replaced with revised version Tue, 29 Mar 2016 14:32:12 GMT (579kb,D) Title: Favoured $B_c$ Decay modes to search for a Majorana neutrino Authors: Sanjoy Mandal and Nita Sinha Categories: hep-ph hep-ex Comments: 29 pages, 12 figures; Plots for Bc->Bsllpi mode redone to account for Bs reconstruction, more sections added to include additional Bc decay modes which provide tighter exclusion curves for the mixing angles. References and acknowledgements added. Text modified to widen scope of the paper \\ ( http://arxiv.org/abs/1602.09112 , 579kb) ------------------------------------------------------------------------------ \\ arXiv:1603.00965 (*cross-listing*) replaced with revised version Tue, 29 Mar 2016 19:57:22 GMT (1555kb,D) Title: Search for Gamma-ray Emission from Dark Matter Annihilation in the Small Magellanic Cloud with the Fermi Large Area Telescope Authors: Regina Caputo, Matthew R. Buckley, Pierrick Martin, Eric Charles, Alyson M. Brooks, Alex Drlica-Wagner, Jennifer M. Gaskins, Matthew Wood Categories: astro-ph.HE hep-ex hep-ph Comments: 17 pages, 11 figures. Accepted by PRD Journal-ref: Phys. Rev. D. 93 062004 (2016) DOI: 10.1103/PhysRevD.93.062004 \\ ( http://arxiv.org/abs/1603.00965 , 1555kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- 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/