Date: Fri, 28 May 10 00:04:41 GMT Subject: hep-ph daily 15 new + 7 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 Wed 26 May 10 20:00:00 GMT to Thu 27 May 10 20:00:00 GMT ------------------------------------------------------------------------------ \\ arXiv:1005.4930 Date: Wed, 26 May 2010 20:00:17 GMT (414kb) Title: The Fate of R-Parity Authors: Pavel Fileviez Perez, Sogee Spinner Categories: hep-ph hep-ex \\ The possible origin of the R-parity violating interactions in the minimal supersymmetric standard model and its connection to the radiative symmetry breaking mechanism (RSBM) is investigated. In the context of the simplest model where the implementation of the RSBM is possible, we find that in the majority of the parameter space R-parity is spontaneously broken at the low-scale. These results hint at the possibility that R-parity violating processes will be observed at the Large Hadron Collider, if Supersymmetry is realized in nature. \\ ( http://arxiv.org/abs/1005.4930 , 414kb) ------------------------------------------------------------------------------ \\ arXiv:1005.4939 Date: Wed, 26 May 2010 20:09:59 GMT (58kb) Title: Compact QED Tree-Level Amplitudes From Dressed BCFW Recursion Relations Authors: Simon Badger, Johannes M. Henn Categories: hep-ph Comments: 12 pages, 3 figures \\ We construct a modified on-shell BCFW recursion relation to derive compact analytic representations of tree-level amplitudes in QED. As an application, we study the amplitudes of a fermion pair coupling to an arbitrary number of photons and give compact formulae for the NMHV and NNMHV case. We demonstrate that the new recursion relation reduces the growth in complexity with additional photons to be exponential rather than factorial. \\ ( http://arxiv.org/abs/1005.4939 , 58kb) ------------------------------------------------------------------------------ \\ arXiv:1005.4953 Date: Wed, 26 May 2010 21:22:00 GMT (77kb) Title: Neutrino Masses from Fine Tuning Authors: B. N. Grossmann, Z. Murdock and S. Nandi Categories: hep-ph Comments: 12 pages, 4 figures and 3 tables Report-no: OSU-HEP-10-03 \\ We present a new approach for generating tiny neutrino masses. The Dirac neutrino mass matrix gets contributions from two new Higgs doublets with their vevs at the electroweak (EW) scale. Neutrino masses are tiny not because of tiny Yukawa couplings, or very heavy ($\sim 10^{14}\textrm{GeV}$) right handed neutrinos. They are tiny because of a cancelation in the Dirac neutrino mass matrix (fine tuning). After fine tuning to make the Dirac neutrino mass matrix at the $10^{-4}$ GeV scale, light neutrino masses are obtained in the correct scale via the see-saw mechanism with the right handed neutrino at the EW scale. The proposal links neutrino physics to collider physics. The Higgs search strategy is completely altered. For a wide range of Higgs masses, the Standard Model Higgs decays dominantly to $\nu_L N_R$ mode giving rise to the final state $\bar{\nu} \nu \bar{b} b$, or $\bar{\nu} \nu \tau^+\tau^-$. This can be tested at the LHC, and possibly at the Tevatron. \\ ( http://arxiv.org/abs/1005.4953 , 77kb) ------------------------------------------------------------------------------ \\ arXiv:1005.5001 Date: Thu, 27 May 2010 08:04:54 GMT (217kb) Title: Excited Dark Matter versus PAMELA/Fermi Authors: James M. Cline Categories: hep-ph astro-ph.CO astro-ph.GA Comments: 4 pages, presented at Moriond Cosmology 2010 Report-no: CERN-PH-TH/2010-101 \\ Excitation of multicomponent dark matter in the galactic center has been proposed as the source of low-energy positrons that produce the excess 511 keV gamma rays that have been observed by INTEGRAL. Such models have also been promoted to explain excess high-energy electrons/positrons observed by the PAMELA, Fermi/LAT and H.E.S.S. experiments. We investigate whether one model can simultaneously fit all three anomalies, in addition to further constraints from inverse Compton scattering by the high-energy leptons. We find models that fit both the 511 keV and PAMELA excesses at dark matter masses M < 400 GeV, but not the Fermi lepton excess. The conflict arises because a more cuspy DM halo profile is needed to match the observed 511 keV signal than is compatible with inverse Compton constraints at larger DM masses. \\ ( http://arxiv.org/abs/1005.5001 , 217kb) ------------------------------------------------------------------------------ \\ arXiv:1005.5005 Date: Thu, 27 May 2010 09:03:58 GMT (704kb) Title: Amplitudes for $gg \to VV'$ and their high energy SUSY constraints Authors: G.J. Gounaris, J. Layssac and F.M. Renard Categories: hep-ph Comments: 27 pages, 39 figures \\ We study how the property of asymptotic helicity conservation (HCns), expected for any 2-to-2 process in the minimal supersymmetric model (MSSM), is realized in the processes $gg \to \gamma\gamma,\gamma Z,ZZ,W^+W^-$, at the 1loop electroweak order and very high energies. The violation of this property for the same process in the standard model (SM), is also shown. This strengthens the claim that HCns is specific to the renormalizable SUSY model, and not generally valid in SM. HCns strongly reduces the number of non-vanishing 2-to-2 amplitudes at asymptotic energies in MSSM. Consequences at LHC and higher energy colliders are identified. \\ ( http://arxiv.org/abs/1005.5005 , 704kb) ------------------------------------------------------------------------------ \\ arXiv:1005.5022 Date: Thu, 27 May 2010 10:25:56 GMT (2642kb) Title: Color neutral 2SC phase of cold and dense quark matter in the presence of constant magnetic fields Authors: Sh. Fayazbakhsh and N. Sadooghi Categories: hep-ph hep-th nucl-th Comments: 33 pages, 9 Figures, 5 Tables \\ The color neutral superconducting 2SC phase of cold and dense quark matter is studied in the presence of constant magnetic fields and at moderate baryon densities. In the first part of the paper, a two-flavor effective Nambu--Jona-Lasinio model consisting of a chiral symmetry breaking mass gap sigma_{B}, a color superconducting mass gap Delta_{B} and a color neutrality coefficient mu_{8} is introduced in the presence of a rotated U(1) magnetic field B. To study the phenomenon of magnetic catalysis in the presence of strong magnetic fields, the gap equations corresponding to sigma_{B} and Delta_{B}, as well as mu_{8} are solved in the lowest Landau level approximation. In the second part of the paper, a detailed numerical analysis is performed to explore the effect of any arbitrary magnetic field on the above mass gaps and the color neutrality coefficient. The structure of the chiral symmetry breaking and color superconducting phases is also presented in the mu_{c}-B plane, and the effect of the color neutrality coefficient mu_{8} on the phase structure of the model is explored. As it turns out, whereas the transition from the chiral symmetry breaking to color superconducting phase is of first order, nonvanishing mu_{8} affects essentially the second order phase transition from color superconducting to the normal phase. \\ ( http://arxiv.org/abs/1005.5022 , 2642kb) ------------------------------------------------------------------------------ \\ arXiv:1005.5062 Date: Thu, 27 May 2010 13:17:57 GMT (101kb) Title: Looking for Squark Pair Production in the Early LHC Data Authors: Z. Usubov Categories: hep-ph Comments: LaTex, 15 pages, 8 figures, 2 tables \\ We examine the ability of LHC experiments to observe jets from squark pair production at the center-of-mass energy E$_{CM}$=10 TeV and 1 fb$^{-1}$ of integrated luminosity. We point out the crucial influence of initial- and final-state radiation on the signal/background discriminating ability of different kinematic variables. The reliable measurements of missing transverse energy and stransverse mass would play a key role in picking out the signal against the background. \\ ( http://arxiv.org/abs/1005.5062 , 101kb) ------------------------------------------------------------------------------ \\ arXiv:1005.5066 Date: Thu, 27 May 2010 13:30:24 GMT (63kb) Title: $D_s(0^\pm)$ Mesons spectroscopy in Gaussian Sum Rules Authors: Shuiguo Wen and Jueping Liu Categories: hep-ph Comments: 5 pages, 4 figures Journal-ref: Chin. Phys. Lett. 26 (2009) 021201 DOI: 10.1088/0256-307X/26/2/021201 \\ The masses of the $D_s(0^\pm)$ mesons are investigated from a view-point of ordinary light-heavy system in the framework of the Gaussian sum rules, which are worked out by means of the Laplacian transformation to the usual Borel sum rules. Using the standard input of QCD non-perturbative parameters, the corresponding mass spectra and couplings of the currents to the $D_s(0^\pm)$ mesons are obtained. Our results are $m_{D_s(0^-)}=1.968\pm0.016\pm0.003$ GeV and $m_{D_s(0^+)}=2.320\pm0.014\pm0.003$ GeV, which are in accordance well with the experimental data, 1.969 GeV and 2.317 GeV. \\ ( http://arxiv.org/abs/1005.5066 , 63kb) ------------------------------------------------------------------------------ \\ arXiv:1005.5122 Date: Thu, 27 May 2010 17:11:22 GMT (354kb) Title: Gluon emission in Quark-Gluon Plasma Authors: S V Suryanarayana Categories: hep-ph hep-ex hep-th Comments: 7 pages, 12 figures \\ Gluon radiation is an important mechanism for parton energy loss as the parton traverses the quark gluon plasma (QGP) medium. We studied the gluon emission in QGP using AMY formalism. In the present work, we obtained gluon emission amplitude {\bf F}({\bf h},p,k) function, which is a solution of the integral equations describing gluon radiation including Landau-Pomeranchuk-Migdal (LPM) effects, using iterations method. We define a new dynamical scale for gluon emission denoted by $x$. The gluon emission rate is obtained by integrating these amplitude function over {\bf h}. We show that these obey a simple scaling in terms of this dynamical variable $x$. We define the gluon emission function $g(x)$ for gluon radiation for the three processes $g\rightarrow gg$, $q\rightarrow gq$ and $g\rightarrow q\bar{q}$. In terms of this $g(x)$ function, the parton energy loss calculations, due to medium induced gluon radiation, may become simplified. \\ ( http://arxiv.org/abs/1005.5122 , 354kb) ------------------------------------------------------------------------------ \\ arXiv:1005.5131 Date: Thu, 27 May 2010 17:47:13 GMT (1103kb) Title: Light neutralino dark matter with a very light Higgs for CoGeNT and DAMA/LIBRA data Authors: Kyu Jung Bae, Hyung Do Kim, Seodong Shin Categories: hep-ph Comments: 16 pages, 3 figures \\ Recently, the CoGeNT collaboration reported the WIMP candidate signal events exceeding the known backgrounds where the light WIMP with large cross section is supported. Motivated by this issue, we analyze a light neutralino dark matter scenario with a very light CP-even Higgs mediation in the elastic scattering process, which provides the mass and direct detection cross section to explain the CoGeNT result. To be compatible with the result of LEP experiments, the light CP-even Higgs is favored to be in 9 to 10 GeV. Such a scenario can be realized in the "Beyond the MSSM" context. The relic abundance consistent with the WMAP result can be obtained when twice of neutralino mass is close to the light Higgs mass via the resonance enhancement of the annihilation cross section. As a result, the neutralino mass is predicted to be at around 5 to 6 GeV. \\ ( http://arxiv.org/abs/1005.5131 , 1103kb) ------------------------------------------------------------------------------ \\ arXiv:1005.5134 Date: Thu, 27 May 2010 17:52:54 GMT (105kb) Title: From Soft Walls to Infrared Branes Authors: Gero von Gersdorff Categories: hep-ph Comments: 14 pages, 2 figures \\ Five dimensional warped spaces with soft walls are generalizations of the standard Randall-Sundrum compactifications, where instead of an infrared brane one has a curvature singularity (with vanishing warp factor) at finite proper distance in the bulk. We project the physics near the singularity onto a hypersurface located a small distance away from it in the bulk. This results in a completely equivalent description of the soft wall in terms of an effective infrared brane, hiding any singular point. We perform explicitly this calculation for two classes of soft wall backgrounds used in the literature. The procedure has several advantages. It separates in a clean way the physics of the soft wall from the physics of the five dimensional bulk, facilitating a more direct comparison with standard two-brane warped compactifications. Moreover, consistent soft walls show a sort of universal behavior near the singularity which is reflected in the effective brane Lagrangian. Thirdly, for many purposes, a good approximation is obtained by assuming the bulk background away from the singularity to be the usual Randall-Sundrum metric, thus making the soft wall backgrounds better analytically tractable. We check the validity of this procedure by calculating the spectrum of bulk fields and comparing it to the exact result, finding very good agreement. \\ ( http://arxiv.org/abs/1005.5134 , 105kb) ------------------------------------------------------------------------------ \\ arXiv:1005.5136 Date: Thu, 27 May 2010 18:01:47 GMT (742kb) Title: Tau-Sneutrino NLSP and Multilepton Signatures at the LHC Authors: Terrance Figy, Krzysztof Rolbiecki, Yudi Santoso Categories: hep-ph Comments: 25 pages, 14 figures Report-no: IPPP/10/37, DCPT/10/74, CERN-PH-TH/2010-107 \\ In models with gravitino as the lightest supersymmetric particle(LSP), the next to lightest supersymmetric particle (NLSP) can have a long lifetime and appear stable in collider experiments. We study the leptonic signatures of such a scenario with tau-sneutrino as the NLSP, which is realized in the non-universal Higgs masses scenario. We focus on an interesting trilepton signature with two like-sign taus and an electron or a muon of opposite sign. The neutralinos and charginos are quite heavy in the model considered, and the trilepton signal comes mostly from the slepton-sneutrino production. We identify the relevant backgrounds, taking into account tau decays, and devise a set of cuts to optimize this trilepton signal. We simulate signal and backgrounds at the LHC with 14 TeV center-of-mass energy. Although the sleptons in this model are relatively light, O(100 GeV), discovery is more demanding compared to typical neutralino LSP scenarios. The trilepton signal requires large amount of accumulated data, at least ~80 fb^-1, at the CM energy of 14 TeV. \\ ( http://arxiv.org/abs/1005.5136 , 742kb) ------------------------------------------------------------------------------ \\ arXiv:1005.5153 Date: Thu, 27 May 2010 19:21:48 GMT (161kb) Title: Non-linear evolution in CCFM: The interplay between coherence and saturation Authors: Emil Avsar and Anna M. Stasto Categories: hep-ph Comments: 37 pages, 21 figures \\ We solve the CCFM equation numerically in the presence of a boundary condition which effectively incorporates the non-linear dynamics. We retain the full dependence of the unintegrated gluon distribution on the coherence scale, and extract the saturation momentum. The resulting saturation scale is a function of both rapidity and the coherence momentum. In Deep Inelastic Scattering this will lead to a dependence of the saturation scale on the photon virtuality in addition to the usual x-Bjorken dependence. At asymptotic energies the interplay between the perturbative non-linear physics, and that of the QCD coherence, leads to an interesting and novel dynamics where the saturation momentum itself eventually saturates. We also investigate various implementations of the "non-Sudakov" form factor. It is shown that the non-linear dynamics leads to almost identical results for different form factors. Finally, different choices of the scale of the running coupling are analyzed and implications for the phenomenology are discussed. \\ ( http://arxiv.org/abs/1005.5153 , 161kb) ------------------------------------------------------------------------------ \\ arXiv:1005.5159 Date: Thu, 27 May 2010 19:55:31 GMT (139kb) Title: An R-parity conserving radiative neutrino mass model without right-handed neutrinos Authors: Mayumi Aoki, Shinya Kanemura, Tetsuo Shindou, and Kei Yagyu Categories: hep-ph Comments: 19 pages, 5 figures Report-no: KANAZAWA-10-03, UT-HET 038, KU-PH 005 \\ The model proposed by A. Zee (1986) and K.S. Babu (1988) is a simple radiative seesaw model, in which tiny neutrino masses are generated at the two-loop level. We investigate a supersymmetric extension of the Zee-Babu model under R-parity conservation. The lightest superpartner particle can then be a dark matter candidate. We find that the neutrino data can be reproduced with satisfying current data from lepton flavour violation even in the scenario where not all the superpartner particles are heavy. Phenomenology at the Large Hadron Collider is also discussed. \\ ( http://arxiv.org/abs/1005.5159 , 139kb) ------------------------------------------------------------------------------ \\ arXiv:1005.5160 Date: Thu, 27 May 2010 19:55:47 GMT (1391kb) Title: Left-Right Symmetry at LHC Authors: Alessio Maiezza, Miha Nemevsek, Fabrizio Nesti, Goran Senjanovic Categories: hep-ph Comments: 32 pages \\ We revisit the issue of the limit on the scale of Left-Right symmetry breaking. We focus on the minimal SU(2)_L x SU(2)_R x U(1)_B-L gauge theory with the seesaw mechanism and discuss the two possibilities of defining Left-Right symmetry as parity or charge conjugation. In the commonly adopted case of parity, we perform a complete numerical study of the quark mass matrices and the associated left and right mixing matrices without any assumptions usually made in the literature about the ratio of vacuum expectation values. We find that the usual lower limit on the mass of the right-handed gauge boson from the K mass difference, M_WR>2.5TeV, is subject to a possible small reduction due to the difference between right and left Cabibbo angles. In the case of charge conjugation the limit on M_WR is somewhat more robust. However, the more severe bounds from CP-violating observables are absent in this case. In fact, the free phases can also resolve the present mild discrepancy between the Standard Model and CP-violation in the $B$-sector. Thus, even in the minimal case, both charged and neutral gauge bosons may be accessible at the Large Hadron Collider with spectacular signatures of lepton number violation. \\ ( http://arxiv.org/abs/1005.5160 , 1391kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:0905.3518 (*cross-listing*) Date: Thu, 21 May 2009 15:54:53 GMT (51kb) Title: Kaon properties in (proto)neutron stars Authors: Amruta Mishra, Arvind Kumar, Sambuddha Sanyal, V. Dexheimer, Stefan Schramm Categories: nucl-th hep-ph Comments: 17 pages including 4 figures \\ The modification on kaon and antikaon properties of in the interior of (proto-)neutron stars is investigated using a chiral SU(3) model. The parameters of the model are fitted to nuclear matter saturation properties, baryon octet vacuum masses, hyperon optical potentials and low energy a kaon-nucleon scattering lengths. We study the kaon/antikaon medium modification and explore the possibility of antikaon condensation in (proto-)neutron star matter at zero as well as finite temperature/entropy and neutrino content. The effect of hyperons on kaon and antikaon optical potentials is also investigated at different stages of the neutron star evolution. \\ ( http://arxiv.org/abs/0905.3518 , 51kb) ------------------------------------------------------------------------------ \\ arXiv:1005.4549 (*cross-listing*) Date: Tue, 25 May 2010 12:15:55 GMT (667kb) Title: Relic gravitational waves in the light of 7-year Wilkinson Microwave Anisotropy Probe data and improved prospects for the Planck mission Authors: D. Baskaran, L. P. Grishchuk, W. Zhao Categories: gr-qc astro-ph.CO hep-ph hep-th Comments: 27 pages, 12 (colour) figures \\ The new release of data from Wilkinson Microwave Anisotropy Probe improves the observational situation with relic gravitational waves. The 7-year results enhance the indications of relic gravitational waves in the existing data and change to the better the prospects of confident detection of relic gravitational waves by the currently operating Planck satellite. We apply to WMAP7 data the same methods of analysis that we used earlier [W. Zhao, D. Baskaran, and L.P. Grishchuk, Phys. Rev. D 80, 083005 (2009)] with WMAP5 data. The maximum likelihood value of the quadrupole ratio $R$, which characterizes the amount of relic gravitational waves, increases up to R=0.264, and the interval separating this value from the point R=0 (the hypothesis of no gravitational waves) increases up to a $2\sigma$ level. Assuming that the WMAP7 maximum likelihood set of parameters is correct, the signal-to-noise ratio $S/N$ for the detection of relic gravitational waves by the Planck experiment increases up to $S/N=4.04$, even under pessimistic assumptions with regard to residual foreground contamination and instrumental noises. We comment on theoretical frameworks that, in the case of success, will be accepted or decisively rejected by the Planck observations. \\ ( http://arxiv.org/abs/1005.4549 , 667kb) ------------------------------------------------------------------------------ \\ arXiv:1005.4802 (*cross-listing*) Date: Wed, 26 May 2010 12:58:06 GMT (2668kb) Date (revised v2): Thu, 27 May 2010 12:00:15 GMT (2596kb) Title: Positronium Portal into Hidden Sector: A new Experiment to Search for Mirror Dark Matter Authors: Paolo Crivelli, Alexander Belov, Ulisse Gendotti, Sergei Gninenko, Andre Rubbia Categories: hep-ex astro-ph.CO hep-ph Comments: 38 pages, 28 Figures 2 Tables \\ The understanding of the origin of dark matter has great importance for cosmology and particle physics. Several interesting extensions of the standard model dealing with solution of this problem motivate the concept of hidden sectors consisting of SU(3)xSU(2)_LxU(1)_Y singlet fields. Among these models, the mirror matter model is certainly one of the most interesting. The model explains the origin of parity violation in weak interactions, it could also explain the baryon asymmetry of the Universe and provide a natural ground for the explanation of dark matter. The mirror matter could have a portal to our world through photon-mirror photon mixing (epsilon). This mixing would lead to orthopositronium (o-Ps) to mirror orthopositronium oscillations, the experimental signature of which is the apparently invisible decay of o-Ps. In this paper, we describe an experiment to search for the decay o-Ps -> invisible in vacuum by using a pulsed slow positron beam and a massive 4pi BGO crystal calorimeter. The developed high efficiency positron tagging system, the low calorimeter energy threshold and high hermiticity allow the expected sensitivity in mixing strength to be epsilon about 10^-9, which is more than one order of magnitude below the current Big Bang Nucleosynthesis limit and in a region of parameter space of great theoretical and phenomenological interest. The vacuum experiment with such sensitivity is particularly timely in light of the recent DAMA/LIBRA observations of the annual modulation signal consistent with a mirror type dark matter interpretation. \\ ( http://arxiv.org/abs/1005.4802 , 2596kb) ------------------------------------------------------------------------------ \\ arXiv:1005.5018 (*cross-listing*) Date: Thu, 27 May 2010 10:03:44 GMT (403kb) Title: D mesons and charmonium states in asymmetric nuclear matter at finite temperatures Authors: Arvind Kumar, Amruta Mishra Categories: nucl-th hep-ph Comments: 61 pages, 19 figues, to be published in Phys. Rev. C \\ We investigate the in-medium masses of $D$ and $\bar{D}$ mesons in the isospin-asymmetric nuclear matter at finite temperatures arising due to the interactions with the nucleons, the scalar isoscalar meson $\sigma$, and the scalar iso-vector meson $\delta$ within a SU(4) model. The in-medium masses of $J/\psi$ and the excited charmonium states ($\psi(3686)$ and $\psi(3770)$) are also calculated in the hot isospin asymmetric nuclear matter in the present investigation. These mass modifications arise due to the interaction of the charmonium states with the gluon condensates of QCD, simulated by a scalar dilaton field introduced to incorporate the broken scale invariance of QCD within the effective chiral model. The change in the mass of $J/\psi$ in the nuclear matter with the density is seen to be rather small, as has been shown in the literature by using various approaches, whereas, the masses of the excited states of charmonium ($\psi(3686)$ and $\psi(3770)$) are seen to have considerable drop at high densities. The present study of the in-medium masses of $D$ ($\bar{D}$) mesons as well as of the charmonium states will be of relevance for the observables from the compressed baryonic matter, like the production and collective flow of the $D$ ($\bar D$) mesons, resulting from the asymmetric heavy ion collision experiments planned at the future facility of the FAIR, GSI. The mass modifications of $D$ and $\bar{D}$ mesons as well as of the charmonium states in hot nuclear medium can modify the decay of the charmonium states ($\Psi^{'}, \chi_{c}, J/\Psi$) to $D\bar{D}$ pairs in the hot dense hadronic matter. The small attractive potentials observed for the $\bar{D}$ mesons may lead to formation of the $\bar{D}$ mesic nuclei. \\ ( http://arxiv.org/abs/1005.5018 , 403kb) ------------------------------------------------------------------------------ \\ arXiv:1005.5076 (*cross-listing*) Date: Thu, 27 May 2010 14:14:27 GMT (461kb) Title: Reheating for Closed String Inflation Authors: Michele Cicoli, Anupam Mazumdar Categories: hep-th astro-ph.CO hep-ph Comments: 37 pages + appendix, 5 figures \\ We point out some of the outstanding challenges for embedding inflationary cosmology within string theory studying the process of reheating for models where the inflaton is a closed string mode parameterising the size of an internal cycle of the compactification manifold. A realistic model of inflation must explain the tiny perturbations in the cosmic microwave background radiation and also how to excite the ordinary matter degrees of freedom after inflation, required for the success of Big Bang Nucleosynthesis. We study these issues focusing on two promising inflationary models embedded in LARGE volume type IIB flux compactifications. We show that phenomenological requirements and consistency of the effective field theory treatment imply the presence at low energies of a hidden sector together with a visible sector, where the Minimal Supersymmetric Standard Model fields are residing. A detailed calculation of the inflaton coupling to the fields of the hidden sector, visible sector, and moduli sector, reveals that the inflaton fails to excite primarily the visible sector fields, instead hidden sector fields are excited copiously after the end of inflation. This sets severe constraints on hidden sector model building where the most promising scenario emerges as a pure N=1 SYM theory, forbidding the kinematical decay of the inflaton to the hidden sector. In this case it is possible to reheat the Universe with the visible degrees of freedom even though in some cases we discover a new tension between TeV scale SUSY and reheating on top of the well-known tension between TeV scale SUSY and inflation. \\ ( http://arxiv.org/abs/1005.5076 , 461kb) ------------------------------------------------------------------------------ \\ arXiv:1005.5078 (*cross-listing*) Date: Thu, 27 May 2010 14:22:49 GMT (15kb) Title: Phenomenological constraints on accretion of non-annihilating dark matter on the PSR B1257+12 pulsar from orbital dynamics of its planets Authors: Lorenzo Iorio Categories: gr-qc astro-ph.SR hep-ph physics.space-ph Comments: LaTex2e, 16 pages, 4 tables, no figures \\ We analytically compute the effects that a mass variation rate \dot M/M of a pulsar may have on the changes \Delta\tau in the times of arrival of its pulses due to test particle companions, and on their orbital dynamics. We apply our results to the planetary system of the PSR B1257+12 pulsar, located in the Galaxy at 800 pc from us, to phenomenologically constrain a putative accretion of non-annihilating dark matter on the hosting neutron star. (Abridged) \\ ( http://arxiv.org/abs/1005.5078 , 15kb) ------------------------------------------------------------------------------ \\ arXiv:1005.5102 (*cross-listing*) Date: Thu, 27 May 2010 16:08:36 GMT (1075kb,D) Title: Light WIMPs in the Sun: Constraints from Helioseismology Authors: Daniel T. Cumberbatch, Joyce. A. Guzik, Joseph Silk, L. Scott Watson, and Stephen M. West Categories: astro-ph.SR hep-ph Comments: 7 pages, 3 figures \\ We propose a class of Dirac fermion light dark matter candidates with large spin-dependent elastic scattering cross sections and an intrinsic asymmetry that prevents annihilations after capture by the Sun. Our main conclusion demonstrates that both direct detection experiments and particle accelerators may be complemented by using the Sun as a probe for WIMP dark matter particles in the 5-50 GeV mass range. Future helioseismology observations, most notably involving g-modes, and future solar neutrino experiments may be able to constrain the allowable dark matter parameter space in a mass range that is of current interest for direct detection. \\ ( http://arxiv.org/abs/1005.5102 , 1075kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:0812.3215 replaced with revised version Thu, 27 May 2010 19:40:21 GMT (35kb) Title: MC-TESTER v. 1.23: a universal tool for comparisons of Monte Carlo predictions for particle decays in high energy physics Authors: N. Davidson, P. Golonka, T. Przedzinski, Z. Was Categories: hep-ph Comments: 27 pages 4 figures Report-no: CERN-LCGAPP-2008-02, IFJPAN-IV-2008-9 \\ ( http://arxiv.org/abs/0812.3215 , 35kb) ------------------------------------------------------------------------------ \\ arXiv:0912.1309 replaced with revised version Thu, 27 May 2010 09:10:37 GMT (450kb) Title: Slepton mass-splittings as a signal of LFV at the LHC Authors: Andrzej J. Buras, Lorenzo Calibbi, Paride Paradisi Categories: hep-ph hep-ex Comments: 11 pages, 5 figures. v2: added discussion on backgrounds, added references, version to be published on JHEP \\ ( http://arxiv.org/abs/0912.1309 , 450kb) ------------------------------------------------------------------------------ \\ arXiv:1001.3147 replaced with revised version Wed, 26 May 2010 21:14:24 GMT (29kb) Title: Uplifted supersymmetric Higgs region Authors: Bogdan A. Dobrescu and Patrick J. Fox Categories: hep-ph Comments: 14 pages; Signs in Eqns. (3.1) and (4.2) corrected, appendix included Report-no: FERMILAB-PUB-10-009-T \\ ( http://arxiv.org/abs/1001.3147 , 29kb) ------------------------------------------------------------------------------ \\ arXiv:1002.1555 (*cross-listing*) replaced with revised version Thu, 27 May 2010 05:26:53 GMT (2142kb,D) Title: Gravitational Waves from Collapsing Domain Walls Authors: Takashi Hiramatsu, Masahiro Kawasaki, and Ken'ichi Saikawa Categories: astro-ph.CO gr-qc hep-ph Comments: 18 pages, 8 figures; revised version of the manuscript, accepted for publication in JCAP Report-no: ICRR-Report-559-2009-21, IPMU10-0024 Journal-ref: JCAP05(2010)032 DOI: 10.1088/1475-7516/2010/05/032 \\ ( http://arxiv.org/abs/1002.1555 , 2142kb) ------------------------------------------------------------------------------ \\ arXiv:1002.1939 replaced with revised version Thu, 27 May 2010 17:12:48 GMT (58kb) Title: Tree Level Unitarity Bounds for the Minimal B-L Model Authors: L. Basso, A. Belyaev, S. Moretti and G. M. Pruna Categories: hep-ph Comments: 20 pages, 4 figures, 2 tables; 1d figure modified, typos corrected, bibliography augmented; published in PRD after minor adjustment Report-no: SHEP-09-31 Journal-ref: Phys. Rev. D 81, 095018 (2010) [11 pages] DOI: 10.1103/PhysRevD.81.095018 \\ ( http://arxiv.org/abs/1002.1939 , 58kb) ------------------------------------------------------------------------------ \\ arXiv:1003.0957 replaced with revised version Thu, 27 May 2010 11:53:28 GMT (241kb) Title: The First Moments of Nucleon Generalized Parton Distributions Authors: P. Wang, A. W. Thomas Categories: hep-ph Comments: 14 pages, 9 figures \\ ( http://arxiv.org/abs/1003.0957 , 241kb) ------------------------------------------------------------------------------ \\ arXiv:1003.0972 replaced with revised version Thu, 27 May 2010 05:46:16 GMT (245kb) Title: Analyses of decay constants and light-cone distribution amplitudes for s-wave heavy meson Authors: Chien-Wen Hwang Categories: hep-ph nucl-th Comments: 25 pages, 3 figures, 4 tables, numerical results gave more consideration to a power-law wave function. Accepted for Publication in Physical Review D \\ ( http://arxiv.org/abs/1003.0972 , 245kb) ------------------------------------------------------------------------------ \\ arXiv:1003.4265 (*cross-listing*) replaced with revised version Thu, 27 May 2010 00:48:23 GMT (558kb) Title: Gravity waves and the LHC: Towards high-scale inflation with low-energy SUSY Authors: Temple He, Shamit Kachru and Alexander Westphal Categories: hep-th astro-ph.CO hep-ph Comments: 21+1 pages, 5 figures, LaTeX, v2: added references, v3: very minor changes, version to appear in JHEP Report-no: SU-ITP-10-13 \\ ( http://arxiv.org/abs/1003.4265 , 558kb) ------------------------------------------------------------------------------ \\ arXiv:1004.0237 (*cross-listing*) replaced with revised version Thu, 27 May 2010 16:15:20 GMT (270kb) Title: Flavoring the Quark-Gluon Plasma with Charm Authors: Giorgio Torrieri (FIAS, Frankfurt U.), Jorge Noronha (Columbia U.) Categories: nucl-th hep-ex hep-ph nucl-ex Comments: Accepted for publication, Phys.Lett.B Additional discussion, main arguments and conclusions unchanged \\ ( http://arxiv.org/abs/1004.0237 , 270kb) ------------------------------------------------------------------------------ \\ arXiv:1004.1159 replaced with revised version Thu, 27 May 2010 13:01:17 GMT (100kb) Title: Electroweak Constraints on Warped Geometry in Five Dimensions and Beyond Authors: Paul R. Archer and Stephan J. Huber Categories: hep-ph hep-th Comments: 17 pages, 3 figures (references added) \\ ( http://arxiv.org/abs/1004.1159 , 100kb) ------------------------------------------------------------------------------ \\ arXiv:1005.3809 replaced with revised version Thu, 27 May 2010 11:44:04 GMT (47kb,D) Title: A "composite" scalar-vector system at the LHC Authors: Antonio E. C\'arcamo Hern\'andez and Riccardo Torre Categories: hep-ph Comments: 20 pages, 9 tables, 1 figure Report-no: IFUP-TH/2010-17 \\ ( http://arxiv.org/abs/1005.3809 , 47kb) ------------------------------------------------------------------------------ \\ arXiv:1005.4621 replaced with revised version Wed, 26 May 2010 21:18:07 GMT (49kb) Title: DDVCS on nucleons and nuclei Authors: B. Z. Kopeliovich, Ivan Schmidt, M. Siddikov Categories: hep-ph Comments: 11 pages, 4 figures. In version 2 a few references added Report-no: USM-TH-264 \\ ( http://arxiv.org/abs/1005.4621 , 49kb) ------------------------------------------------------------------------------ \\ arXiv:1005.4801 replaced with revised version Thu, 27 May 2010 11:41:09 GMT (32kb,D) Title: Associated scalar-vector production at the LHC within an effective Lagrangian approach Authors: Riccardo Torre Categories: hep-ph Comments: To appear in the Proceedings of IFAE2010 - Incontri di Fisica delle Alte Energie, Rome, Italy, 7-9 April 2010 Report-no: IFUP-TH/2010-18 \\ ( http://arxiv.org/abs/1005.4801 , 32kb) ------------------------------------------------------------------------------ \\ arXiv:1005.4851 replaced with revised version Thu, 27 May 2010 01:54:54 GMT (19kb) Title: Probing CPT violation in neutrino oscillation: A three flavor analysis Authors: Abhijit Samanta Categories: hep-ph Comments: 7 pages, 1 figure, typos corrected \\ ( http://arxiv.org/abs/1005.4851 , 19kb) ------------------------------------------------------------------------------ \\ arXiv:1005.4868 replaced with revised version Thu, 27 May 2010 08:04:49 GMT (91kb) Title: Constraints on a long-range spin-dependent interaction from precision atomic physics Authors: S. G. Karshenboim Categories: hep-ph physics.atom-ph Comments: Cross references to Arxiv are updated (arXiv:1005.4859, arXiv:1005.4872) \\ ( http://arxiv.org/abs/1005.4868 , 91kb) ------------------------------------------------------------------------------ \\ arXiv:1005.4872 replaced with revised version Thu, 27 May 2010 07:57:58 GMT (182kb) Title: Constraints on a long-range spin-independent interaction from precision atomic physics Authors: S. G. Karshenboim Categories: hep-ph physics.atom-ph Comments: A cross reference to Arxiv is updated (arXiv:1005.4859) \\ ( http://arxiv.org/abs/1005.4872 , 182kb) ------------------------------------------------------------------------------ \\ arXiv:1005.4875 replaced with revised version Thu, 27 May 2010 08:06:41 GMT (253kb) Title: HFS interval of the $2s$ state of hydrogen-like atoms and a constraint on a pseudovector boson with mass below $1\;$keV$/c^2$ Authors: S. G. Karshenboim Categories: hep-ph physics.atom-ph Comments: Cross references to Arxiv are updated (arXiv:1005.4859, arXiv:1005.4868) \\ ( http://arxiv.org/abs/1005.4875 , 253kb) ------------------------------------------------------------------------------ \\ arXiv:1005.4879 (*cross-listing*) replaced with revised version Thu, 27 May 2010 12:12:51 GMT (200kb) Title: Non-relativistic contributions in order $\alpha^5m_\mu c^2$ to the Lamb shift in muonic hydrogen, deuterium and helium ion Authors: S.G. Karshenboim, V.G. Ivanov, E.Yu. Korzinin, V.A. Shelyuto Categories: physics.atom-ph hep-ph Comments: 4 pages, 3 figures; cross-refs upgraded \\ ( http://arxiv.org/abs/1005.4879 , 200kb) ------------------------------------------------------------------------------ \\ arXiv:1005.4880 (*cross-listing*) replaced with revised version Thu, 27 May 2010 12:20:20 GMT (98kb) Title: Contribution of Light-by-Light Scattering to Energy Levels of Light Muonic Atoms Authors: S.G. Karshenboim, E.Yu. Korzinin, V.G. Ivanov, V.A. Shelyuto Categories: physics.atom-ph hep-ph Comments: 6 pages, 5 figures; cross-refs upgraded \\ ( http://arxiv.org/abs/1005.4880 , 98kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- 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. Author self-submissions are exceedingly preferred. E-mail submissions have been discontinued in favor of better support for Web submissions. See http://arXiv.org/help/uploads