Date: Fri, 29 Oct 10 00:06:33 GMT Subject: nucl-th daily 2 new + 8 crosses received by eprepget ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ Send any comments regarding submissions directly to submitter. ------------------------------------------------------------------------------ Archives at http://arxiv.org/ To unsubscribe, e-mail To: nucl-th@arXiv.org, Subject: cancel ------------------------------------------------------------------------------ received by eprepget from Wed 27 Oct 10 20:00:00 GMT to Thu 28 Oct 10 20:00:00 GMT ------------------------------------------------------------------------------ \\ arXiv:1010.5856 Date: Thu, 28 Oct 2010 04:27:46 GMT (463kb) Title: Role of isospin physics in supernova matter and neutron stars Authors: Bharat K. Sharma, Subrata Pal Categories: nucl-th Comments: 11 pages, 7 figures, RevTex \\ We investigate the liquid-gas phase transition of hot protoneutron stars shortly after their birth following supernova explosion and the composition and structure of hyperon-rich (proto)neutron stars within a relativistic mean-field model where the nuclear symmetry energy has been constrained from the measured neutron skin thickness of finite nuclei. Light clusters are abundantly formed with increasing temperature well inside the neutrino-sphere for an uniform supernova matter. Liquid-gas phase transition is found to suppress the cluster yield within the coexistence phase as well as decrease considerably the neutron-proton asymmetry over a wide density range. We find symmetry energy has a modest effect on the boundaries and the critical temperature for the liquid-gas phase transition, and the composition depends more sensitively on the number of trapped neutrinos and temperature of the protoneutron star. The influence of hyperons in the dense interior of stars makes the overall equation of state soft. However, neutrino trapping distinctly delays the appearance of hyperons due to abundance of electrons. We also find that a softer symmetry energy further makes the onset of hyperon less favorable. The resulting structures of the (proto)neutron stars with hyperons and with liquid-gas phase transition are discussed. \\ ( http://arxiv.org/abs/1010.5856 , 463kb) ------------------------------------------------------------------------------ \\ arXiv:1010.5961 Date: Thu, 28 Oct 2010 13:32:24 GMT (50kb) Title: Semi-Classical Description of the Average Pairing Properties in Nuclei Authors: X. Vinas, P. Schuck and M. Farine Categories: nucl-th \\ We present a new semi-classical theory for describing pairing in finite Fermi systems. It is based in taking the $\hbar \to 0$, i.e. Thomas-Fermi, limit of the gap equation written in the basis of the mean field (weak coupling). In addition to the position dependence of the Fermi momentum, the size dependence of the matrix elements of the pairing force is also taken into account in this theory. An example typical for the nuclear situation shows the improvement of this new approach over the standard Local Density Approximation. We also show that if in this approach some shell fluctuations are introduced in the level density, the arch structure displayed by the quantal gaps along isotopic chains is almost recovered. We also point out that in heavy drip line nuclei pairing is strongly reduced. \\ ( http://arxiv.org/abs/1010.5961 , 50kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:1010.5515 (*cross-listing*) Date: Tue, 26 Oct 2010 20:50:48 GMT (117kb,D) Title: Deconfinement in Yang-Mills theory through toroidal compactification with deformation Authors: Dusan Simic and Mithat Unsal Categories: hep-th hep-lat hep-ph nucl-th Comments: 25 pgaes, 4 figures \\ We introduce field theory techniques through which the deconfinement transition of four-dimensional Yang-Mills theory can be moved to a semi-classical domain where it becomes calculable using two-dimensional field theory. We achieve this through a double- trace deformation of toroidally compactified Yang-Mills theory on R2 \times S1_L \times S1_{\beta}. At large N, fixed-L, and arbitrary {\beta}, the thermodynamics of the deformed theory is equivalent to that of ordinary Yang-Mills theory at leading order in the large N expansion. At fixed-N, small L and a range of {\beta}, the deformed theory maps to a two-dimensional theory with electric and magnetic (order and disorder) perturbations, analogs of which appear in planar spin-systems and statistical physics. We show that in this regime the deconfinement transition is driven by the competition between electric and magnetic perturbations in this two-dimensional theory. This appears to support the scenario proposed by Liao and Shuryak regarding the magnetic component of the quark-gluon plasma at RHIC. \\ ( http://arxiv.org/abs/1010.5515 , 117kb) ------------------------------------------------------------------------------ \\ arXiv:1010.5790 (*cross-listing*) Date: Wed, 27 Oct 2010 20:00:15 GMT (53kb) Title: The Massive Pulsar PSR J1614-2230: Linking Quantum Chromodynamics, Gamma-ray Bursts, and Gravitational Wave Astronomy Authors: Feryal Ozel, Dimitrios Psaltis, Scott Ransom, Paul Demorest, Mark Alford Categories: astro-ph.HE gr-qc nucl-th Comments: Accepted for publication in ApJL \\ The recent measurement of the Shapiro delay in the radio pulsar PSR J1614-2230 yielded a mass of 1.97 +/- 0.04 M_sun, making it the most massive pulsar known to date. Its mass is high enough that, even without an accompanying measurement of the stellar radius, it has a strong impact on our understanding of nuclear matter, gamma-ray bursts, and the generation of gravitational waves from coalescing neutron stars. This single high mass value indicates that a transition to quark matter in neutron-star cores can occur at densities comparable to the nuclear saturation density only if the quarks are strongly interacting and are color superconducting. We further show that a high maximum neutron-star mass is required if short duration gamma-ray bursts are powered by coalescing neutron stars and, therefore, this mechanism becomes viable in the light of the recent measurement. Finally, we argue that the low-frequency (<= 500 Hz) gravitational waves emitted during the final stages of neutron-star coalescence encode the properties of the equation of state because neutron stars consistent with this measurement cannot be centrally condensed. This will facilitate the measurement of the neutron star equation of state with Advanced LIGO/Virgo. \\ ( http://arxiv.org/abs/1010.5790 , 53kb) ------------------------------------------------------------------------------ \\ arXiv:1010.5827 (*cross-listing*) Date: Wed, 27 Oct 2010 23:38:05 GMT (4201kb,D) Title: Heavy quarkonium: progress, puzzles, and opportunities Authors: N. Brambilla, S. Eidelman, B. K. Heltsley, R. Vogt, G. T. Bodwin, E. Eichten, A. D. Frawley, A. B. Meyer, R. E. Mitchell, V. Papadimitriou, P. Petreczky, A. A. Petrov, P. Robbe, A. Vairo, A. Andronic, R. Arnaldi, P. Artoisenet, G. Bali, A. Bertolin, D. Bettoni, J. Brodzicka, G. E. Bruno, A. Caldwell, J. Catmore, C.-H. Chang, K.-T. Chao, E. Chudakov, P. Cortese, P. Crochet, A. Drutskoy, U. Ellwanger, P. Faccioli, A. Gabareen Mokhtar, X. Garcia i Tormo, C. Hanhart, F. A. Harris, D. M. Kaplan, S. R. Klein, H. Kowalski, J.-P. Lansberg, E. Levichev, V. Lombardo, C. Lourenco, F. Maltoni, A. Mocsy, R. Mussa, F. S. Navarra, M. Negrini, M. Nielsen, S. L. Olsen, P. Pakhlov, G. Pakhlova, K. Peters, A. D. Polosa, W. Qian, J.-W. Qiu, G. Rong, M. A. Sanchis-Lozano, E. Scomparin, P. Senger, F. Simon, S. Stracka, et al. (5 additional authors not shown) Categories: hep-ph hep-ex hep-lat nucl-ex nucl-th Comments: 181 pages, 112 figures. Submitted to European Physics Journal C. Editors: N. Brambilla, S. Eidelman, B. K. Heltsley, R. Vogt. Section Coordinators: G. T. Bodwin, E. Eichten, A. D. Frawley, A. B. Meyer, R. E. Mitchell, V. Papadimitriou, P. Petreczky, A. A. Petrov, P. Robbe, A. Vairo Report-no: TUM-EFT 11/10, CLNS 10/2066, ANL-HEP-PR-10-44, Alberta Thy 11-10, CP3-10-37, FZJ-IKP-TH-2010-24, INT-PUB-10-059 \\ A golden age for heavy quarkonium physics dawned a decade ago, initiated by the confluence of exciting advances in quantum chromodynamics (QCD) and an explosion of related experimental activity. The early years of this period were chronicled in the Quarkonium Working Group (QWG) CERN Yellow Report (YR) in 2004, which presented a comprehensive review of the status of the field at that time and provided specific recommendations for further progress. However, the broad spectrum of subsequent breakthroughs, surprises, and continuing puzzles could only be partially anticipated. Since the release of the YR, the BESII program concluded only to give birth to BESIII; the $B$-factories and CLEO-c flourished; quarkonium production and polarization measurements at HERA, JLab, and the Tevatron matured; and heavy-ion collisions at RHIC have opened a window on the deconfinement regime. All these experiments leave legacies of quality, precision, and unsolved mysteries for quarkonium physics, and therefore beg for continuing investigations. The plethora of newly-found quarkonium-like states unleashed a flood of theoretical investigations into new forms of matter such as quark-gluon hybrids, mesonic molecules, and tetraquarks. Measurements of the spectroscopy, decays, production, and in-medium behavior of c\bar{c}, b\bar{b}, and b\bar{c} bound states have been shown to validate some theoretical approaches to QCD and highlight lack of quantitative success for others. The intriguing details of quarkonium suppression in heavy-ion collisions that have emerged from RHIC have elevated the importance of separating hot- and cold-nuclear-matter effects in quark-gluon plasma studies. This review systematically addresses all these matters and concludes by prioritizing directions for ongoing and future efforts. \\ ( http://arxiv.org/abs/1010.5827 , 4201kb) ------------------------------------------------------------------------------ \\ arXiv:1010.5865 (*cross-listing*) Date: Thu, 28 Oct 2010 05:38:36 GMT (127kb) Title: Comparison between LQCD and PNJL model at finite chemical potentials Authors: Yuji Sakai, Takahiro Sasaki, Hiroaki Kouno, Masanobu Yahiro Categories: hep-ph hep-lat nucl-th Comments: Presented at 28th International Symposium on Lattice Field Theory (Lattice 2010), Villasimius, Sardinia, Italy, 14-19 June, 2010 \\ Lattice QCD has the sign problem at real quark chemical potential. There are some regions with no sign problem; one is the imaginary quark chemical potential region and the others are the real and imaginary isospin chemical potential regions. We show that the Polyakov-loop extended Nambu-Jona-Lasinio (PNJL) model can reproduce LQCD data in the regions. We also determine the model parameters from the data and predict the QCD phase diagram in the real quark chemical potential region. \\ ( http://arxiv.org/abs/1010.5865 , 127kb) ------------------------------------------------------------------------------ \\ arXiv:1010.5980 (*cross-listing*) Date: Thu, 28 Oct 2010 14:36:18 GMT (2322kb) Title: Holographic Nucleons Authors: Ismail Zahed Categories: hep-ph hep-th nucl-th Comments: 18 pages; 11 figures \\ Recent developments in holography have provided a new vista to the nucleon composition. A strongly coupled core nucleon tied with vector mesons emerge in line with the Cheshire cat principle. The cat is found to hide in the holographic direction. We discuss the one, two and many baryon problem in this context and point at the striking similarities between the holographic results and recent lattice simulations at strong coupling. \\ ( http://arxiv.org/abs/1010.5980 , 2322kb) ------------------------------------------------------------------------------ \\ arXiv:1010.5984 (*cross-listing*) Date: Thu, 28 Oct 2010 14:54:05 GMT (59kb) Title: Dileptons and Photons at RHIC Authors: Ismail Zahed Categories: hep-ph nucl-ex nucl-th Comments: 7 pages; 4 figures \\ Electromagnetic emission in the form of photons or dileptons provide important information on the onset and evolution of a heavy ion collision at ultrarelativistic energies. We briefly summarize the theoretical assessments of the thermalized electromagnetic emissivities from a hot partonic and hadronic medium, and compare them to current experiments at collider energies. \\ ( http://arxiv.org/abs/1010.5984 , 59kb) ------------------------------------------------------------------------------ \\ arXiv:1010.6018 (*cross-listing*) Date: Thu, 28 Oct 2010 17:00:21 GMT (43kb) Title: Scalar mesons in a finite volume Authors: V. Bernard (Orsay IPN), M. Lage (Bonn U. HISKP), U.-G. Mei{\ss}ner (Bonn U. HISKP & Juelich Forschungszentrum), A. Rusetsky (Bonn U. HISKP) Categories: hep-lat hep-ph nucl-th Comments: 18 pages, 3 figures Report-no: Preprint HISKP-TH-10/21, FZJ-IKP(TH)-2010-18 \\ Using effective field theory methods, we discuss the extraction of the mass and width of the scalar mesons f0(980) and a0(980) from the finite-volume spectrum in lattice QCD. In particular, it is argued that the nature of these states can be studied by invoking twisted boundary conditions, as well as investigating the quark mass dependence of the spectrum. \\ ( http://arxiv.org/abs/1010.6018 , 43kb) ------------------------------------------------------------------------------ \\ arXiv:1010.6062 (*cross-listing*) Date: Thu, 28 Oct 2010 19:49:15 GMT (21kb) Title: Exotic dynamically generated baryons with C$=-$1 Authors: D.Gamermann, C.Garc\'ia-Recio, J.Nieves, L.L.Salcedo, L.Tolos Categories: hep-ph nucl-th Comments: 5 pages. Proceedings for Chiral10 workshop, Valencia, June 21-24 2010 \\ We follow a model based on the SU(8) symmetry for the interaction of mesons with baryons. The model treats on an equal footing the pseudo-scalars and the vector mesons, as required by heavy quark symmetry. The T-matrix calculated within an unitary scheme in coupled channels has poles which are interpreted as baryonic resonances. \\ ( http://arxiv.org/abs/1010.6062 , 21kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:1003.1091 (*cross-listing*) replaced with revised version Thu, 28 Oct 2010 15:47:01 GMT (40kb) Title: Divergence-type 2+1 dissipative hydrodynamics applied to heavy-ion collisions Authors: J. Peralta-Ramos and E. Calzetta Categories: hep-ph nucl-th Comments: v3: 29 pages, 12 figures. Accepted in Phys. Rev. C \\ ( http://arxiv.org/abs/1003.1091 , 40kb) ------------------------------------------------------------------------------ \\ arXiv:1003.4444 replaced with revised version Wed, 27 Oct 2010 21:38:39 GMT (82kb) Title: Precision calculation of the pi^- deuteron scattering length and its impact on threshold pi-N scattering Authors: V. Baru, C. Hanhart, M. Hoferichter, B. Kubis, A. Nogga, D. R. Phillips Categories: nucl-th hep-ph nucl-ex Comments: 6 pages, 2 figures. Discussion of several points expanded, references added in this version, which will appear in Physics Letters B Report-no: FZJ-IKP-TH-2010-05, HISKP-TH-10/06 DOI: 10.1016/j.physletb.2010.10.028 \\ ( http://arxiv.org/abs/1003.4444 , 82kb) ------------------------------------------------------------------------------ \\ arXiv:1006.3499 replaced with revised version Thu, 28 Oct 2010 08:13:37 GMT (28kb) Title: Transverse electron scattering response function of $^3$He with $\Delta$-isobar degrees of freedom Authors: Luping Yuan, Victor D. Efros, Winfried Leidemann, and Edward L. Tomusiak Categories: nucl-th Comments: 21 pages,4 figures, a replacement of arXiv:1006.3499v1, additional calculations at different kinematics \\ ( http://arxiv.org/abs/1006.3499 , 28kb) ------------------------------------------------------------------------------ \\ arXiv:1008.4473 replaced with revised version Thu, 28 Oct 2010 09:42:55 GMT (120kb) Title: Effective field theories for baryons with two- and three-heavy quarks Authors: Antonio Vairo Categories: nucl-th hep-lat hep-ph Comments: 7 pages, 1 figure; published version Report-no: TUM-EFT 12/10 \\ ( http://arxiv.org/abs/1008.4473 , 120kb) ------------------------------------------------------------------------------ \\ arXiv:1010.2760 (*cross-listing*) replaced with revised version Thu, 28 Oct 2010 17:29:01 GMT (201kb,D) Title: Bulk spectral functions in single and multi-scalar gravity duals Authors: Todd Springer, Charles Gale, and Sangyong Jeon Categories: hep-th hep-ph nucl-th Comments: 10 pages + appendices, 2 figures. In version 2, typos fixed and some text modified in Sec. V; conclusions unchanged \\ ( http://arxiv.org/abs/1010.2760 , 201kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- 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