Date: Thu, 29 Nov 12 01:08:42 GMT Subject: nucl-th daily 1 new + 3 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 Tue 27 Nov 12 21:00:00 GMT to Wed 28 Nov 12 21:00:00 GMT ------------------------------------------------------------------------------ \\ arXiv:1211.6696 Date: Wed, 28 Nov 2012 18:28:57 GMT (40kb,D) Title: The interplay of nuclear and Coulomb effects in proton breakup from exotic nuclei Authors: Ravinder Kumar (1,2), Angela Bonaccorso (1) ((1) INFN, Sez. di Pisa, Pisa, Italy, (2) Dep. of Physics, Deenbandhu Chhoturam Univ. of Science and Technology, Murthal, Sonepat, Haryana, India) Categories: nucl-th nucl-ex Comments: 4 pages,4 figures, 2 tables. Accepted for publication on Phys.Rev. C, Rapid Communication \\ This paper gives new insight to the study of dynamical effects in proton breakup as compared to neutron breakup from a weakly bound state in an exotic nucleus. Following our recent work [Ravinder Kumar and Angela Bonaccorso, Phys. Rev. C84 014613 (2011)] there has been some discussion in the literature [B. Paes, J. Lubiana, P.R.S. Gomes, V. Guimar\~aes, Nucl. Phys. A890 1 (2012); Y. Kucuk and A. M. Moro, Phys. Rev. C86 034601 (2012)], thus in order to clarify and asses quantitatively which mechanism would dominate measured observables, we study here several reaction mechanisms separately but also their total including interference. These mechanisms are: the recoil effect of the core-target Coulomb potential which we distinguish from the direct proton-target Coulomb potential and nuclear breakup, which consists of stripping and diffraction. Direct Coulomb breakup typically gives cross sections about an order of magnitude larger than the recoil term and the amount of nuclear diffraction vs. Coulomb depends on the target. Thus for each mechanism the absolute values of breakup cross sections and parallel momentum distributions for 8B and 17F projectiles calculated on a light and a heavy target in a range of intermediate incident energies (40-80A.MeV) are presented. Furthermore we study in detail the interference among the two Coulomb effects and nuclear diffraction. The calculation of the direct and recoil Coulomb effects separately and of their interference is the new and most relevant aspect of this paper. \\ ( http://arxiv.org/abs/1211.6696 , 40kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:1211.6637 (*cross-listing*) Date: Wed, 28 Nov 2012 15:45:08 GMT (210kb) Title: Efimov Physics in small bosonic clusters Authors: M. Gattobigio, A. Kievsky, and M. Viviani Categories: physics.atm-clus cond-mat.other nucl-th physics.atom-ph Comments: Presented at the 20th International IUPAP Conference on Few-Body Problems in Physics, 20 - 25 August, 2012, Fukuoka, Japan \\ We study small clusters of bosons, $A=2,3,4,5,6$, characterized by a resonant interaction. Firstly, we use a soft-gaussian interaction that reproduces the values of the dimer binding energy and the atom-atom scattering length obtained with LM2M2 potential, a widely used $^4$He-$^4$He interaction. We change the intensity of the potential to explore the clusters' spectra in different regions with large positive and large negative values of the two-body scattering length and we report the clusters' energies on Efimov plot, which makes the scale invariance explicit. Secondly, we repeat our calculation adding a repulsive three-body force to reproduce the trimer binding energy. In all the region explored, we have found that these systems present two states, one deep and one shallow close to the $A-1$ threshold, and scale invariance has been investigated for these states. The calculations are performed by means of Hyperspherical Harmonics basis set. \\ ( http://arxiv.org/abs/1211.6637 , 210kb) ------------------------------------------------------------------------------ \\ arXiv:1211.6665 (*cross-listing*) Date: Wed, 28 Nov 2012 17:12:39 GMT (135kb) Title: Spontaneous parity violation in extreme conditions: an effective lagrangian analysis Authors: A. A. Andrianov, V. A. Andrianov, D. Espriu Categories: hep-ph hep-th nucl-th Comments: 29 pages. arXiv admin note: text overlap with arXiv:0709.0049 Report-no: ICCUB-12-472 \\ We investigate how large baryon densities (and possibly high temperatures) may induce spontaneous parity violation in the meson sector of QCD. The analysis at intermediate energy scales is done by using an extended $\sigma$-model lagrangian that includes two scalar and two pseudoscalar multiplets and fulfills low-energy QCD constraints. We elaborate on a novel mechanism of parity breaking previously proposed by the authors based on the interplay between lightest and heavier meson condensates, which therefore cannot be realized in the simplest $\sigma$ model. We emphasize that the mechanism proposed here differs from the old idea of pion condensation advocated originally by Migdal. The results are relevant for an idealized homogeneous and infinite nuclear (quark) matter where the influence of density can be examined with the help of a constant chemical potential. The model is able to describe satisfactorily the first-order phase transition to stable nuclear matter, and predicts a second-order phase transition to a state where parity is spontaneously broken. We argue that the parity breaking phenomenon is quite generic when a large enough chemical potential is present. Current quark masses are explicitly taken into account in this work and shown not to change the general conclusions. We expect that our approach will be adequate for dense nuclear matter of a few normal densities where quark percolation does not yet play a significant role. \\ ( http://arxiv.org/abs/1211.6665 , 135kb) ------------------------------------------------------------------------------ \\ arXiv:1211.6714 (*cross-listing*) Date: Wed, 28 Nov 2012 19:32:25 GMT (1119kb) Title: Global variables and correlations: Summary of the results presented at the Quark Matter 2012 conference Authors: Boris Hippolyte and Dirk Rischke Categories: nucl-ex hep-ex hep-ph nucl-th Comments: 8 pages, 6 figures; proceedings of the summary plenary talk given at Quark Matter 2012, August 13-18, 2012, Washington DC \\ In these proceedings, we highlight recent developments from both theory and experiment related to the global description of matter produced in ultra-relativistic heavy-ion collisions as presented during the Quark Matter 2012 conference. \\ ( http://arxiv.org/abs/1211.6714 , 1119kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:1204.5746 (*cross-listing*) replaced with revised version Wed, 28 Nov 2012 01:34:16 GMT (2370kb,D) Title: Precision Thrust Cumulant Moments at N^3LL Authors: Riccardo Abbate, Michael Fickinger, Andre H. Hoang, Vicent Mateu, Iain W. Stewart Categories: hep-ph hep-ex nucl-th Comments: 23 pages, 16 figures. v2: minor changes, references added, some data added. v3: minor modifications to match published version Report-no: MIT--CTP 4343; IFIC/12-02; UWThPh-2012-9; LPN12-023; INT-PUB-12-006 \\ ( http://arxiv.org/abs/1204.5746 , 2370kb) ------------------------------------------------------------------------------ \\ arXiv:1208.1328 replaced with revised version Wed, 28 Nov 2012 05:31:43 GMT (116kb,D) Title: Structure and rotations of the Hoyle state Authors: Evgeny Epelbaum, Hermann Krebs, Timo L\"ahde, Dean Lee, Ulf-G. Mei{\ss}ner Categories: nucl-th astro-ph.SR hep-lat nucl-ex Comments: 4 pages, 3 figures, 4 tables, version to be published in Physical Review Letters \\ ( http://arxiv.org/abs/1208.1328 , 116kb) ------------------------------------------------------------------------------ \\ arXiv:1210.5887 (*cross-listing*) replaced with revised version Wed, 28 Nov 2012 13:32:19 GMT (551kb,D) Title: Baryon electric dipole moments from strong CP violation Authors: Feng-Kun Guo, Ulf-G. Mei{\ss}ner Categories: hep-ph hep-lat nucl-th Comments: 30 pages, 8 figures, to appear in JHEP \\ ( http://arxiv.org/abs/1210.5887 , 551kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- 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