Date: Thu, 27 Sep 18 00:20:37 GMT Subject: nucl-th daily 5 new + 2 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 25 Sep 18 18:00:00 GMT to Wed 26 Sep 18 18:00:00 GMT ------------------------------------------------------------------------------ \\ arXiv:1809.09653 Date: Tue, 25 Sep 2018 18:48:22 GMT (126kb) Title: Evolution of the moments of multiplicity distributions Authors: Radka Sochorova, Boris Tomasik, Marcus Bleicher Categories: nucl-th hep-ph nucl-ex Comments: 8 pages, 7 figures \\ Measured moments of the multiplicity distribution for a given sort of particles are used in the literature for the determination of the phase transition parameters of hot QCD matter in ultrarelativistic heavy-ion collisions. We argue that the subsequent cooling in the hadronic phase, however, may drive the multiplicity distribution out of equilibrium. We use a master equation for the description of the evolution of the multiplicity distribution to demonstrate how the different moments depart away from their equilibrium values. If such moments were measured and interpreted as if they were equilibrated, one would obtain different apparent temperatures from different moments. \\ ( https://arxiv.org/abs/1809.09653 , 126kb) ------------------------------------------------------------------------------ \\ arXiv:1809.09717 Date: Tue, 25 Sep 2018 20:54:33 GMT (33kb) Title: Representations of relativistic particles of arbitrary spin in Poincar\'e, Lorentz, and Euclidean covariant formulations of relativistic quantum mechanics Authors: W. N. Polyzou Categories: nucl-th hep-th Comments: 35 pages \\ Relativistic treatments of quantum mechanical systems are important for understanding hadronic structure and dynamics at sub-nucleon distance scales. Hadronic states in different inertial reference frames are needed to compute current matrix elements that probe hadronic structure and dynamics. Relativistic invariance is an important consideration as the resolution of the probe is increased. Many different treatments of relativistic dynamics are used in practice, including Poincar\'e covariant methods, Lorentz covariant methods, Euclidean covariant methods and methods based on quantum fields. Wave functions are typically matrix elements of interacting relativistic states in a basis of non-interacting relativistic states. The purpose of this work is to develop the relation between these different representations of relativistic states that are used in different applications from a unified point of view, starting with positive mass irreducible representations of the Poincar\'e group. \\ ( https://arxiv.org/abs/1809.09717 , 33kb) ------------------------------------------------------------------------------ \\ arXiv:1809.09772 Date: Wed, 26 Sep 2018 01:15:52 GMT (458kb) Title: Alleviating the inconsistencies in modelling decay of fissile compound nuclei Authors: Tathagata Banerjee, S. Nath, and Santanu Pal Categories: nucl-th Comments: 15 pages, 9 figures \\ This work attempts to overcome the existing inconsistencies in modelling decay of fissile nucleus by inclusion of important physical effects in the model and through a systematic analysis of a large set of data over a wide range of CN mass (ACN). The model includes shell effect in the level density (LD) parameter, shell correction in the fission barrier, effect of the orientation degree of freedom of the CN spin (Kor), collective enhancement of level density (CELD) and dissipation in fission. Input parameters are not tuned to reproduce observables from specific reaction(s) and the reduced dissipation coefficient is treated as the only adjustable parameter. Calculated evaporation residue (ER) cross sections, fission cross sections and particle, i.e. neutron, proton and alpha-particle, multiplicities are compared with data covering ACN = 156-248. The model produces reasonable fits to ER and fission excitation functions for all the reactions considered in this work. Pre-scission neutron multiplicities are underestimated by the calculation beyond ACN~200. An increasingly higher value of pre-saddle dissipation strength is required to reproduce the data with increasing ACN. Proton and alpha-particle multiplicities, measured in coincidence with both ERs and fission fragments, are in qualitative agreement with model predictions. The present work mitigates the existing inconsistencies in modelling statistical decay of the fissile CN to a large extent. \\ ( https://arxiv.org/abs/1809.09772 , 458kb) ------------------------------------------------------------------------------ \\ arXiv:1809.09786 Date: Wed, 26 Sep 2018 02:48:15 GMT (58kb) Title: Fully coupled-channel study of $K^-pp$ resonance in a chiral SU(3)-based $K^{bar}N$ potential Authors: Akinobu Dot\'e, Takashi Inoue and Takayuki Myo Categories: nucl-th nucl-ex Comments: 11 pages, 4 figures, 1 table, A plenary talk given at the 13th International Conference on Hypernuclear and Strange Particle Physics, June 24-29, 2018, Portsmouth, VA \\ Nuclear system with antikaons, so-called kaonic nuclei, has been a longstanding issue in strange nuclear physics and hadron physics, because they might have exotic nature; In particular, they could be a doorway to the dense matter due to the strong attraction between antikaon and nucleon. Among kaonic nuclei, the three-body system composed of two protons and a single $K^-$ meson, $K^-pp$, is the most essential. In this article, we will report on the recent situation of $K^-pp$ studies in both theoretical and experimental sides. Afterwards, we will explain our latest study of the $K^-pp$ with a fully coupled-channel complex scaling method (Full ccCSM) using a chiral SU(3)-based $\bar{K}N$(-$\pi Y$) potential. In Full ccCSM, the $K^-pp$ is completely treated as a resonant state of a $\bar{K}NN$-$\pi\Sigma N$-$\pi\Lambda N$ coupled-channel system. The energy dependence involved in the chiral potential is handled with a self-consistent calculation in which two extreme ansatzes are examined: field picture and particle picture. With our chiral SU(3)-based potential constrained by the precise data of kaonic hydrogen atom (SIDDHARTA experiment), the $K^-pp$ resonance is obtained as a shallowly bound state measured from the $\bar{K}NN$ threshold with a narrow width, if the field picture is employed in the calculation: the binding energy is $14-28$ MeV and half value of the mesonic decay width are $8-15$ MeV. On the other hand, if the particle picture is employed, it is found that the binding energy could be as large as about 50 MeV, even though such a chiral potential is used. Based on these results of Full ccCSM calculation, we have discussed on the possibility for kaonic nuclei to form a dense matter and on the latest experimental result reported by J-PARC E15 collaboration. \\ ( https://arxiv.org/abs/1809.09786 , 58kb) ------------------------------------------------------------------------------ \\ arXiv:1809.09980 Date: Tue, 25 Sep 2018 02:56:39 GMT (613kb) Title: Connection between asymptotic normalization coefficients and resonance widths of mirror states Authors: Akram Mukhamedzhanov Categories: nucl-th Comments: 19 pages, 10 figures. arXiv admin note: text overlap with arXiv:1209.2158 \\ Asymptotic normalization coefficients (ANCs) are fundamental nuclear constants playing important role in nuclear reactions, nuclear structure and nuclear astrophysics. In this paper a connection between ANCs and resonance widths of the mirror states is established. Using Pinkston-Satchler equation the ratio for resonance widths and ANCs of mirror nuclei is obtained in terms of the Wronskians from the radial overlap functions and regular solutions of the two-body Schr\"odinger equation with the short-range interaction excluded. This ratio allows one to use microscopic overlap functions for mirror nuclei in the internal region, where they are the most accurate, to correctly predict the ratio of the resonance widths and ANCs for mirror nuclei, which determine the amplitudes of the tails of the overlap functions. If the microscopic overlap functions are not available one can express the Wronskians for the resonances and mirror bound states in terms of the corresponding mirror two-body potential-model wave functions. A further simplification of the Wronskians ratio leads to the equation for the ratio of the resonance widths and mirror ANCs, which is expressed in terms of the ratio of the two-body Coulomb scattering wave functions at the resonance energy and at the binding energy [N. K. Timofeyuk, R. C. Johnson, and A. M. Mukhamedzhanov, Phys. Rev. Lett. {\bf 91}, 232501 (2003]. In this paper calculations of the ratios of resonance widths and mirror ANCs for different nuclei are presented. From this ratio one can determine the resonance width if the mirror ANC is known and vice versa. Comparison with available experimental ratios are done. \\ ( https://arxiv.org/abs/1809.09980 , 613kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:1809.09635 (*cross-listing*) Date: Tue, 25 Sep 2018 18:05:19 GMT (124kb,D) Title: The Proton Radius Puzzle- Why We All Should Care Authors: Gerald A. Miller Categories: physics.atom-ph hep-ph nucl-ex nucl-th Comments: Talk Presented at CIPANP2018, 8 pages, Latex. 2 pdf figures. Report No: CIPANP2018-Miller Report-no: NT@UW-18-11 \\ The status of the proton radius puzzle (as of the date of the Confer- ence) is reviewed. The most likely potential theoretical and experimental explanations are discussed. Either the electronic hydrogen experiments were not sufficiently accurate to measure the proton radius, the two- photon exchange effect was not properly accounted for, or there is some kind of new physics. I expect that upcoming experiments will resolve this issue within the next year or so.Ta \\ ( https://arxiv.org/abs/1809.09635 , 124kb) ------------------------------------------------------------------------------ \\ arXiv:1809.10066 (*cross-listing*) Date: Wed, 26 Sep 2018 15:33:09 GMT (102kb,D) Title: Inhomogeneous chiral phases away from the chiral limit Authors: Michael Buballa and Stefano Carignano Categories: hep-ph nucl-th Comments: 9 pages, 4 figures \\ The effect of explicit chiral-symmetry breaking on inhomogeneous chiral phases is studied within a Nambu-Jona-Lasinio model with nonzero current quark mass. Generalizing an earlier result obtained in the chiral limit, we show within a Ginzburg-Landau analysis that the critical endpoint of the first-order chiral phase boundary between two homogeneous phases gets replaced by a "pseudo-Lifshitz point" when the possibility of inhomogeneous order parameters is considered. Performing a stability analysis we also show that the unstable mode along the phase boundary is in the scalar but not in the pseudoscalar channel, suggesting that modulations which contain pseudoscalar condensates, like a generalized dual chiral density wave, are disfavored against purely scalar ones. Numerically we find that the inhomogeneous phase shrinks as one moves away from the chiral limit, but survives even at significantly large values of the current quark mass. \\ ( https://arxiv.org/abs/1809.10066 , 102kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:1805.10507 (*cross-listing*) replaced with revised version Wed, 26 Sep 2018 14:03:55 GMT (187kb) Title: Nucleon charges with dynamical overlap fermions Authors: Nodoka Yamanaka, Shoji Hashimoto, Takashi Kaneko, Hiroshi Ohki (JLQCD Collaboration) Categories: hep-lat hep-ex hep-ph nucl-th Comments: 39 pages, 17 figures Report-no: KEK-CP-365 Journal-ref: Phys. Rev. D 98, 054516 (2018) DOI: 10.1103/PhysRevD.98.054516 \\ ( https://arxiv.org/abs/1805.10507 , 187kb) ------------------------------------------------------------------------------ \\ arXiv:1809.03092 replaced with revised version Wed, 26 Sep 2018 15:32:11 GMT (2621kb) Title: Squeezed back-to-back correlations of $K^+$$K^-$ in d+Au collisions at $\sqrt{s_{NN}}=200$ GeV and Au+Au collisions at $\sqrt{s_{NN}}=62.4$ GeV Authors: Yong Zhang and Jing Yang Categories: nucl-th nucl-ex \\ ( https://arxiv.org/abs/1809.03092 , 2621kb) ------------------------------------------------------------------------------ \\ arXiv:1809.07869 replaced with revised version Tue, 25 Sep 2018 22:23:10 GMT (12kb) Title: Current Status of Very-Large-Basis Hamiltonian Diagonalizations for Nuclear Physics Authors: Calvin W. Johnson Categories: nucl-th Comments: To be published in the proceedings of Thirteenth Conference on the Intersections of Particle and Nuclear Physics, Indian Wells, CA, May 28--June 3, 2018; updated reference \\ ( https://arxiv.org/abs/1809.07869 , 12kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- 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/