Nuclear Theory·nucl-th

Friday·November 3, 2017

9 papers—4 primary·5 cross-listed

01
Reply to Comment on "Six-body bound system calculations in the case of effective Alpha-core structure"
Eskandar Ahmadi Pouya · Ali Akbar Rajabi
The present paper is provided in response to the comment of M. R. Hadizadeh et.al on our original paper Six-body bound system calculations in the case of effective Alpha-core structure [Eur. Phys. J. Plus (2016) 131: 240].In this paper we have presented our clarifications on their arguments about of the accuracy of the procedure of the calculations. In this paper our arguments turn out to be very efficient mainly discussed from the authors misunderstanding of the issues discussed in the original paper. In fact, their comment aims to exaggeratedly show that our paper is poor,but our following statements demonstrate that their comment is misleading and consequently unacceptable.
nucl-th0 citations
02
Investigating the quark flavor dependence of the chiral magnetic effect with a multiphase transport model
Ling Huang🇨🇳 · Chun-Wang Ma🇨🇳 · Guo-Liang Ma🇨🇳
Because the properties of the QCD phase transition and the chiral magnetic effect (CME) depend on the number of quark flavors ( $N_{f}$ ) and quark mass, relativistic heavy-ion collisions provide a natural environment to investigate the flavor features if quark deconfinement occurs. We introduce an initial two-flavor or three-flavor dipole charge separation into a multiphase transport (AMPT) model to investigate the flavor dependence of the CME. By taking advantage of the recent ALICE data of charge azimuthal correlations with identified hadrons, we attempt to disentangle two-flavor and three-flavor CME scenarios in Pb+Pb collisions at 2.76 TeV. We find that the experimental data show a certain potential to distinguish the two scenarios, therefore we further suggest to collect more data to clarify the possible flavor dependence in future experiments.
nucl-thhep-phnucl-exPRC(2018)·9 citations
03
Neutrino-Oxygen CC0 $π$ scattering in the SuSAv2-MEC model
G.D. Megias🇪🇸 · M.B. Barbaro🇮🇹 · J.A. Caballero🇪🇸 · J.E. Amaro🇪🇸 · T.W. Donnelly🇺🇸 · I. Ruiz Simo🇪🇸 · J. W. Van Orden🇺🇸
We present the predictions of the SuSAv2-MEC model for the double differential charged-current muonic neutrino (antineutrino) cross section on water for the T2K neutrino (antineutrino) beam. We validate our model by comparing with the available inclusive electron scattering data on oxygen and compare our predictions with the recent T2K $ν_{μ}$ - $^{16}$ O data, finding good agreement at all kinematics. We show that the results are very similar to those obtained for $ν_{μ} -^{12}$ C scattering, except at low energies, and we comment on the origin of this difference. A factorized spectral function model of $^{16}$ O is also included for purposes of comparison.
nucl-thhep-phJ.Phys.G(2019)·51 citations
04
Correlation between heavy flavour production and multiplicity in pp and p-Pb collisions at high energy in the multi-pomeron exchange model
Grigory Feofilov🇷🇺 · Vladimir Kovalenko🇷🇺 · Andrei Puchkov (Saint Petersburg State University)🇷🇺
The multiplicity dependence of heavy flavour production in pp-collisions at LHC energies is studied in the framework of the multi-pomeron exchange model. The model is introducing the string-string interaction collectivity effects in pp collisions, which modifies multiplicity and transverse momenta, leading to the non-trivial mean pt vs. multiplicity (<pt>_Nch - Nch) correlation. The string collectivity strength parameter is fixed by experimental data on multiplicity and transverse momentum correlation in a wide energy range (from ISR to LHC). The particles discrimination is implemented according to Schwinger mechanism taking into account the strong decays of hadron resonances. We demonstrate, that the faster-than-linear growth of the open charm production with the event charged particle multiplicity, observed in experimental pp high energy collisions, can be explained by the modification of the string tension due to the increasing overlap and interaction of quark-gluon strings. The model is extended for p-A interactions and the calculations for p-Pb collisions are performed.
nucl-thhep-phEPJ Web Conf.(2018)·14 citations
05
Lattice calculation of hadronic tensor of the nucleon
Jian Liang🇺🇸 · Keh-Fei Liu🇺🇸 · Yi-Bo Yang🇺🇸
We report an attempt to calculate the deep inelastic scattering structure functions from the hadronic tensor calculated on the lattice. We used the Backus-Gilbert reconstruction method to address the inverse Laplace transformation for the analytic continuation from the Euclidean to the Minkowski space.
↳ hep-lathep-phnucl-thEPJ Web Conf.(2018)·31 citations
06
Imprints of neutrino-pair flavor conversions on nucleosynthesis in ejecta from neutron-star merger remnants
Meng-Ru Wu🇹🇼 · Irene Tamborra🇩🇰 · Oliver Just🇩🇪 · Hans-Thomas Janka🇩🇪
The remnant of neutron star mergers is dense in neutrinos. By employing inputs from one hydrodynamical simulation of a binary neutron star merger remnant with a black hole of $3 M_{⊙}$ in the center, dimensionless spin parameter $0.8$ and an accretion torus of $0.3 M_{⊙}$ , the neutrino emission properties are investigated as the merger remnant evolves. Initially, the local number density of $ν ˉ_{e}$ is larger than that of $ν_{e}$ everywhere above the remnant. Then, as the torus approaches self-regulated equilibrium, the local abundance of neutrinos overcomes that of antineutrinos in a funnel around the polar region. The region where the fast pairwise flavor conversions can occur shrinks accordingly as time evolves. Still, we find that fast flavor conversions do affect most of the neutrino-driven ejecta. Assuming that fast flavor conversions lead to flavor equilibration, a significant enhancement of nuclei with mass numbers $A > 130$ is found as well as a change of the lanthanide mass fraction by more than a factor of a thousand. Our findings hint towards a potentially relevant role of neutrino flavor oscillations for the prediction of the kilonova (macronova) lightcurves and motivate further work in this direction.
↳ astro-ph.HEhep-phnucl-thPRD(2017)·135 citations
07
Sequential Strangeness Freeze-out
Rene Bellwied🇺🇸
I will describe the latest results from lattice QCD pertaining to a potential flavour hierarchy in the hadronic freeze-out from the QCD crossover region. I will compare these results to a variety of improved hadronic resonance gas calculations and to experimental data of fluctuations of net-charge, net-proton and net-kaon multiplicity distributions, which serve as a proxy for the susceptibilities of conserved quantum numbers on the lattice. I will conclude that there is intriguing evidence for a flavour dependent freeze-out, and I will suggest expansions to the experimental program at RHIC and the LHC that could potentially demonstrate the impact of a flavour separation during hadronization.
↳ nucl-exnucl-thEPJ Web Conf.(2018)·16 citations
08
In-medium properties of pseudoscalar $D_{s}$ and $B_{s}$ mesons
Rahul Chhabra🇮🇳 · Arvind Kumar🇮🇳
We calculate the shift in masses and decay constants of $D_{s} (1968)$ and $B_{s} (5370)$ mesons in hot and dense asymmetric strange hadronic matter using QCD sum rules and chiral SU(3) model. In-medium strange quark condensates $⟨ s ˉ s ⟩_{ρ_{B}}$ , and gluon condensates $⟨ \frac{α _{s}}{π} G^{a}_{μν} G^{a}^{μν} ⟩_{ρ_{B}}$ to be used in the QCD sum rules for pseudoscalar $D_{s}$ and $B_{s}$ mesons are calculated using chiral SU(3) model. As an application of our present work, we calculate the in-medium decay widths of the excited (c $s ˉ$ ) states $D_{s}^{*} (2715)$ and $D_{s}^{*} (2860)$ decaying to ( $D_{s} (1968)$ , $η$ ) mesons. The medium effects in their decay widths are incorporated through the mass modification of the $D_{s} (1968)$ and $η$ mesons. Results of the present investigation may be helpful to understand the possible outcomes of the future experiments like CBM and PANDA under the FAIR facility.
↳ hep-phnucl-thEPJC(2017)·23 citations
09
Valence Quark and Gluon Distributions of Kaon from J/Psi Production
Jen-Chieh Peng🇺🇸 · Wen-Chen Chang🇹🇼 · Stephane Platchkov🇫🇷 · Takahiro Sawada🇺🇸
The only experimental information on the parton distribution of kaons was obtained from the scarce kaon-induced Drell-Yan cross section data. From these data, evidence for a valence $u$ quark distribution of kaon softer than that of pion was found. We study the feasibility to extract kaon's valence quark distribution via the existing kaon-induced J/psi production data. We compare the NA3 data on the K- / pi- and K+ / pi+ ratios for J/psi production on a platinum target with theoretical calculations based on the color-evaporation model. We show that the NA3 data on J/psi production provide an independent evidence for a valence $u$ quark distribution softer in kaon than in pion. The data also suggest different gluon distributions for kaon and pion.
↳ hep-phnucl-th13 citations

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