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Nuclear Theory·nucl-th

Thursday·September 29, 2016

8 papers—4 primary·4 cross-listed

All8Primary4Cross-lists4
  1. 01

    Comprehending particle production at RHIC and LHC energies using global measurements

    Sadhana Dash🇮🇳 · Basanta K. Nandi🇮🇳 · Ranjit Nayak🇮🇳 · Ashutosh Kumar Pandey🇮🇳 · Priyanka Sett🇮🇳

    The centrality dependence of the charged-particle multiplicity densities () and transverse energy densities () are investigated using the two-component Glauber approach for broad range of energies in heavy ion collisions at RHIC and LHC. A comprehensive study shows that the data is well described within the framework of two component model which includes the contribution of "soft processes" and "hard processes" for different centrality classes and energies. The data at two different energies are compared by means of the ratio of (and ) to see the interplay of energy and -scaling.

    nucl-thhep-phMod.Phys.Lett.A(2017)·1 citation
  2. 02

    Dependence of fusion on isospin dynamics

    K. Godbey · A.S. Umar · C. Simenel

    We introduce a new microscopic approach to calculate the dependence of fusion barriers and cross-sections on isospin dynamics. The method is based on the time-dependent Hartree-Fock theory and the isoscalar and isovector properties of the energy density functional (EDF). The contribution to the fusion barriers originating from the isoscalar and isovector parts of the EDF is calculated. It is shown that for non-symmetric systems the isovector dynamics influence the sub-barrier fusion cross-sections. For most systems this results in an enhancement of the sub-barrier cross-sections, while for others we observe differing degrees of hindrance. We use this approach to provide an explanation of recently measured fusion cross sections which show a surprising enhancement at low energies for the system Ca+Sn as compared to the more neutron-rich system Ca+Sn, and discuss the dependence of sub-barrier fusion cross-sections on transfer.

    nucl-thPRC(2017)·47 citations
  3. 03

    Tidal deformability of neutron and hyperon star with relativistic mean field equations of state

    Bharat Kumar🇮🇳 · S. K. Biswal🇮🇳 · S. K. Patra🇮🇳

    We systematically study the tidal deformability for neutron and hyperon stars using relativistic mean field (RMF) equations of state (EOSs). The tidal effect plays an important role during the early part of the evolution of compact binaries. Although, the deformability associated with the EOSs has a small correction, it gives a clean gravitational wave signature in binary inspiral. These are characterized by various love numbers kl (l=2, 3, 4), that depend on the EOS of a star for a given mass and radius. The tidal effect of star could be efficiently measured through advanced LIGO detector from the final stages of inspiraling binary neutron star (BNS) merger.

    nucl-thPRC(2017)·71 citations
  4. 04

    Three-body system of

    Bingwei Long🇨🇳

    The existence of near-threshold charmed baryon implies that the pion and the lightest, isospin- charmed baryon interact very strongly at extremely low energies. Using the two-flavor version of heavy hadron chiral perturbation theory, I explore the direct consequences of this strong force by investigating whether the can trap two very soft pions to form any visible hadronic states. The answer is positive. It is found without tuning any free parameters or ultraviolet cutoff that the state in question, with quantum numbers , presents itself as a resonance pole only a few MeVs away from the threshold. Subleading corrections are estimated with power-counting arguments, and the smallness of pion momenta is found to facilitate the reliability of the analysis. Because of its proximity in mass, this excited resonance is speculated to be related to the broad resonance labeled as .

    nucl-thhep-exhep-ph3 citations

Affiliations

first authorsco-authorsvia INSPIRE