PaperPanorama
FAQ

Nuclear Theory·nucl-th

Friday·August 16, 2019

9 papers—6 primary·3 cross-listed

All9Primary6Cross-lists3
  1. 07

    [Submitted on 11 Jun 2019] (cross-list from hep-th)

    Some Features of Semiclassical Chiral Transport in Rotating Frames

    O.F. Dayi🇹🇷 · E. Kilincarslan🇹🇷

    Semiclassical chiral kinetic theories in the presence of electromagnetic fields as well as vorticity can be constructed by means of some different relativistic or nonrelativistic approaches. To cover the noninertial features of rotating frames one can start from the modified quantum kinetic equation of Wigner function in Minkowski spacetime. It provides a relativistic chiral transport equation whose nonrelativistic limit yields a consistent three-dimensional kinetic theory which does not depend explicitly on spatial coordinates. Recently a chiral transport equation in curved spacetime has been proposed and its nonrelativistic limit in rotating coordinates was considered in the absence of electromagnetic fields. We show that the modified theory can be extended to curved spacetime. The related particle current density and chiral transport equation for an inertial observer in the rotating frame are derived. A novel three-dimensional chiral kinetic transport equation is established by inspecting the nonrelativistic limit of the curved spacetime approach in the rotating frame for a comoving observer in the presence of electromagnetic fields. It explicitly depends on spatial coordinates. We prove that it is consistent with the chiral anomaly, chiral magnetic and vortical effects.

    Comments:
    Some comments and references added. Typos corrected
    Subjects:
    High Energy Physics — Theory (hep-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1906.04504 [pdf]
    PRD(2019)·6 citations
  2. 08

    [Submitted on 14 Aug 2019] (cross-list from hep-ph)

    Normalized symmetric cumulants as a measure of QCD phase transition: a viscous hydrodynamic study

    Ashutosh Dash🇮🇳 · Victor Roy🇮🇳

    Finding the existence and the location of the QCD critical point is one of the main goals of the RHIC beam energy scan program. To make theoretical predictions and corroborate with the experimental data requires modeling the space-time evolution of the matter created in heavy-ion collisions by dynamical models such as the relativistic hydrodynamics with an appropriate Equation of State (EoS). In the present exploratory study, we use a viscous 2+1 dimensional event-by-event (e-by-e) hydrodynamic code at finite baryon densities with two different EoSs (i) Lattice QCD + HRG with a crossover transition and (ii) EoS with a first-order phase transition to studying the normalized symmetric cumulants of charged pions . We show that the normalized symmetric cumulants can differentiate the two EoSs while all other conditions remain the same. The conclusion does not change for various initial conditions and shear viscosity. This indicates that these observables can be used to gain information about the QCD EoS from experimental data and can be used as an EoS meter.

    Comments:
    Substantial changes from v2. Results with finite viscosity has been added
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1908.05292 [pdf]
    2 citations
  3. 09

    [Submitted on 14 Aug 2019] (cross-list from hep-ph)

    Strong decays of the latest LHCb pentaquark candidates in hadronic molecule pictures

    Yong-Hui Lin🇨🇳 · Bing-Song Zou🇨🇳

    We investigate the observed pentaquark candidates , and from the latest LHCb measurement, as well as four possible spin partners in the system predicted from the heavy quark spin symmetry with the hadronic molecule scenarios. Similar to the previous calculation on and , the partial widths of all the allowed decay channels for these states are estimated with the effective Lagrangian method. The cutoff dependence of our numerical results are also presented. Comparing with the experimental widths, our results show that , and can be described well with the spin-parity--, - and - molecule pictures, respectively.

    Comments:
    13 pages,8 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1908.05309 [pdf]
    PRD(2019)·108 citations

Affiliations

first authorsco-authorsvia INSPIRE