Mott dissociation of pions and kaons in hot, dense quark matter

D. Blaschke, A. Dubinin, A. Radzhabov, and A. Wergieluk
Phys. Rev. D 96, 094008 – Published 14 November 2017

Abstract

We describe the Mott dissociation of pions and kaons within a Beth-Uhlenbeck approach based on the Polyakov-loop improved Nambu–Jona-Lasinio model, which allows for a unified description of bound, resonant and scattering states. Within this model we evaluate the temperature and chemical potential dependent modification of the phase shifts both in the pseudoscalar and scalar isovector meson channels for Nf=2+1 quark flavors. We show that the character change of the pseudoscalar bound states to resonances in the continuum at the Mott transition temperature is signaled by a jump of the phase shift at the threshold from π to zero, in accordance with the Levinson theorem. In particular, we demonstrate the importance of accounting for the scattering continuum states, which ensures that the total phase shift in each of the meson channels vanishes at high energies, thus eliminating mesonic correlations from the thermodynamics at high temperatures. In this way, we prove that the present approach provides a unified description of the transition from a meson gas to a quark-gluon plasma. We discuss the occurrence of an anomalous mode for mesons composed of quarks with unequal masses which is particularly pronounced for K+ and κ+ states at finite densities a a possible mechanism to explain the “horn” effect for the K+/π+ ratio in heavy-ion collisions.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
4 More
  • Received 3 September 2016

DOI:https://doi.org/10.1103/PhysRevD.96.094008

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Particles & Fields

Authors & Affiliations

D. Blaschke1,2,3,*, A. Dubinin1,4,†, A. Radzhabov5,‡, and A. Wergieluk6,§

  • 1Institute for Theoretical Physics, University of Wroclaw, 50-204 Wroclaw, Poland
  • 2Bogoliubov Laboratory for Theoretical Physics, JINR Dubna, 141980 Dubna, Russia
  • 3National Research Nuclear University (MEPhI), 115409 Moscow, Russia
  • 4Marian Smoluchowski Institute of Physics, Jagellonian University Cracow, 30-348 Cracow, Poland
  • 5Matrosov Institute for System Dynamics and Control Theory, Irkutsk 664033, Russia
  • 6Department of Physics and Astronomy, University of California, Los Angeles, California 90095-1547, USA

  • *blaschke@ift.uni.wroc.pl
  • aleksandr.dubinin@ift.uni.wroc.pl
  • aradzh@icc.ru
  • §a.wergieluk@gmail.com

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 96, Iss. 9 — 1 November 2017

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×