Strangeness at High Temperatures: From Hadrons to Quarks

A. Bazavov, H.-T. Ding, P. Hegde, O. Kaczmarek, F. Karsch, E. Laermann, Y. Maezawa, Swagato Mukherjee, H. Ohno, P. Petreczky, C. Schmidt, S. Sharma, W. Soeldner, and M. Wagner
Phys. Rev. Lett. 111, 082301 – Published 23 August 2013

Abstract

Appropriate combinations of up to fourth order cumulants of net strangeness fluctuations and their correlations with net baryon number and electric charge fluctuations, obtained from lattice QCD calculations, have been used to probe the strangeness carrying degrees of freedom at high temperatures. For temperatures up to the chiral crossover, separate contributions of strange mesons and baryons can be well described by an uncorrelated gas of hadrons. Such a description breaks down in the chiral crossover region, suggesting that the deconfinement of strangeness takes place at the chiral crossover. On the other hand, the strangeness carrying degrees of freedom inside the quark gluon plasma can be described by a weakly interacting gas of quarks only for temperatures larger than twice the chiral crossover temperature. In the intermediate temperature window, these observables show considerably richer structures, indicative of the strongly interacting nature of the quark gluon plasma.

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  • Received 3 May 2013

DOI:https://doi.org/10.1103/PhysRevLett.111.082301

© 2013 American Physical Society

Authors & Affiliations

A. Bazavov1, H.-T. Ding1,2, P. Hegde3, O. Kaczmarek4, F. Karsch1,4, E. Laermann4, Y. Maezawa1, Swagato Mukherjee1, H. Ohno4, P. Petreczky1, C. Schmidt4, S. Sharma4, W. Soeldner5, and M. Wagner4

  • 1Physics Department, Brookhaven National Laboratory, Upton, New York 11973, USA
  • 2Physics Department, Columbia University, New York, New York 10027, USA
  • 3Department of Physics R518, High Energy Physics Lab, National Taiwan University, Taipei 10617, Taiwan
  • 4Fakultät für Physik, Universität Bielefeld, D-33615 Bielefeld, Germany
  • 5Institut für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany

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Issue

Vol. 111, Iss. 8 — 23 August 2013

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