Speaker
Dr
Sayantan Sharma
(Bielefeld University)
Description
In the discussion of hadronization at or close to the freeze-out
curve, statistical (hadron resonance gas) models play an important
role. In particular in the charmonium sector, regeneration models
are considered which rely on the fact that charmonium states can
form again already at temperatures well above the QCD crossover
or hadronization temperature. An important ingredient in these
considerations is the regeneration or hadronization of open charm
states.
In this talk we report on a lattice QCD analysis of correlations of
open strangeness [1] and charm [2] with other conserved quantum numbers
like the net baryon number and electric charge. We analyze the temperature
range in which an uncorrelated hadron resonance gas (HRG) provides an
adequate description of such correlations. This limits the range of
validity of HRG based thermodynamics in open flavor channels and
provides an estimate for the melting temperature of heavy-light hadrons.
We find that the strange or charmed HRG description breaks down at
or very close to the QCD crossover temperature.
References:
[1] 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
(Bielefeld-BNL collaboration)
"Strangeness at high temperatures: from hadrons to quarks"
Phys. Rev. Lett. 111, 082301 (2013).
[2] Bielefeld-BNL collaboration, to be published.
| On behalf of collaboration: | [Other] |
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Author
Dr
Sayantan Sharma
(Bielefeld University)
