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Magnetic shift of the chemical freezeout and electric charge fluctuations

Authors
  • Fukushima, Kenji
  • Hidaka, Yoshimasa
Type
Preprint
Publication Date
Jun 11, 2016
Submission Date
May 06, 2016
Identifiers
arXiv ID: 1605.01912
Source
arXiv
License
Yellow
External links

Abstract

We discuss the effect of a strong magnetic field on the chemical freezeout points in the ultrarelativistic heavy-ion collision. As a result of the inverse magnetic catalysis or the magnetic inhibition, the crossover onset to hot and dense matter out of quarks and gluons should be shifted to a lower temperature. To quantify this shift we employ the hadron resonance gas model and an empirical condition for the chemical freezeout. We point out that the charged particle abundances are significantly affected by the magnetic field so that the electric charge fluctuation is largely enhanced especially at high baryon density. The charge conservation partially cancels the enhancement but our calculation shows that the electric charge fluctuation and the charge chemical potential could serve as a magnetometer. We find that the fluctuation exhibits a crossover behavior rapidly increased for eB >~ (0.4GeV)^2, while the charge chemical potential has better sensitivity to the magnetic field.

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