Hadronic fluctuations at the QCD phase transition

By S. Ejiri, F. Karsch, K. Redlich. 2005

196 citations recorded by the source corpus.

We discuss the properties of hadronic fluctuations, i.e., fluctuations of net quark and isospin numbers as well as electric charge, in the vicinity of the QCD transition in isospin-symmetric matter at vanishing quark chemical potential. We analyse second- and fourth-order cumulants of these fluctuations and argue that the ratio of quartic and quadratic cumulants reflects the relevant degrees of freedom that carry the quark number, isospin or charge, respectively. In the hadronic phase we find that an enhancement of charge fluctuations arises from contributions of doubly charged hadrons to the thermodynamics. The rapid suppression of fluctuations seen in the high-temperature phase suggests that in the QGP, net quark number and electric charge are predominantly carried by quasi-particles, with the quantum numbers of quarks.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/617d935ce585dd65290688f0b043597568fe30f8

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Nuclear and High Energy Physics

Citations in the corpus

Polyakov loop modeling for hot QCD (2017, background): “The so-called kurtosis defined by the ratio, χ4 /χ B 2 , is known as a good probe of the deconfinement transition; as we demonstrate below, at zero chemical potential, it reflects the quark content of physical degrees of freedom that carry the baryon number [193, 194].”
QCD at finite temperature and chemical potential from Dyson–Schwinger equations (2018, background): “Provided the chemical freeze-out in heavy ion collisions is sufficiently close to the chiral critical line and the CEP, it has been suggested [21, 22, 119–123] that fluctuations”