Universality, the QCD critical and tricritical point, and the quark number susceptibility
By Y. Hatta, T. Ikeda. 2002
225 citations recorded by the source corpus.
The quark number susceptibility near the QCD critical end-point (CEP), the tricritical point (TCP) and the O(4) critical line at finite temperature and quark chemical potential is investigated. Based on the universality argument and numerical model calculations we propose a possibility that the hidden tricritical point strongly affects the critical phenomena around the critical end-point. We made a semi-quantitative study of the quark number susceptibility near CEP/TCP for several quark masses on the basis of the Cornwall-Jackiw-Tomboulis (CJT) potential for QCD in the improved-ladder approximation. The results show that the susceptibility is enhanced in a wide region around CEP inside which the critical exponent gradually changes from that of CEP to that of TCP, indicating a crossover of different universality classes.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/069593f5c38cc867900b0755ff20bf0c187c700e
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In Nuclear and High Energy Physics
Citations in the corpus
- The phase diagram of dense QCD (2010, background): “If the chiral transition is of second order for the massless Nf = 2 case, the Z(2) chiral critical line meets themud = 0 axis at ms = mtri s (tricritical point) and changes its universality to O(4) for ms > mtri s [96].”
- A holographic critical point (2010, background): “abel Method Reference HB Hadronic Bootstrap [33] LTE Lattice Taylor Expansion [34] LR Lattice Reweighting [35], [36] RM Random Matrix [37] NJL Nambu{Jona-Lasinio [38],[39],[40] CJT Eective Potential [41] LSM Linear Sigma Model [39] CO Composite Operator [42], [43] In general, as heavy ion collisions”