Signatures of the Tricritical Point in QCD

Details Signatures of the Tricritical Point in QCD Signatures of the Tricritical Point in QCD

1998-06-01

arxiv.org/abs/hep-ph/9806219v2

Phys.Rev.Lett. 81 (1998) 4816-4819

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages (published version)

Scientific paper

10.1103/PhysRevLett.81.4816

Several approaches to QCD with two massless quarks at finite temperature T and baryon chemical potential mu suggest the existence of a tricritical point on the boundary of the phase with spontaneously broken chiral symmetry. In QCD with massive quarks there is then a critical point at the end of a first order transition line. We discuss possible experimental signatures of this point, which provide information about its location and properties. We propose a combination of event-by-event observables, including suppressed fluctuations in T and mu and, simultaneously, enhanced fluctuations in the multiplicity of soft pions.

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