Net baryon fluctuations from a crossover equation of state

. We have constructed an equation of state which smoothly interpolates between an excluded-volume hadron resonance gas at low energy density to a plasma of quarks and gluons at high energy density. This crossover equation of state agrees very well with lattice calculations at both zero and nonzero b...

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Bibliographic Details
Published inThe European physical journal. A, Hadrons and nuclei Vol. 52; no. 8; pp. 1 - 5
Main Authors Kapusta, J., Albright, M., Young, C.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.08.2016
Springer Nature B.V
Subjects
Baryons
Chemical potential
Crossovers
Equations of state
Exploring strongly interacting matter at high densities - NICA White Paper
Flux density
Gluons
Hadrons
Heavy Ions
Kurtosis
Nuclear Fusion
Nuclear Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Regular Article - Theoretical Physics
Relativistic Heavy Ion Collider
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Summary:. We have constructed an equation of state which smoothly interpolates between an excluded-volume hadron resonance gas at low energy density to a plasma of quarks and gluons at high energy density. This crossover equation of state agrees very well with lattice calculations at both zero and nonzero baryon chemical potential. We use it to compute the variance, skewness, and kurtosis of fluctuations of baryon number, and compare to measurements of proton number fluctuations in central Au-Au collisions as measured by the STAR Collaboration in a beam energy scan at the Relativistic Heavy-Ion Collider. The crossover equation of state can reproduce the data if the fluctuations are frozen out at temperatures well below than the average chemical freeze-out.
ISSN:1434-6001
1434-601X
DOI:10.1140/epja/i2016-16250-7