Measuring the Speed of Sound Using Cumulants of Baryon Number

Journal Article · Tue Dec 13 23:00:00 EST 2022 · Acta Physica Polonica. Series B, Proceedings Supplement

DOI:https://doi.org/10.5506/aphyspolbsupp.16.1-a48· OSTI ID:2229718

Sorensen, Agnieszka ^[1]; Oliinychenko, Dmytro ^[2]; McLerran, Larry ^[2]; Koch, Volker ^[3]

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1. University of Washington, Seattle, WA (United States); University of Washington
2. University of Washington, Seattle, WA (United States)
3. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Here, we show that the values of the first three cumulants of the baryon number distribution can be used to calculate the isothermal speed of sound and its logarithmic derivative with respect to the baryon-number density. We discuss applications of this result to heavy-ion collision experiments and address possible challenges, including effects due to baryon-number conservation, differences between proton and baryon cumulants, and the influence of finite-number statistics on fluctuation observables in both ex periment and hadronic transport simulations. In particular, we investigate the relation between quantities calculated in infinite, continuous matter, and observables obtained in simulations using a finite number of particles.

• Research Organization: University of Washington, Seattle, WA (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: FG02-00ER41132
• OSTI ID: 2229718
• Alternate ID(s): OSTI ID: 2234029
• Journal Information: Acta Physica Polonica. Series B, Proceedings Supplement, Journal Name: Acta Physica Polonica. Series B, Proceedings Supplement Journal Issue: 1 Vol. 16; ISSN 1899-2358
• Publisher: Jagiellonian University
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS