Effects of nonvanishing net charge on balance functions and their integrals

Journal Article · 30 May 2023 · Physical Review. C

DOI: https://doi.org/10.1103/physrevc.107.054915 · OSTI ID:2280399

Pruneau, Claude  ^[1]; Gonzalez, Victor  ^[1]; Hanley, Brian  ^[1]; Marin, Ana  ^[2]; Basu, Sumit ^[3]

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1. Wayne State University, Detroit, MI (United States)
2. GSI-Darmstadt (Germany). ExtreMe Matter Inst. (EMMI)
3. Lund University (Sweden)

We investigate the impact of nonvanishing net charge in collision systems on measurements of balance functions and their integrals. We show that the nominal balance function definition yields integrals that deviate from unity because of the nonvanishing net charge. However, the integral of unified balance functions is shown to appropriately converge to unity when measured in a sufficiently wide experimental acceptance. We furthermore explore the rate of convergence of unified balance functions integrals and study distortions imparted on the shape of balance functions when measurements are carried out in limited transverse momentum (p_T) and rapidity (y) acceptances, such as those featured by experiments at the Large Hadron Collider or the Relativistic Heavy Ion Collider. We show that the shape and integral of unified balance functions may be strongly biased by reductions in the rapidity and transverse momentum acceptances of existing experiments.

• Research Organization: Wayne State Univ., Detroit, MI (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• Grant/Contract Number: FG02-92ER40713
• OSTI ID: 2280399
• Alternate ID(s): OSTI ID: 2419390
• Journal Information: Physical Review. C, Vol. 107, Issue 5; ISSN 2469-9985
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English