Forward-backward multiplicity fluctuation and longitudinal harmonics in high-energy nuclear collisions
- Stony Brook Univ., NY (United States). Department of Chemistry; Brookhaven National Lab. (BNL), Upton, NY (United States). Physics Department
- Stony Brook Univ., NY (United States). Department of Chemistry
In this paper, an analysis method is proposed to study the forward-backward (FB) multiplicity fluctuation in high-energy nuclear collisions, built on the earlier work of Bzdak and Teaney [Phys. Rev. C 87, 024906 (2013)]. The method allows the decomposition of the centrality dependence of average multiplicity from the dynamical event-by-event (EbyE) fluctuation of multiplicity in pseudorapidity. Application of the method to AMPT (A Multi-Phase Transport model) and HIJING (Heavy Ion Jet INteraction Generator) models shows that the long-range component of the FB correlation is captured by a few longitudinal harmonics, with the first component driven by the asymmetry in the number of participating nucleons in the two colliding nuclei. The higher-order longitudinal harmonics are found to be strongly damped in AMPT compared to HIJING, due to weaker short-range correlations as well as the final-state effects present in the AMPT model. Two-particle pseudorapidity correlation reveals interesting charge-dependent short-range structures that are absent in HIJING model. Lastly, the proposed method opens an avenue to elucidate the particle production mechanism and early time dynamics in heavy-ion collisions. Future analysis directions and prospects of using the pseudorapidity correlation function to understand the centrality bias in p + p, p + A, and A + A collisions are discussed.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States). Relativistic Heavy Ion Collider (RHIC)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- SC00112704; SC0012704
- OSTI ID:
- 1340375
- Alternate ID(s):
- OSTI ID: 1247898
- Report Number(s):
- BNL-112526-2016-JA; R&D Project: PO 004; KB0202012
- Journal Information:
- Physical Review C, Vol. 93, Issue 4; ISSN 2469-9985
- Publisher:
- APSCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Measurement of forward-backward multiplicity correlations in lead-lead, proton-lead, and proton-proton collisions with the ATLAS detector
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text | January 2017 |
Measurement of forward-backward multiplicity correlations in lead-lead, proton-lead and proton-proton collisions with the ATLAS detector | text | January 2016 |
Constraints on rapidity-dependent initial conditions from charged particle pseudorapidity densities and two-particle correlations | text | January 2016 |
Dynamical initial state model for relativistic heavy-ion collisions | text | January 2017 |
Centrality fluctuations in heavy-ion collisions | text | January 2018 |
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