Forward-backward multiplicity fluctuation and longitudinal harmonics in high-energy nuclear collisions
Abstract
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 +more »
- Authors:
-
- 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
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States). Relativistic Heavy Ion Collider (RHIC)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1340375
- Alternate Identifier(s):
- OSTI ID: 1247898
- Report Number(s):
- BNL-112526-2016-JA
Journal ID: ISSN 2469-9985; R&D Project: PO 004; KB0202012
- Grant/Contract Number:
- SC00112704; SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review C
- Additional Journal Information:
- Journal Volume: 93; Journal Issue: 4; Journal ID: ISSN 2469-9985
- Publisher:
- APS
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Relativistic Heavy Ion Collider
Citation Formats
Jia, Jiangyong, Radhakrishnan, Sooraj, and Zhou, Mingliang. Forward-backward multiplicity fluctuation and longitudinal harmonics in high-energy nuclear collisions. United States: N. p., 2016.
Web. doi:10.1103/PhysRevC.93.044905.
Jia, Jiangyong, Radhakrishnan, Sooraj, & Zhou, Mingliang. Forward-backward multiplicity fluctuation and longitudinal harmonics in high-energy nuclear collisions. United States. https://doi.org/10.1103/PhysRevC.93.044905
Jia, Jiangyong, Radhakrishnan, Sooraj, and Zhou, Mingliang. Mon .
"Forward-backward multiplicity fluctuation and longitudinal harmonics in high-energy nuclear collisions". United States. https://doi.org/10.1103/PhysRevC.93.044905. https://www.osti.gov/servlets/purl/1340375.
@article{osti_1340375,
title = {Forward-backward multiplicity fluctuation and longitudinal harmonics in high-energy nuclear collisions},
author = {Jia, Jiangyong and Radhakrishnan, Sooraj and Zhou, Mingliang},
abstractNote = {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.},
doi = {10.1103/PhysRevC.93.044905},
journal = {Physical Review C},
number = 4,
volume = 93,
place = {United States},
year = {Mon Apr 18 00:00:00 EDT 2016},
month = {Mon Apr 18 00:00:00 EDT 2016}
}
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Works referencing / citing this record:
Measurement of forward-backward multiplicity correlations in lead-lead, proton-lead, and proton-proton collisions with the ATLAS detector
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