Deciphering the RΨm correlator in search for the chiral magnetic effect in relativistic heavy ion collisions

Feng, Yicheng; Zhao, Jie; Xu, Hao-jie; Wang, Fuqiang

doi:10.1103/physrevc.103.034912

Title: Deciphering the $R_{Ψ_{m}}$ correlator in search for the chiral magnetic effect in relativistic heavy ion collisions

Abstract

The chiral magnetic effect (CME) is extensively studied in heavy-ion collisions at the BNL Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). An azimuthal correlator called $R_{Ψ_{m}}$ was proposed to measure the CME. By observing the same $R_{Ψ_{2}}$ and $R_{Ψ_{3}}$ (convex) distributions from A Multi-Phase Transport (ampt) model, by contrasting data and model as well as large and small systems and by event shape engineering (ESE), a recent preprint (arXiv:2006.04251v1) from STAR suggests that the $R_{Ψ_{m}}$ observable is sensitive to the CME signal and relatively insensitive to backgrounds, and their Au + Au data are inconsistent with known background contributions. Our ampt results contradict those from a recent preprint by STAR. Our toy model simulations demonstrate that $R_{Ψ_{2}}$ is sensitive to both the CME signal and physics backgrounds. Toy model simulations of isobar collisions show similar centrality dependence and magnitudes for the relative $R_{Ψ_{2}}$ strengths as well as the relative Δ γ strengths. We conclude that $R_{Ψ_{2}}$ and the inclusive Δ γ are essentially the same.

Authors:

^[1];

^[2];

^[3]

Purdue Univ., West Lafayette, IN (United States)
Huzhou Univ. (China)
Purdue Univ., West Lafayette, IN (United States); Huzhou Univ. (China)

Publication Date:: Mon Mar 01 00:00:00 EST 2021

Research Org.:: Purdue Univ., West Lafayette, IN (United States)

Sponsoring Org.:: USDOE Office of Science (SC); National Natural Science Foundation of China (NSFC)

OSTI Identifier:: 1851772

Grant/Contract Number:: SC0012910; 11905059; 12035006; 12047568; 12075085

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review. C

Additional Journal Information:: Journal Volume: 103; Journal Issue: 3; Journal ID: ISSN 2469-9985

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats


                    Feng, Yicheng, Zhao, Jie, Xu, Hao-jie, and Wang, Fuqiang. Deciphering the RΨm correlator in search for the chiral magnetic effect in relativistic heavy ion collisions.  United States: N. p., 2021. 
Web.  doi:10.1103/physrevc.103.034912.

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                    Feng, Yicheng, Zhao, Jie, Xu, Hao-jie, & Wang, Fuqiang. Deciphering the RΨm correlator in search for the chiral magnetic effect in relativistic heavy ion collisions.  United States.  https://doi.org/10.1103/physrevc.103.034912

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                    Feng, Yicheng, Zhao, Jie, Xu, Hao-jie, and Wang, Fuqiang. Mon .  
"Deciphering the RΨm correlator in search for the chiral magnetic effect in relativistic heavy ion collisions".  United States.  https://doi.org/10.1103/physrevc.103.034912.  https://www.osti.gov/servlets/purl/1851772.

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@article{osti_1851772,

  title        = {Deciphering the RΨm correlator in search for the chiral magnetic effect in relativistic heavy ion collisions},

  author       = {Feng, Yicheng and Zhao, Jie and Xu, Hao-jie and Wang, Fuqiang},

  abstractNote = {The chiral magnetic effect (CME) is extensively studied in heavy-ion collisions at the BNL Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). An azimuthal correlator called RΨm was proposed to measure the CME. By observing the same RΨ2 and RΨ3 (convex) distributions from A Multi-Phase Transport (ampt) model, by contrasting data and model as well as large and small systems and by event shape engineering (ESE), a recent preprint (arXiv:2006.04251v1) from STAR suggests that the RΨm observable is sensitive to the CME signal and relatively insensitive to backgrounds, and their Au + Au data are inconsistent with known background contributions. Our ampt results contradict those from a recent preprint by STAR. Our toy model simulations demonstrate that RΨ2 is sensitive to both the CME signal and physics backgrounds. Toy model simulations of isobar collisions show similar centrality dependence and magnitudes for the relative RΨ2 strengths as well as the relative Δ γ strengths. We conclude that RΨ2 and the inclusive Δ γ are essentially the same.},

  doi          = {10.1103/physrevc.103.034912},

  journal      = {Physical Review. C},

  number       = 3,

  volume       = 103,

  place        = {United States},

  year         = {Mon Mar 01 00:00:00 EST 2021},

  month        = {Mon Mar 01 00:00:00 EST 2021}

}

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Title: Deciphering the R Ψ m correlator in search for the chiral magnetic effect in relativistic heavy ion collisions

Abstract

Citation Formats

New correlator to detect and characterize the chiral magnetic effect journal, June 2018

Observation of charge-dependent azimuthal correlations and possible local strong parity violation in heavy-ion collisions journal, May 2010

Isolating the chiral magnetic effect from backgrounds by pair invariant mass journal, February 2019

Resonance decay effects on anisotropy parameters journal, September 2004

Vacuum stability and vacuum excitation in a spin-0 field theory journal, April 1974

Measurement of charge multiplicity asymmetry correlations in high-energy nucleus-nucleus collisions at s N N = 200 GeV journal, April 2014

A novel invariant mass method to isolate resonance backgrounds from the chiral magnetic effect journal, February 2019

Measurements of dielectron production in Au + Au collisions at s N N = 200 GeV from the STAR experiment journal, August 2015

Examination of the observability of a chiral magnetically driven charge-separation difference in collisions of the Ru 44 96 + Ru 44 96 and Zr 40 96 + Zr 40 96 isobars at energies available at the BNL Relativistic Heavy Ion Collider journal, December 2018

Remarks on possible local parity violation in heavy ion collisions journal, March 2010

Azimuthal anisotropy in Au+Au collisions at s NN = 200 GeV journal, July 2005

Review of Particle Physics journal, August 2014

Charge dependent particle correlations motivated by chiral magnetic effect and chiral vortical effect journal, January 2017

New method for the experimental study of topological effects in the quark-gluon plasma journal, January 2011

Chiral magnetic effect search in p+Au, d+Au and Au+Au collisions at RHIC journal, January 2018

Challenges in flow background removal in search for the chiral magnetic effect journal, May 2017

Azimuthal Anisotropy of π 0 Production in Au + Au Collisions at s N N = 200 GeV : Path-Length Dependence of Jet Quenching and the Role of Initial Geometry journal, September 2010

Constraining the Chiral Magnetic Effect with charge-dependent azimuthal correlations in Pb-Pb collisions at $$ \sqrt{s_{\mathrm{NN}}} $$ = 2.76 and 5.02 TeV journal, September 2020

Fluctuations of charge separation perpendicular to the event plane and local parity violation in s NN = 200 GeV Au + Au collisions at the BNL Relativistic Heavy Ion Collider journal, December 2013

Charge separation relative to the reaction plane in Pb-Pb collisions at s N N = 2.76 TeV journal, January 2013

Anomalous chiral transport in heavy ion collisions from Anomalous-Viscous Fluid Dynamics journal, July 2018

Identified Particle Distributions in p p and Au + Au Collisions at s N N = 200 GeV journal, March 2004

A sensitivity study of the primary correlators used to characterize chiral-magnetically-driven charge separation journal, October 2020

Methods for analyzing anisotropic flow in relativistic nuclear collisions journal, September 1998

Constraints on the chiral magnetic effect using charge-dependent azimuthal correlations in p Pb and PbPb collisions at the CERN Large Hadron Collider journal, April 2018

Responses of the chiral-magnetic-effect–sensitive sine observable to resonance backgrounds in heavy-ion collisions journal, September 2018

Varying the chiral magnetic effect relative to flow in a single nucleus-nucleus collision journal, July 2018

Charge conservation at energies available at the BNL Relativistic Heavy Ion Collider and contributions to local parity violation observables journal, January 2011

Importance of Isobar Density Distributions on the Chiral Magnetic Effect Search journal, July 2018

The effects of topological charge change in heavy ion collisions: “Event by event and violation” journal, May 2008

Systematic measurements of identified particle spectra in pp , d + Au , and Au + Au collisions at the STAR detector journal, March 2009

Beam-Energy Dependence of Charge Separation along the Magnetic Field in Au + Au Collisions at RHIC journal, July 2014

ρ 0 Production and Possible Modification in A u + A u and p + p Collisions at s N N = 200 G e V journal, March 2004

Azimuthal angle dependence of the charge imbalance from charge conservation effects journal, March 2018

Constraining the magnitude of the Chiral Magnetic Effect with Event Shape Engineering in Pb–Pb collisions at s NN = 2.76 TeV journal, February 2018

Azimuthal Charged-Particle Correlations and Possible Local Strong Parity Violation journal, December 2009

Measurements of the chiral magnetic effect with background isolation in 200 GeV Au+Au collisions at STAR journal, February 2019

Possibility of Spontaneous Parity Violation in Hot QCD journal, July 1998

Parton energy loss in heavy-ion collisions via direct-photon and charged-particle azimuthal correlations journal, September 2010

Parity violation in hot QCD: How to detect it journal, November 2004

Re-examining the premise of isobaric collisions and a novel method to measure the chiral magnetic effect journal, February 2019

Search for CME in U+U and Au+Au collisions in STAR with different approaches of handling backgrounds journal, January 2021

Strong P, CP, T violations in heavy-ion collisions journal, December 1985

Multiphase transport model for relativistic heavy ion collisions journal, December 2005

Suppressed π 0 Production at Large Transverse Momentum in Central A u + A u Collisions at s N N = 200 G e V journal, August 2003

Observation of Charge-Dependent Azimuthal Correlations in p − Pb Collisions and Its Implication for the Search for the Chiral Magnetic Effect journal, March 2017

Quantifying the chiral magnetic effect from anomalous-viscous fluid dynamics journal, January 2018

Ultra-relativistic nuclear collisions: Event shape engineering journal, February 2013

Effects of cluster particle correlations on local parity violation observables journal, June 2010

Title: Deciphering the $R_{Ψ_{m}}$ correlator in search for the chiral magnetic effect in relativistic heavy ion collisions

New correlator to detect and characterize the chiral magnetic effect
journal, June 2018

Observation of charge-dependent azimuthal correlations and possible local strong parity violation in heavy-ion collisions
journal, May 2010

Isolating the chiral magnetic effect from backgrounds by pair invariant mass
journal, February 2019

Resonance decay effects on anisotropy parameters
journal, September 2004

Vacuum stability and vacuum excitation in a spin-0 field theory
journal, April 1974

Measurement of charge multiplicity asymmetry correlations in high-energy nucleus-nucleus collisions at $\sqrt{s_{N N}} = 200$ GeV
journal, April 2014

A novel invariant mass method to isolate resonance backgrounds from the chiral magnetic effect
journal, February 2019

Measurements of dielectron production in Au + Au collisions at $\sqrt{s_{N N}} = 200$ GeV from the STAR experiment
journal, August 2015

Examination of the observability of a chiral magnetically driven charge-separation difference in collisions of the ${}_{44}^{96}{Ru} + {}_{44}^{96}{Ru}$ and ${}_{40}^{96}{Zr} + {}_{40}^{96}{Zr}$ isobars at energies available at the BNL Relativistic Heavy Ion Collider
journal, December 2018

Remarks on possible local parity violation in heavy ion collisions
journal, March 2010

Azimuthal anisotropy in Au+Au collisions at $\sqrt{s_{NN}} = 200 GeV$
journal, July 2005

Review of Particle Physics
journal, August 2014

Charge dependent particle correlations motivated by chiral magnetic effect and chiral vortical effect
journal, January 2017

New method for the experimental study of topological effects in the quark-gluon plasma
journal, January 2011

Chiral magnetic effect search in p+Au, d+Au and Au+Au collisions at RHIC
journal, January 2018

Challenges in flow background removal in search for the chiral magnetic effect
journal, May 2017

Azimuthal Anisotropy of $π^{0}$ Production in $Au + Au$ Collisions at $\sqrt{s_{N N}} = 200 GeV$ : Path-Length Dependence of Jet Quenching and the Role of Initial Geometry
journal, September 2010

Constraining the Chiral Magnetic Effect with charge-dependent azimuthal correlations in Pb-Pb collisions at $$ \sqrt{s_{\mathrm{NN}}} $$ = 2.76 and 5.02 TeV
journal, September 2020

Fluctuations of charge separation perpendicular to the event plane and local parity violation in $\sqrt{s_{NN}} = 200$ GeV Au + Au collisions at the BNL Relativistic Heavy Ion Collider
journal, December 2013

Charge separation relative to the reaction plane in Pb-Pb collisions at $\sqrt{s_{N N}} = 2.76 TeV$
journal, January 2013

Anomalous chiral transport in heavy ion collisions from Anomalous-Viscous Fluid Dynamics
journal, July 2018

Identified Particle Distributions in $p p$ and $Au + Au$ Collisions at $\sqrt{s_{N N}} = 200 GeV$
journal, March 2004

A sensitivity study of the primary correlators used to characterize chiral-magnetically-driven charge separation
journal, October 2020

Methods for analyzing anisotropic flow in relativistic nuclear collisions
journal, September 1998

Constraints on the chiral magnetic effect using charge-dependent azimuthal correlations in $p Pb$ and PbPb collisions at the CERN Large Hadron Collider
journal, April 2018

Responses of the chiral-magnetic-effect–sensitive sine observable to resonance backgrounds in heavy-ion collisions
journal, September 2018

Varying the chiral magnetic effect relative to flow in a single nucleus-nucleus collision
journal, July 2018

Charge conservation at energies available at the BNL Relativistic Heavy Ion Collider and contributions to local parity violation observables
journal, January 2011

Importance of Isobar Density Distributions on the Chiral Magnetic Effect Search
journal, July 2018

The effects of topological charge change in heavy ion collisions: “Event by event and violation”
journal, May 2008

Systematic measurements of identified particle spectra in $pp$ , $d + Au$ , and $Au + Au$ collisions at the STAR detector
journal, March 2009

Beam-Energy Dependence of Charge Separation along the Magnetic Field in $Au + Au$ Collisions at RHIC
journal, July 2014

$ρ^{0}$ Production and Possible Modification in $A u + A u$ and $p + p$ Collisions at $\sqrt{s_{N N}} = 200 G e V$
journal, March 2004

Azimuthal angle dependence of the charge imbalance from charge conservation effects
journal, March 2018

Constraining the magnitude of the Chiral Magnetic Effect with Event Shape Engineering in Pb–Pb collisions at $\sqrt{s_{NN}} = 2.76 TeV$
journal, February 2018

Azimuthal Charged-Particle Correlations and Possible Local Strong Parity Violation
journal, December 2009

Measurements of the chiral magnetic effect with background isolation in 200 GeV Au+Au collisions at STAR
journal, February 2019

Possibility of Spontaneous Parity Violation in Hot QCD
journal, July 1998

Parton energy loss in heavy-ion collisions via direct-photon and charged-particle azimuthal correlations
journal, September 2010

Parity violation in hot QCD: How to detect it
journal, November 2004

Re-examining the premise of isobaric collisions and a novel method to measure the chiral magnetic effect
journal, February 2019

Search for CME in U+U and Au+Au collisions in STAR with different approaches of handling backgrounds
journal, January 2021

Strong P, CP, T violations in heavy-ion collisions
journal, December 1985

Multiphase transport model for relativistic heavy ion collisions
journal, December 2005

Suppressed $π^{0}$ Production at Large Transverse Momentum in Central $A u + A u$ Collisions at $\sqrt{s_{N N}} = 200 G e V$
journal, August 2003

Observation of Charge-Dependent Azimuthal Correlations in $p − Pb$ Collisions and Its Implication for the Search for the Chiral Magnetic Effect
journal, March 2017

Quantifying the chiral magnetic effect from anomalous-viscous fluid dynamics
journal, January 2018

Ultra-relativistic nuclear collisions: Event shape engineering
journal, February 2013

Effects of cluster particle correlations on local parity violation observables
journal, June 2010