skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Procedure for measuring photon and vector meson circular polarization variation with respect to the reaction plane in relativistic heavy-ion collisions

Abstract

The electromagnetic (EM) eld pattern created by spectators in relativistic heavy-ion collisions plants a seed of positive (negative) magnetic helicity in the hemisphere above (below) the reaction plane. Owing to the chiral anomaly, the magnetic helicity interacts with the fermionic helicity of the collision system, and causes photons emitted in upper- and lower-hemispheres to have different preferences in the circular polarization. Similar helicity separation for massive particles, due to the global vorticity, is also possible. In this paper, we lay down a procedure to measure the variation of the circular polarization w.r.t the reaction plane in relativistic heavy-ion collisions for massless photons, as well as similar polarization patterns for vector mesons decaying into two daughters. We propose to study the yield differentially and compare the yield between upper- and lower-hemispheres in order to identify and quantify such effects.

Authors:
 [1];  [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Univ. of California, Los Angeles, CA (United States). Dept. of Physics and Astronomy
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) (SC-26)
OSTI Identifier:
1340405
Alternate Identifier(s):
OSTI ID: 1312055
Report Number(s):
BNL-113189-2016-JA
Journal ID: ISSN 2469-9985; PRVCAN; R&D Project: PO 004; KB0202013; TRN: US1701678
Grant/Contract Number:  
SC0012704; AC02-98CH10886; FG02-89ER40531; FG02-88ER40424
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 94; Journal Issue: 2; 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

Tang, A. H., and Wang, G. Procedure for measuring photon and vector meson circular polarization variation with respect to the reaction plane in relativistic heavy-ion collisions. United States: N. p., 2016. Web. doi:10.1103/PhysRevC.94.024920.
Tang, A. H., & Wang, G. Procedure for measuring photon and vector meson circular polarization variation with respect to the reaction plane in relativistic heavy-ion collisions. United States. doi:10.1103/PhysRevC.94.024920.
Tang, A. H., and Wang, G. Tue . "Procedure for measuring photon and vector meson circular polarization variation with respect to the reaction plane in relativistic heavy-ion collisions". United States. doi:10.1103/PhysRevC.94.024920. https://www.osti.gov/servlets/purl/1340405.
@article{osti_1340405,
title = {Procedure for measuring photon and vector meson circular polarization variation with respect to the reaction plane in relativistic heavy-ion collisions},
author = {Tang, A. H. and Wang, G.},
abstractNote = {The electromagnetic (EM) eld pattern created by spectators in relativistic heavy-ion collisions plants a seed of positive (negative) magnetic helicity in the hemisphere above (below) the reaction plane. Owing to the chiral anomaly, the magnetic helicity interacts with the fermionic helicity of the collision system, and causes photons emitted in upper- and lower-hemispheres to have different preferences in the circular polarization. Similar helicity separation for massive particles, due to the global vorticity, is also possible. In this paper, we lay down a procedure to measure the variation of the circular polarization w.r.t the reaction plane in relativistic heavy-ion collisions for massless photons, as well as similar polarization patterns for vector mesons decaying into two daughters. We propose to study the yield differentially and compare the yield between upper- and lower-hemispheres in order to identify and quantify such effects.},
doi = {10.1103/PhysRevC.94.024920},
journal = {Physical Review C},
number = 2,
volume = 94,
place = {United States},
year = {2016},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Spin polarized photons and dileptons from axially charged plasma
journal, December 2013


Chiral magnetic and vortical effects in high-energy nuclear collisions—A status report
journal, May 2016


Comments about the electromagnetic field in heavy-ion collisions
journal, September 2014


Photon and Electron Polarization in High-Energy Bremsstrahlung and Pair Production with Screening
journal, May 1959


Photon polarization as a probe for quark–gluon plasma dynamics
journal, September 2008


Model-independent constraints on the shape parameters of dilepton angular distributions
journal, March 2011


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


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


Self-similar inverse cascade of magnetic helicity driven by the chiral anomaly
journal, December 2015


Pair production as an analyser of circular polarization of υ rays from neutral particle decays
journal, April 1962

  • Olsen, Haakon; Maximon, L. C.
  • Il Nuovo Cimento, Vol. 24, Issue 1
  • DOI: 10.1007/BF02785772

Dynamical evolution of the chiral magnetic effect: Applications to the quark-gluon plasma
journal, October 2015


Vorticity in heavy-ion collisions
journal, June 2016


On the connection between production mechanism and decay of resonances at high energies
journal, July 1964

  • Gottfried, K.; Jackson, J. D.
  • Il Nuovo Cimento, Vol. 33, Issue 2
  • DOI: 10.1007/BF02750195

Angular distribution of dileptons in high-energy hadron collisions
journal, October 1977


Globally Polarized Quark-Gluon Plasma in Noncentral A + A Collisions
journal, March 2005


Electromagnetic field and the chiral magnetic effect in the quark-gluon plasma
journal, June 2015


Towards the experimental clarification of quarkonium polarization
journal, September 2010


Helicity separation in heavy-ion collisions
journal, December 2013