Azimuthal Charged-Particle Correlations and Possible Local Strong Parity Violation
Author(s)
Jones, Christopher LaDon; Leight, William Axel; Seele, Joseph Patrick; Sakuma, Tai; Corliss, Ross Cameron; Kocoloski, Adam Philip; Balewski, Jan T.; Betancourt, Michael Joseph; Surrow, Bernd; Redwine, Robert P; van Nieuwenhuizen, Gerrit J; Walker, Matthew H; Milner, Richard G; Hoffman, Alan Michael; ... Show more Show less
DownloadAbelev-2009-Azimuthal Charged-Particle Correlations and Possible Local Strong Parity Violation.pdf (752.4Kb)
PUBLISHER_POLICY
Publisher Policy
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Terms of use
Metadata
Show full item recordAbstract
Parity-odd domains, corresponding to nontrivial topological solutions of the QCD vacuum, might be created during relativistic heavy-ion collisions. These domains are predicted to lead to charge separation of quarks along the system’s orbital momentum axis. We investigate a three-particle azimuthal correlator which is a P even observable, but directly sensitive to the charge separation effect. We report measurements of charged hadrons near center-of-mass rapidity with this observable in Au+Au and Cu+Cu collisions at [sqrt s[subscript NN]]=200 GeV using the STAR detector. A signal consistent with several expectations from the theory is detected. We discuss possible contributions from other effects that are not related to parity violation.
Date issued
2009-12Department
Bates Linear Accelerator Center; Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Physical Review Letters
Publisher
American Physical Society
Citation
Abelev, B.I. et al. "Azimuthal Charged-Particle Correlations and Possible Local Strong Parity Violation.” Phys. Rev. Lett. 103, 251601 (2009) © 2009 The American Physical Society.
Version: Final published version
ISSN
0031-9007