Azimuthal Charged-Particle Correlations and Possible Local Strong Parity Violation
Name
Abelev-2009-Azimuthal Charged-Particle Correlations and Possible Local Strong Parity Violation.pdf
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752.46 KB
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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
Date Issued
December 2009
Journal
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
Abstract
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.
MIT Department
Bates Linear Accelerator Center
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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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.
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.103.251601
