Bulletin of the American Physical Society
2021 Fall Meeting of the APS Division of Nuclear Physics
Volume 66, Number 8
Monday–Thursday, October 11–14, 2021; Virtual; Eastern Daylight Time
Session CA: Search for the Chiral Magnetic Effect: Recent results from isobar collisions at RHIC |
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Chair: Lijuan Ruan, Brookhaven National Laboratory Room: Grand Ballroom |
Monday, October 11, 2021 7:00PM - 7:26PM |
CA.00001: Theoretical Motivation for the Chiral Magnetic Effect in Heavy-Ion Collisions Invited Speaker: Dmitri E Kharzeev
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Monday, October 11, 2021 7:26PM - 8:12PM |
CA.00002: Search for the Chiral Magnetic Effect with Isobar Collisions at 200 GeV by the STAR Collaboration at RHIC Invited Speaker: Sergei A Voloshin The chiral magnetic effect (CME) is predicted to occur as a consequence of a local violation of P and CP symmetries of the strong interaction amidst a strong magnetic field generated in relativistic heavy-ion collisions. Experimental manifestation of the CME involves a separation of positively and negatively charged hadrons along the direction of the magnetic field. Previous measurements of the CME-sensitive charge-separation observables remain inconclusive because of large background contributions. In order to better control the influence of signal and backgrounds, the STAR Collaboration has performed a blind analysis of a large data sample of approximately 3.8 billion isobar Ru+Ru (ARu = 96, ZRu = 44) and Zr+Zr (AZr = 96, ZZr = 40) collisions at the top RHIC energy. Prior to the blind analysis, the CME signatures were predefined as a significant excess of the CME-sensitive observables in Ru+Ru collisions over those in Zr+Zr collisions, owing to a larger magnetic field in the former. This presentation reports on the findings from the isobar blind analysis and their significance for the CME search in heavy- ion collisions. |
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