Title

Fluctuations of Charge Separation Perpendicular to the Event Plane and Local Parity Violation in Root S-NN=200 GeV Au + Au Collisions at the BNL Relativistic Heavy Ion Collider

Authors

James L. Drachenberg, Valparaiso University
Adam Gibson, Valparaiso University
David Grosnick, Valparaiso University
Donald D. Koetke, Valparaiso University
Shirvel Stanislaus, Valparaiso University
Star Collaboration

Document Type

Article

Publication Date

12-2013

Abstract

Previous experimental results based on data (similar to 15 x 10(6) events) collected by the STAR detector at the BNL Relativistic Heavy Ion Collider suggest event-by-event charge-separation fluctuations perpendicular to the event plane in noncentral heavy-ion collisions. Here we present the correlator previously used split into its two component parts to reveal correlations parallel and perpendicular to the event plane. The results are from a high-statistics 200-GeV Au + Au collisions data set (57 x 10(6) events) collected by the STAR experiment. We explicitly count units of charge separation from which we find clear evidence for more charge-separation fluctuations perpendicular than parallel to the event plane. We also employ a modified correlator to study the possible P-even background in same- and opposite-charge correlations, and find that the P-even background may largely be explained by momentum conservation and collective motion.

Recommended Citation

Drachenberg, James L.; Gibson, Adam; Grosnick, David; Koetke, Donald D.; Stanislaus, Shirvel; and Star Collaboration, "Fluctuations of Charge Separation Perpendicular to the Event Plane and Local Parity Violation in Root S-NN=200 GeV Au + Au Collisions at the BNL Relativistic Heavy Ion Collider" (2013). Physics and Astronomy Faculty Publications. 48.
https://scholar.valpo.edu/phys_astro_fac_pub/48