Beam-Energy Dependence of Charge Separation Along the Magnetic Field in Au + Au Collisions at RHIC

Authors

L. Adamczyk
J. K. Adkins
G. Agakishiev
M. M. Aggarwal
Z. Ahammed
I. Alekseev
J. Alford
C. D. Anson
A. Aparin
D. Arkhipkin
E. C. Aschenauer
G. S. Averichev
A. Banerjee
D. R. Beavis
R. Bellwied
A. Bhasin
A. K. Bhati
P. Bhattarai
H. Bichsel
M. Zyzak
Et al.
STAR Collaboration

Document Type

Article

Publication Date

2014

DOI

10.1103/PhysRevLett.113.052302

Publication Title

Physical Review Letters

Volume

113

Issue

5

Pages

052302 (1-7)

Abstract

Local parity-odd domains are theorized to form inside a quark-gluon plasma which has been produced in high-energy heavy-ion collisions. The local parity-odd domains manifest themselves as charge separation along the magnetic field axis via the chiral magnetic effect. The experimental observation of charge separation has previously been reported for heavy-ion collisions at the top RHIC energies. In this Letter, we present the results of the beam-energy dependence of the charge correlations in Au+Au collisions at midrapidity for center-of-mass energies of 7.7, 11.5, 19.6, 27, 39, and 62.4 GeV from the STAR experiment. After background subtraction, the signal gradually reduces with decreased beam energy and tends to vanish by 7.7 GeV. This implies the dominance of hadronic interactions over partonic ones at lower collision energies.

Rights

© 2014 American Physical Society.

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Original Publication Citation

Adamczyk, L., Przybycien, M., Adkins, J. K., Fatemi, R., Ramachandran, S., Webb, G., Agakishiev, G., Aparin, A., Averichev, G. S., Bunzarov, I., Dedovich, T. G., Efimov, L. G., Fedorisin, J., Filip, P., Kechechyan, A., Lednicky, R., Panebratsev, Y., Rogachevskiy, O. V., Shahaliev, E., . . . van, N. G. (2014). Beam-energy dependence of charge separation along the magnetic field in Au+Au collisions at RHIC. Physical Review Letters, 113(5), 1-7, Article 052302. https://doi.org/10.1103/PhysRevLett.113.052302

Repository Citation

Adamczyk, L.; Adkins, J. K.; Agakishiev, G.; Aggarwal, M. M.; Ahammed, Z.; Alekseev, I.; Alford, J.; Anson, C. D.; Aparin, A.; Arkhipkin, D.; Aschenauer, E. C.; Averichev, G. S.; Banerjee, A.; Beavis, D. R.; Bellwied, R.; Bhasin, A.; Bhati, A. K.; Bhattarai, P.; Bichsel, H.; Zyzak, M.; Et al.; and STAR Collaboration, "Beam-Energy Dependence of Charge Separation Along the Magnetic Field in Au + Au Collisions at RHIC" (2014). Physics Faculty Publications. 796.
https://digitalcommons.odu.edu/physics_fac_pubs/796