Search for the Chiral Magnetic Effect via Charge-Dependent Azimuthal Correlations Relative to Spectator and Participant Planes in Au + Au Collisions at √s.sub.NN./sub. = 200 GeV

0556225 - ÚJF 2023 RIV US eng J - Článek v odborném periodiku
Abdallah, M. S. - Adam, J. - Adamczyk, L. - Adams, J. R. - Adkins, J. K. - Agakishiev, G. - Bielčík, J. - Bielčíková, Jana - Federič, Pavol - Holub, L. - Chaloupka, P. - Kosarzewski, L. K. - Líčeník, Robert - Ponimatkin, Georgij - Prozorova, V. - Robotková, Monika - Rusňák, Jan - Šimko, Miroslav - Šumbera, Michal - Truhlář, T. - Trzeciak, B. A. - Vaněk, Jan … celkem 388 autorů
Search for the Chiral Magnetic Effect via Charge-Dependent Azimuthal Correlations Relative to Spectator and Participant Planes in Au + Au Collisions at √s_NN = 200 GeV.
Physical Review Letters. Roč. 128, č. 9 (2022), č. článku 092301. ISSN 0031-9007. E-ISSN 1079-7114
Grant CEP: GA MŠMT LTT18002
Výzkumná infrastruktura: BNL-CZ II - 90109
Institucionální podpora: RVO:61389005
Klíčová slova: STAR collaboration * heavy ion collisions
Obor OECD: Nuclear physics
Impakt faktor: 8.6, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1103/PhysRevLett.128.092301

The chiral magnetic effect (CME) refers to charge separation along a strong magnetic field due to imbalanced chirality of quarks in local parity and charge-parity violating domains in quantum chromodynamics. The experimental measurement of the charge separation is made difficult by the presence of a major background from elliptic azimuthal anisotropy. This background and the CME signal have different sensitivities to the spectator and participant planes, and could thus be determined by measurements with respect to these planes. We report such measurements in Au + Au collisions at a nucleon-nucleon center-of-mass energy of 200 GeV at the Relativistic Heavy-Ion Collider. It is found that the charge separation, with the flow background removed, is consistent with zero in peripheral (large impact parameter) collisions. Some indication of finite CME signals is seen in midcentral (intermediate impact parameter) collisions. Significant residual background effects may, however, still be present.
Trvalý link: http://hdl.handle.net/11104/0330514