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Электронный каталог: Aboona, B. E. - Search for te Chiral Magnetic Effect Through Beam Energy Dependence of Charge Separation Using Ev...
Aboona, B. E. - Search for te Chiral Magnetic Effect Through Beam Energy Dependence of Charge Separation Using Ev...
Статья
Автор: Aboona, B. E.
Physical Review C: Search for te Chiral Magnetic Effect Through Beam Energy Dependence of Charge Separation Using Ev...
б.г.
ISBN отсутствует
Автор: Aboona, B. E.
Physical Review C: Search for te Chiral Magnetic Effect Through Beam Energy Dependence of Charge Separation Using Ev...
б.г.
ISBN отсутствует
На полку
Статья
Aboona, B.E.
Search for te Chiral Magnetic Effect Through Beam Energy Dependence of Charge Separation Using Event Shape Selection / B.E.Aboona, G.Agakishiev, A.Aitbayev, G.S.Averichev, T.G.Dedovich, A.Kechechyan, A.A.Korobitsin, R.Lednicky, V.B.Luong, E.Nedorezov, Y.Panebratsev, O.V.Rogachevsky, E.Shahaliev, A.Timofeev, M.V.Tokarev, S.Vokal, [a.o.]. – Text : electronic // Physical Review C. – 2026. – Vol. 113, No. 1. – P. 014912. – URL: https://doi.org/10.1103/pj7s-9ym7.
High-energy, heavy-ion collisions can create local domains of chirality-imbalanced quarks, reflecting the topological features of quantum chromodynamics. The chiral magnetic effect (CME) predicts an electric charge separation of quarks in such topological domains along the magnetic field (𝐵^-) generated by the passing of two high-𝑍 nuclei. We use a correlation observable Δ𝛾&sup(112) between charged meson pairs to detect the CME-induced charge separation and a novel event shape selection (ESS) method to mitigate the background effects related to elliptic flow (𝑣&sub(2)). The ESS method classifies events based on the emission pattern of final-state particles and determines Δ𝛾&sup(112)&sub(ESS) from the zero-flow limit. We reconstruct the 𝐵^- field direction from the spectator nucleons, which minimizes backgrounds unrelated to the collective motion of the system. In this work, we report the measurements of Δ𝛾&sup(112) and a background indicator Δ𝛾&sup(132) in Au+Au collisions from the Brookhaven National Laboratory Relativistic Heavy Ion Collider (RHIC) Beam Energy Scan phase II and at the top RHIC energy. After background suppression, Δ𝛾&sup(132)&sub(ESS) aligns with zero, and Δ𝛾&sup(112)&sub(ESS) is reduced to no more than 20% of Δ𝛾&sup(112). We observe a finite residual charge separation with 2.5𝜎, 3𝜎, and 3.2𝜎 significance in the 20–50% centrality range of Au+Au collisions at 11.5, 14.6, and 19.6 GeV. The results at 17.3 and 27 GeV also show positive values but with a lower significance of 1.3𝜎 and 1.1𝜎, respectively. The corresponding Δ𝛾&sup(112)&sub(ESS) values at 7.7, 9.2, and 200 GeV are consistent with zero within uncertainties.
ОИЯИ = ОИЯИ (JINR)2026
Aboona, B.E.
Search for te Chiral Magnetic Effect Through Beam Energy Dependence of Charge Separation Using Event Shape Selection / B.E.Aboona, G.Agakishiev, A.Aitbayev, G.S.Averichev, T.G.Dedovich, A.Kechechyan, A.A.Korobitsin, R.Lednicky, V.B.Luong, E.Nedorezov, Y.Panebratsev, O.V.Rogachevsky, E.Shahaliev, A.Timofeev, M.V.Tokarev, S.Vokal, [a.o.]. – Text : electronic // Physical Review C. – 2026. – Vol. 113, No. 1. – P. 014912. – URL: https://doi.org/10.1103/pj7s-9ym7.
High-energy, heavy-ion collisions can create local domains of chirality-imbalanced quarks, reflecting the topological features of quantum chromodynamics. The chiral magnetic effect (CME) predicts an electric charge separation of quarks in such topological domains along the magnetic field (𝐵^-) generated by the passing of two high-𝑍 nuclei. We use a correlation observable Δ𝛾&sup(112) between charged meson pairs to detect the CME-induced charge separation and a novel event shape selection (ESS) method to mitigate the background effects related to elliptic flow (𝑣&sub(2)). The ESS method classifies events based on the emission pattern of final-state particles and determines Δ𝛾&sup(112)&sub(ESS) from the zero-flow limit. We reconstruct the 𝐵^- field direction from the spectator nucleons, which minimizes backgrounds unrelated to the collective motion of the system. In this work, we report the measurements of Δ𝛾&sup(112) and a background indicator Δ𝛾&sup(132) in Au+Au collisions from the Brookhaven National Laboratory Relativistic Heavy Ion Collider (RHIC) Beam Energy Scan phase II and at the top RHIC energy. After background suppression, Δ𝛾&sup(132)&sub(ESS) aligns with zero, and Δ𝛾&sup(112)&sub(ESS) is reduced to no more than 20% of Δ𝛾&sup(112). We observe a finite residual charge separation with 2.5𝜎, 3𝜎, and 3.2𝜎 significance in the 20–50% centrality range of Au+Au collisions at 11.5, 14.6, and 19.6 GeV. The results at 17.3 and 27 GeV also show positive values but with a lower significance of 1.3𝜎 and 1.1𝜎, respectively. The corresponding Δ𝛾&sup(112)&sub(ESS) values at 7.7, 9.2, and 200 GeV are consistent with zero within uncertainties.
ОИЯИ = ОИЯИ (JINR)2026
