The azimuthal-correlation distributions between electrons from the decays of heavy-flavor hadrons and associated charged particles in Pb–Pb collisions at sNN=5.02 TeV are reported for the 0–10% and 30–50% centrality classes. This measurement provides access to the jet-like correlation observables in the heavy-flavor sector in Pb–Pb collisions. The analysis is performed for trigger electrons from heavy-flavor hadron decays with transverse momentum 4<16GeV/c, considering associated particles within the transverse-momentum range 1<7GeV/c, and a pseudorapidity difference of |Δη|<1 between the trigger electron and associated particles. The per-trigger nuclear modification factor (IAA) is calculated to compare the near- and away-side peak yields to those in pp collisions at s=5.02 TeV. In 0–10% central collisions, the IAA indicates a hint of enhancement of associated-particle yields with pT<3 GeV/c on the near side, and a suppression of yields with pT>4 GeV/c on the away side. The IAA for electron triggers from heavy-flavor hadron decays is compared with that for light-flavor and strange-particle triggers to investigate the dependence on different fragmentation processes and parton-medium dynamics, and is found to be the same within uncertainties.

Medium-induced modification of azimuthal correlations of electrons from heavy-flavor hadron decays with charged particles in Pb–Pb collisions at $$\mathbf {\sqrt{s_{\textrm{NN}}} = 5.02}$$ TeV / Null, N., Abualrob, I.J., Acharya, S., Aglieri Rinella, G., Aglietta, L., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, S., Ahuja, I., Akbar, Z., Akindinov, A., Akishina, V., Al-Turany, M., Aleksandrov, D., Alessandro, B., Alfanda, H.M., Alfaro Molina, R., Ali, B., Alici, A., et al.. - In: EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6052. - 86:6(2026). [10.1140/epjc/s10052-026-15412-w]

Medium-induced modification of azimuthal correlations of electrons from heavy-flavor hadron decays with charged particles in Pb–Pb collisions at $$\mathbf {\sqrt{s_{\textrm{NN}}} = 5.02}$$ TeV

Agnello, M.;Bufalino, S.;Follo, U.;Gioachin, G.;
2026

Abstract

The azimuthal-correlation distributions between electrons from the decays of heavy-flavor hadrons and associated charged particles in Pb–Pb collisions at sNN=5.02 TeV are reported for the 0–10% and 30–50% centrality classes. This measurement provides access to the jet-like correlation observables in the heavy-flavor sector in Pb–Pb collisions. The analysis is performed for trigger electrons from heavy-flavor hadron decays with transverse momentum 4<16GeV/c, considering associated particles within the transverse-momentum range 1<7GeV/c, and a pseudorapidity difference of |Δη|<1 between the trigger electron and associated particles. The per-trigger nuclear modification factor (IAA) is calculated to compare the near- and away-side peak yields to those in pp collisions at s=5.02 TeV. In 0–10% central collisions, the IAA indicates a hint of enhancement of associated-particle yields with pT<3 GeV/c on the near side, and a suppression of yields with pT>4 GeV/c on the away side. The IAA for electron triggers from heavy-flavor hadron decays is compared with that for light-flavor and strange-particle triggers to investigate the dependence on different fragmentation processes and parton-medium dynamics, and is found to be the same within uncertainties.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/3016112
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