The azimuthal-correlation distributions between electrons from the decays of heavy-flavor hadrons and associated charged particles in Pb–Pb collisions at $\sqrt{s_{NN}}$ = 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 $4 < p^e_T < 16$ Gev/c, considering associated particles within the transverse-momentum range $1 < p^{assoc}_T < 7$ Gev/c, and a pseudorapidity difference of $|\Delta \eta| < 1$ between the trigger electron and associated particles. The per-trigger nuclear modification factor ($I_{AA}$) is calculated to compare the near- and away-side peak yields to those in pp collisions at $\sqrt{s}$ = 5.02 TeV. In 0–10% central collisions, the indicates a hint of enhancement of associated-particle yields with $p_T < 3$ GeV/c on the near side, and a suppression of yields with $p_T > 4$ GeV/c on the away side. The $I_{AA}$ 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
Cortese, P.;Jacazio, N.;Ramello, L.;Sitta, M.;
2026-01-01
Abstract
The azimuthal-correlation distributions between electrons from the decays of heavy-flavor hadrons and associated charged particles in Pb–Pb collisions at $\sqrt{s_{NN}}$ = 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 $4 < p^e_T < 16$ Gev/c, considering associated particles within the transverse-momentum range $1 < p^{assoc}_T < 7$ Gev/c, and a pseudorapidity difference of $|\Delta \eta| < 1$ between the trigger electron and associated particles. The per-trigger nuclear modification factor ($I_{AA}$) is calculated to compare the near- and away-side peak yields to those in pp collisions at $\sqrt{s}$ = 5.02 TeV. In 0–10% central collisions, the indicates a hint of enhancement of associated-particle yields with $p_T < 3$ GeV/c on the near side, and a suppression of yields with $p_T > 4$ GeV/c on the away side. The $I_{AA}$ 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.| File | Dimensione | Formato | |
|---|---|---|---|
|
s10052-026-15412-w.pdf
file ad accesso aperto
Tipologia:
Versione Editoriale (PDF)
Licenza:
Creative commons
Dimensione
3.13 MB
Formato
Adobe PDF
|
3.13 MB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.


