The yields of prompt and non-prompt JPsi and the fraction of non-prompt J/ψ are measured at midrapidity (|y| < 0.9) via the dielectron decay channel as a function of the midrapidity charged-particle multiplicity (|η| < 0.9) in pp collisions at TeV. The JPsi yields and the multiplicity are normalized by their average value in inelastic collisions. The multiplicity-dependent yield ratio between prompt JPsi and D0 is reported. The multiplicity is further divided into three azimuthal regions with respect to the JPsi momentum: toward the JPsi emission direction, transverse, or opposite to it. A stronger-than-linear increase of the self-normalized yields is observed for both prompt and non-prompt JPsi production, with similar trends. This behaviour is also observed in the toward region, while a weaker increase is observed in the transverse and away regions.

Multiplicity dependence of prompt and non-prompt J/ψ production at midrapidity in pp collisions at $$\sqrt{s}=13$$ TeV / Null, N., Abdallah, D.A.H., Abualrob, I.J., Acharya, S., Agarwal, K., Aglieri Rinella, G., Aglietta, L., Agrawal, N., Ahammed, Z., Ahmad, S., Ahuja, I., Akbar, Z., Akishina, V., Al-Turany, M., Alessandro, B., Alfarasyi, A.R., Alfaro Molina, R., Ali, B., Alici, A., Alme, J., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2026:7(2026). [10.1007/jhep07(2026)051]

Multiplicity dependence of prompt and non-prompt J/ψ production at midrapidity in pp collisions at $$\sqrt{s}=13$$ TeV

Bufalino, S.;Di Costanzo, M.;Follo, U.;Gioachin, G.;Lucia, G. A.;Pagliarino, V.;
2026

Abstract

The yields of prompt and non-prompt JPsi and the fraction of non-prompt J/ψ are measured at midrapidity (|y| < 0.9) via the dielectron decay channel as a function of the midrapidity charged-particle multiplicity (|η| < 0.9) in pp collisions at TeV. The JPsi yields and the multiplicity are normalized by their average value in inelastic collisions. The multiplicity-dependent yield ratio between prompt JPsi and D0 is reported. The multiplicity is further divided into three azimuthal regions with respect to the JPsi momentum: toward the JPsi emission direction, transverse, or opposite to it. A stronger-than-linear increase of the self-normalized yields is observed for both prompt and non-prompt JPsi production, with similar trends. This behaviour is also observed in the toward region, while a weaker increase is observed in the transverse and away regions.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/3016058
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