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2026
article
Multiplicity dependence of prompt and non-prompt J/ψ production at midrapidity in pp collisions at TeV
ALICE Collaboration, D. A. H. Abdallah, I. J. Abualrob, S. Acharya, K. Agarwal, G. Aglieri Rinella, L. Aglietta, N. Agrawal, Z. Ahammed, S. Ahmad, I. Ahuja, Z. Akbar, V. Akishina, M. Al-Turany, B. Alessandro, A. R. Alfarasyi, R. Alfaro Molina, B. Ali, A. Alici, J. Alme, G. Alocco, T. Alt, I. Altsybeev, C. Andrei, N. Andreou, A. Caliva, P. Christakoglou, T. Chujo, A. Dobrin, L. Fabbietti, A. Grelli, R. Gupta, P. M. Jacobs, S. Jaelani, J. Klein, C. Kuhn, S. L. La Pointe, G. Luparello, S. Muhuri, T. Peitzmann, N. Poljak, M. H.P. Sas, R. J.M. Snellings, D. Thomas, L. V.R. Van Doremalen, M. Verweij, J. P. Wessels, Z. Yin, X. Zhang, Y. Zhang, D. Zhou, J. Lömker, Bas Hofman, Olaf Massen, Sub Subatomic Physics (SAP), Afd Subatomic Physics (SAP), Sub GRASP, Sub String Theory Cosmology and ElemPart, Sub Algemeen Physics Education, Sub Plant-Microbe Interactions, Sub Mathematics Education, Dep Natuurkunde, Sub Algemeen Subatomic Physics, Sub Physical Oceanography, Seismology, Sub AW Externen
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Le résumé fourni par la source
The yields of prompt and non-prompt J/ψ 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 J/ψ yields and the multiplicity are normalized by their average value in inelastic collisions. The multiplicity-dependent yield ratio between prompt J/ψ and D0 is reported. The multiplicity is further divided into three azimuthal regions with respect to the J/ψ momentum: toward the J/ψ 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 J/ψ 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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Les sujets associés
High-Energy Particle Collisions ResearchParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle Interactions