Observation of the Charged-Particle Multiplicity Dependence of $\sigma_{\psi(2S)}$/$\sigma_{J/\psi}$ in $p$-Pb Collisions at 8.16 TeV

Bound states of charm and anticharm quarks, known as charmonia, have a rich spectroscopic structure that can be used to probe the dynamics of hadron production in high-energy hadron collisions. Here, the cross section ratio of excited (ψ(2S)) and ground state (J/ψ) vector mesons is measured as a function of the charged-particle multiplicity in proton-lead (pPb) collisions at a center-of-mass (CM) energy per nucleon pair of 8.16 TeV. The data corresponding to an integrated luminosity of 175 nb−1 were collected using the CMS detector. The ratio is measured separately for prompt and nonprompt charmonia in the transverse momentum range 6.5

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Publication Details

Journal
Universität Zürich, ZORA
Published
2025-08-25
DOI
https://doi.org/10.5167/uzh-284023
Primary Topic
High-Energy Particle Collisions Research
Type
article
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article

Observation of the Charged-Particle Multiplicity Dependence of $\sigma_{\psi(2S)}$/$\sigma_{J/\psi}$ in $p$-Pb Collisions at 8.16 TeV

M. Sonawane, I. Mikulec, M. Dragicevic, P. S. Hussain et al.
Universität Zürich, ZORA
High-Energy Particle Collisions Research
article

Observation of the Charged-Particle Multiplicity Dependence of $\sigma_{\psi(2S)}$/$\sigma_{J/\psi}$ in $p$-Pb Collisions at 8.16 TeV

M. Sonawane, I. Mikulec, M. Dragicevic, P. S. Hussain, C.-E. Wulz, S. Dansana, V. Chekhovsky, et al., D. Liko, W. Adam, CMS Collaboration, N. Krammer, T. Van Laer, D. Schwarz, A. Hayrapetyan, P. Van Mechelen, H. Kwon, J. Schieck, A. Tumasyan, T. Janssen, A. Li, S. Chatterjee, J. W. Andrejkovic, N. Breugelmans, R. Schöfbeck, M. Jeitler, W. Waltenberger, T. Bergauer, J. D’Hondt, L. Benato, K. Damanakis, V. Makarenko
article en

Abstract

Bound states of charm and anticharm quarks, known as charmonia, have a rich spectroscopic structure that can be used to probe the dynamics of hadron production in high-energy hadron collisions. Here, the cross section ratio of excited (ψ(2S)) and ground state (J/ψ) vector mesons is measured as a function of the charged-particle multiplicity in proton-lead (pPb) collisions at a center-of-mass (CM) energy per nucleon pair of 8.16 TeV. The data corresponding to an integrated luminosity of 175 nb−1 were collected using the CMS detector. The ratio is measured separately for prompt and nonprompt charmonia in the transverse momentum range 6.5

Universität Zürich, ZORA
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Observation of the Charged-Particle Multiplicity Dependence of $\sigma_{\psi(2S)}$/$\sigma_{J/\psi}$ in $p$-Pb Collisions at 8.16 TeV — M. Sonawane, I. Mikulec, et al. · Universität Zürich, ZORA (2025) | TGRS Research Map | TGRS