Measurement of the ψ(2S) to J/ψ cross-section ratio as a function of centrality in PbPb collisions at sNNsNN​​ = 5.02 TeV

The LHCb Collaboration; W. Barter; F. Betti; A. Bohare; E. Buchanan; P. E. L. Clarke; R. Currie; S. Eisenhardt; K. Farmer; S. Gambetta; M. Kane; Y. Liu; F. Muheim; M. Needham; F. Oliva; R.H. O'Neil; O. Ozcelik; M. Richardson-Slipper; G. Sarpis; L. Soares Lavra; B. Urbach; C. Vrahas; M. R. J. Williams

doi:10.1007/JHEP07(2025)235

Measurement of the ψ(2S) to J/ψ cross-section ratio as a function of centrality in PbPb collisions at sNNsNN = 5.02 TeV

The LHCb Collaboration, W. Barter, F. Betti, A. Bohare, E. Buchanan, P. E. L. Clarke, R. Currie, S. Eisenhardt, K. Farmer, S. Gambetta, M. Kane, Y. Liu, F. Muheim, M. Needham, F. Oliva, R.H. O'Neil, O. Ozcelik, M. Richardson-Slipper, G. Sarpis, L. Soares LavraB. Urbach, C. Vrahas, M. R. J. Williams

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

The ratio of prompt production cross-sections of ψ(2S) and J/ψ mesons in their dimuon final state is measured as a function of centrality, using data collected by the LHCb detector in PbPb collisions at sNNsNN = 5.02 TeV, for the first time in the forward rapidity region. The measured ratio shows no dependence on the collision centrality, and is compared to the latest theory predictions and to the recent measurements in literature.

Original language	English
Article number	235
Pages (from-to)	1-19
Number of pages	19
Journal	Journal of High Energy Physics
Volume	2025
Issue number	7
DOIs	https://doi.org/10.1007/JHEP07(2025)235
Publication status	Published - 23 Jul 2025

Keywords / Materials (for Non-textual outputs)

Forward Physics
Quarkonium
Relativistic Heavy Ion Physics
Hadron-Hadron Scattering

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10.1007/JHEP07(2025)235Licence: Creative Commons: Attribution (CC-BY)

3 Active
4 Finished

Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
Science and Technology Facilities Council
1/04/23 → 31/03/26
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
Science and Technology Facilities Council
1/10/22 → 31/03/26
Project: Research
Beautiful Flavours: Discovering New Physics with B-hadrons and Tau-leptons
Barter, W. (Principal Investigator)
UKRI (formerly RCUK)
1/07/22 → 30/06/27
Project: Research

Cite this

The LHCb Collaboration, Barter, W., Betti, F., Bohare, A., Buchanan, E., Clarke, P. E. L., Currie, R., Eisenhardt, S., Farmer, K., Gambetta, S., Kane, M., Liu, Y., Muheim, F., Needham, M., Oliva, F., O'Neil, R. H., Ozcelik, O., Richardson-Slipper, M., Sarpis, G., ... Williams, M. R. J. (2025). Measurement of the ψ(2S) to J/ψ cross-section ratio as a function of centrality in PbPb collisions at sNNsNN = 5.02 TeV. Journal of High Energy Physics, 2025(7), 1-19. Article 235. https://doi.org/10.1007/JHEP07(2025)235

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title = "Measurement of the ψ(2S) to J/ψ cross-section ratio as a function of centrality in PbPb collisions at sNNsNN = 5.02 TeV",

abstract = "The ratio of prompt production cross-sections of ψ(2S) and J/ψ mesons in their dimuon final state is measured as a function of centrality, using data collected by the LHCb detector in PbPb collisions at sNNsNN = 5.02 TeV, for the first time in the forward rapidity region. The measured ratio shows no dependence on the collision centrality, and is compared to the latest theory predictions and to the recent measurements in literature.",

keywords = "Forward Physics, Quarkonium, Relativistic Heavy Ion Physics, Hadron-Hadron Scattering",

author = "\{The LHCb Collaboration\} and W. Barter and F. Betti and A. Bohare and E. Buchanan and Clarke, \{P. E. L.\} and R. Currie and S. Eisenhardt and K. Farmer and S. Gambetta and M. Kane and Y. Liu and F. Muheim and M. Needham and F. Oliva and R.H. O'Neil and O. Ozcelik and M. Richardson-Slipper and G. Sarpis and Lavra, \{L. Soares\} and B. Urbach and C. Vrahas and Williams, \{M. R. J.\}",

year = "2025",

month = jul,

day = "23",

doi = "10.1007/JHEP07(2025)235",

language = "English",

volume = "2025",

pages = "1--19",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

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The LHCb Collaboration, Barter, W , Betti, F, Bohare, A, Buchanan, E , Clarke, PEL , Currie, R , Eisenhardt, S, Farmer, K, Gambetta, S , Kane, M, Liu, Y, Muheim, F , Needham, M , Oliva, F, O'Neil, RH, Ozcelik, O, Richardson-Slipper, M, Sarpis, G, Lavra, LS, Urbach, B, Vrahas, C & Williams, MRJ 2025, 'Measurement of the ψ(2S) to J/ψ cross-section ratio as a function of centrality in PbPb collisions at sNNsNN = 5.02 TeV', Journal of High Energy Physics, vol. 2025, no. 7, 235, pp. 1-19. https://doi.org/10.1007/JHEP07(2025)235

TY - JOUR

T1 - Measurement of the ψ(2S) to J/ψ cross-section ratio as a function of centrality in PbPb collisions at sNNsNN = 5.02 TeV

AU - The LHCb Collaboration

AU - Barter, W.

AU - Betti, F.

AU - Bohare, A.

AU - Buchanan, E.

AU - Clarke, P. E. L.

AU - Currie, R.

AU - Eisenhardt, S.

AU - Farmer, K.

AU - Gambetta, S.

AU - Kane, M.

AU - Liu, Y.

AU - Muheim, F.

AU - Needham, M.

AU - Oliva, F.

AU - O'Neil, R.H.

AU - Ozcelik, O.

AU - Richardson-Slipper, M.

AU - Sarpis, G.

AU - Lavra, L. Soares

AU - Urbach, B.

AU - Vrahas, C.

AU - Williams, M. R. J.

PY - 2025/7/23

Y1 - 2025/7/23

N2 - The ratio of prompt production cross-sections of ψ(2S) and J/ψ mesons in their dimuon final state is measured as a function of centrality, using data collected by the LHCb detector in PbPb collisions at sNNsNN = 5.02 TeV, for the first time in the forward rapidity region. The measured ratio shows no dependence on the collision centrality, and is compared to the latest theory predictions and to the recent measurements in literature.

AB - The ratio of prompt production cross-sections of ψ(2S) and J/ψ mesons in their dimuon final state is measured as a function of centrality, using data collected by the LHCb detector in PbPb collisions at sNNsNN = 5.02 TeV, for the first time in the forward rapidity region. The measured ratio shows no dependence on the collision centrality, and is compared to the latest theory predictions and to the recent measurements in literature.

KW - Forward Physics

KW - Quarkonium

KW - Relativistic Heavy Ion Physics

KW - Hadron-Hadron Scattering

U2 - 10.1007/JHEP07(2025)235

DO - 10.1007/JHEP07(2025)235

M3 - Article

SN - 1126-6708

VL - 2025

SP - 1

EP - 19

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 7

M1 - 235

ER -

Measurement of the ψ(2S) to J/ψ cross-section ratio as a function of centrality in PbPb collisions at sNNsNN​​ = 5.02 TeV

Abstract

Keywords / Materials (for Non-textual outputs)

Access to Document

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Projects

Experimental Particle Physics at the University of Edinburgh

Experimental Particle Physics at the University of Edinburgh

Beautiful Flavours: Discovering New Physics with B-hadrons and Tau-leptons

Cite this

Measurement of the ψ(2S) to J/ψ cross-section ratio as a function of centrality in PbPb collisions at sNNsNN = 5.02 TeV