This paper presents the first measurement of ψ(2S) and χc1(3872) meson production within fully reconstructed jets. Each quarkonium state (tag) is reconstructed via its decay to the J/ψ(→μ+μ-)π+π- final state in the forward region using proton-proton collision data collected by the LHCb experiment at the center-of-mass-energy of 13TeV in 2016, corresponding to an integrated luminosity of 1.64\,fb-1. The fragmentation function, presented as the ratio of the quarkonium-tag transverse momentum to the full jet transverse momentum (pT(tag)/pT(jet)), is measured differentially in pT(jet) and pT(tag) bins. The distributions are separated into promptly produced quarkonia from proton-proton collisions and quarkonia produced from displaced b-hadron decays. While the displaced quarkonia fragmentation functions are in general well described by parton-shower predictions, the prompt quarkonium distributions differ significantly from fixed-order non-relativistic QCD (NRQCD) predictions followed by a QCD parton shower.

Zunica, G., Zuliani, D., Zou, Q., Zhuo, J., Zhukov, V., Zhu, X., et al. (2025). Measurements of ψ(2S) and χc1(3872) production within fully reconstructed jets. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 85(5) [10.1140/epjc/s10052-025-13852-4].

Measurements of ψ(2S) and χc1(3872) production within fully reconstructed jets

Salomoni M.;Pizzichemi M.;Minotti A.;Martinelli M.;Malentacca L.;Kirsebom V. S.;Garcia Pardinas J.;Fazzini D.;Carniti P.;Capelli S.;Calvi M.;Borsato M.;Anelli A.;
2025

Abstract

This paper presents the first measurement of ψ(2S) and χc1(3872) meson production within fully reconstructed jets. Each quarkonium state (tag) is reconstructed via its decay to the J/ψ(→μ+μ-)π+π- final state in the forward region using proton-proton collision data collected by the LHCb experiment at the center-of-mass-energy of 13TeV in 2016, corresponding to an integrated luminosity of 1.64\,fb-1. The fragmentation function, presented as the ratio of the quarkonium-tag transverse momentum to the full jet transverse momentum (pT(tag)/pT(jet)), is measured differentially in pT(jet) and pT(tag) bins. The distributions are separated into promptly produced quarkonia from proton-proton collisions and quarkonia produced from displaced b-hadron decays. While the displaced quarkonia fragmentation functions are in general well described by parton-shower predictions, the prompt quarkonium distributions differ significantly from fixed-order non-relativistic QCD (NRQCD) predictions followed by a QCD parton shower.
Articolo in rivista - Articolo scientifico
Astrophysics; Bosons; Fighter aircraft; Hadrons; Platinum; Protons; Quantum theory; Relativity; Tellurium compounds
English
22-mag-2025
2025
85
5
562
open
Zunica, G., Zuliani, D., Zou, Q., Zhuo, J., Zhukov, V., Zhu, X., et al. (2025). Measurements of ψ(2S) and χc1(3872) production within fully reconstructed jets. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 85(5) [10.1140/epjc/s10052-025-13852-4].
File in questo prodotto:
File Dimensione Formato  
unpaywall-bitstream-1983278072.pdf

accesso aperto

Tipologia di allegato: Publisher’s Version (Version of Record, VoR)
Licenza: Creative Commons
Dimensione 4.42 MB
Formato Adobe PDF
4.42 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/578889
Citazioni
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 1
Social impact