Central exclusive production of J/ψ and ψ(2S) mesons in pp collisions at √s=13 TeV
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Title: | Central exclusive production of J/ψ and ψ(2S) mesons in pp collisions at √s=13 TeV |
Author: | LHCb Collaboration Adeva Andany, Bernardo Boente García, Óscar Borsato, Martino Chobanova, Veronika Cid Vidal, Xabier Dosil Suárez, Álvaro Fernández Prieto, Antonio García Plana, Beatriz García Pardiñas, Julián Lucio Martínez, Miriam Martínez Santos, Diego Plo Casasus, Máximo Prisciandaro, James J. Ramos Pernas, Miguel Romero Vidal, Antonio Saborido Silva, Juan José Sanmartín Sedes, Brais Santamarina Ríos, Cibrán Vázquez Regueiro, Pablo Vieites Díaz, María |
Affiliation: | Universidade de Santiago de Compostela. Departamento de Física de Partículas Universidade de Santiago de Compostela. Instituto Galego de Física de Altas Enerxías (IGFAE) |
Subject: | Charm physics | Forward physics | Hadron-Hadron scattering (experiments) | Particle and resonance production | Quarkonium | |
Date of Issue: | 2018 |
Publisher: | Springer |
Citation: | Aaij, R., Adeva, B., Adinolfi, M. et al. Central exclusive production of J/ψ and ψ(2S) mesons in pp collisions at √s=13 TeV. J. High Energ. Phys. 2018, 167 (2018). https://doi.org/10.1007/JHEP10(2018)167 |
Abstract: | Measurements are reported of the central exclusive production of J/ψ and ψ(2S) mesons in pp collisions at a centre-of-mass energy of 13 TeV. Backgrounds are significantly reduced compared to previous measurements made at lower energies through the use of new forward shower counters. The products of the cross-sections and the branching fractions for the decays to dimuons, where both muons are within the pseudorapidity range 2.0 < η < 4.5, are measured to be σJ/ψ→μ+μ−=435±18±11±17 pbσψ(2S)→μ+μ−=11.1±1.1±0.3±0.4 pb. The first uncertainties are statistical, the second are systematic, and the third are due to the luminosity determination. The cross-sections are also measured differentially for meson rapidities between 2.0 and 4.5. Good agreement is observed with theoretical predictions. Photoproduction cross-sections are derived and compared to previous experiments, and a deviation from a pure power-law extrapolation of lower energy data is observed. |
Publisher version: | https://doi.org/10.1007/JHEP10(2018)167 |
URI: | http://hdl.handle.net/10347/22302 |
DOI: | 10.1007/JHEP10(2018)167 |
ISSN: | 1029-8479 |
Rights: | © CERN, for the bene t of the LHCb Collaboration. Article funded by SCOAP3. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. |
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Except where otherwise noted, this item's license is described as © CERN, for the bene t of the LHCb Collaboration. Article funded by SCOAP3. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.