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±17pbσψ(2S)→μ+μ−=11.1±1.1±0.3±0.4pb. 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.[Figure not available: see fulltext.]
| Original language | English |
|---|---|
| Article number | 167 |
| Journal | Journal of High Energy Physics |
| Volume | 2018 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 1 Oct 2018 |
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Keywords
- Charm physics
- Forward physics
- Hadron-Hadron scattering (experiments)
- Particle and resonance production
- Quarkonium
ASJC Scopus subject areas
- Nuclear and High Energy Physics
Cite this
Central exclusive production of J/ψ and ψ(2S) mesons in pp collisions at √s=13 TeV. / The LHCb Collaboration.
In: Journal of High Energy Physics, Vol. 2018, No. 10, 167, 01.10.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Central exclusive production of J/ψ and ψ(2S) mesons in pp collisions at √s=13 TeV
AU - The LHCb Collaboration
AU - Aaij, R.
AU - Adeva, B.
AU - Adinolfi, M.
AU - Aidala, C. A.
AU - Ajaltouni, Z.
AU - Akar, S.
AU - Albicocco, P.
AU - Albrecht, J.
AU - Alessio, F.
AU - Alexander, M.
AU - Alfonso Albero, A.
AU - Ali, S.
AU - Alkhazov, G.
AU - Alvarez Cartelle, P.
AU - Alves, A. A.
AU - Amato, S.
AU - Amerio, S.
AU - Amhis, Y.
AU - An, L.
AU - Anderlini, L.
AU - Andreassi, G.
AU - Andreotti, M.
AU - Andrews, J. E.
AU - Appleby, R. B.
AU - Archilli, F.
AU - d’Argent, P.
AU - Arnau Romeu, J.
AU - Artamonov, A.
AU - Artuso, M.
AU - Arzymatov, K.
AU - Aslanides, E.
AU - Atzeni, M.
AU - Bachmann, S.
AU - Back, J. J.
AU - Baker, S.
AU - Balagura, V.
AU - Baldini, W.
AU - Baranov, A.
AU - Barlow, R. J.
AU - Barsuk, S.
AU - Barter, W.
AU - Baryshnikov, F.
AU - Batozskaya, V.
AU - Batsukh, B.
AU - Battista, V.
AU - Bay, A.
AU - Beddow, J.
AU - Mazurov, A.
AU - Petrov, A.
AU - Strokov, S.
PY - 2018/10/1
Y1 - 2018/10/1
N2 - 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±17pbσψ(2S)→μ+μ−=11.1±1.1±0.3±0.4pb. 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.[Figure not available: see fulltext.]
AB - 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±17pbσψ(2S)→μ+μ−=11.1±1.1±0.3±0.4pb. 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.[Figure not available: see fulltext.]
KW - Charm physics
KW - Forward physics
KW - Hadron-Hadron scattering (experiments)
KW - Particle and resonance production
KW - Quarkonium
UR - http://www.scopus.com/inward/record.url?scp=85055642421&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85055642421&partnerID=8YFLogxK
U2 - 10.1007/JHEP10(2018)167
DO - 10.1007/JHEP10(2018)167
M3 - Article
VL - 2018
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
SN - 1126-6708
IS - 10
M1 - 167
ER -