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Measurement of the ηc(1S) production cross-section in p p collisions at s√=13 TeV
dc.contributor | Universitat Ramon Llull. La Salle | |
dc.contributor | CERN | |
dc.contributor.author | Calvo Gómez, Míriam | |
dc.contributor.author | Camboni, Alessandro | |
dc.contributor.author | Vilasís Cardona, Xavier | |
dc.contributor.author | LHCb Collaboration - CERN | |
dc.date.accessioned | 2020-11-23T16:59:01Z | |
dc.date.accessioned | 2023-10-02T06:25:20Z | |
dc.date.available | 2020-11-23T16:59:01Z | |
dc.date.available | 2023-10-02T06:25:20Z | |
dc.date.created | 2019-11 | |
dc.date.issued | 2020-03 | |
dc.identifier.uri | http://hdl.handle.net/20.500.14342/3066 | |
dc.description.abstract | Using a data sample corresponding to an integrated luminosity of 2.0 fb−1, collected by the LHCb experiment, the production of the ηc(1S) state in proton–proton collisions at a centre-of-mass energy of s√=13 TeV is studied in the rapidity range 2.0<y<4.5 and in the transverse momentum range 6.5<pT<14.0GeV. The cross-section for prompt production of ηc(1S) mesons relative to that of the J/ψ meson is measured using the p p¯¯¯ decay mode and is found to be σηc(1S)/σJ/ψ=1.69±0.15±0.10±0.18. The quoted uncertainties are, in order, statistical, systematic and due to uncertainties on the branching fractions of the J/ψ→pp¯¯¯ and ηc→pp¯¯¯ decays. The prompt ηc(1S) production cross-section is determined to be σηc(1S)=1.26±0.11±0.08±0.14μb, where the last uncertainty includes that on the J/ψ meson cross-section. The ratio of the branching fractions of b-hadron decays to the ηc(1S) and J/ψ states is measured to be Bb→ηcX/Bb→J ψX=0.48±0.03±0.03±0.05, where the last uncertainty is due to those on the branching fractions of the J/ψ→pp¯¯¯ and ηc→pp¯¯¯ decays. The difference between the J/ψ and ηc(1S) masses is also determined to be 113.0±0.7±0.1MeV, which is the most precise single measurement of this quantity to date. | eng |
dc.format.extent | 18 p. | cat |
dc.language.iso | eng | cat |
dc.publisher | Springer | cat |
dc.relation.ispartof | The European Phisical Journal C, 2020, 191 | cat |
dc.rights | © CERN | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
dc.source | RECERCAT (Dipòsit de la Recerca de Catalunya) | |
dc.subject.other | Gran col·lisionador d'hadrons (França i Suïssa) | cat |
dc.subject.other | Col·lisions (Física nuclear) | cat |
dc.subject.other | Partícules (Física nuclear) | cat |
dc.title | Measurement of the ηc(1S) production cross-section in p p collisions at s√=13 TeV | cat |
dc.type | info:eu-repo/semantics/article | cat |
dc.type | info:eu-repo/semantics/publishedVersion | cat |
dc.rights.accessLevel | info:eu-repo/semantics/openAccess | |
dc.embargo.terms | cap | cat |
dc.subject.udc | 539 | |
dc.identifier.doi | https://doi.org/10.1140/epjc/s10052-020-7733-0 | cat |