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DC Field | Value | Language |
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dc.contributor.author | Badalov, A. | - |
dc.contributor.author | Garrido Beltrán, Lluís | - |
dc.contributor.author | Graciani Diaz, Ricard | - |
dc.contributor.author | Graugés Pous, Eugeni | - |
dc.contributor.author | Marin Benito, Carla | - |
dc.contributor.author | Picatoste Olloqui, E. | - |
dc.contributor.author | Rives Molina, V. | - |
dc.contributor.author | Ruiz, Hugo | - |
dc.contributor.author | LHCb collaboration | - |
dc.date.accessioned | 2022-05-19T14:52:05Z | - |
dc.date.available | 2022-05-19T14:52:05Z | - |
dc.date.issued | 2015-07-04 | - |
dc.identifier.issn | 1434-6044 | - |
dc.identifier.uri | http://hdl.handle.net/2445/185768 | - |
dc.description.abstract | The production of the ηc(1S) state in proton-proton collisions is probed via its decay to the pp final state with the LHCb detector, in the rapidity range 2.0 < y < 4.5 and in the meson transverse-momentum range pT > 6.5 GeV/c. The cross-section for prompt production of ηc(1S) mesons relative to the prompt J/ψ cross-section is measured, for the first time, to be σηc(1S)/σJ/ψ = 1.74±0.29±0.28±0.18B at a centreof-mass energy √ s = 7 TeV using data corresponding to an integrated luminosity of 0.7 fb−1 , and σηc(1S)/σJ/ψ = 1.60 ± 0.29 ± 0.25 ± 0.17B at √ s = 8 TeV using 2.0 fb−1 . The uncertainties quoted are, in order, statistical, systematic, and that on the ratio of branching fractions of the ηc(1S) and J/ψ decays to the pp final state. In addition, the inclusive branching fraction of b-hadron decays into ηc(1S) mesons is measured, for the first time, to be B(b → ηcX) = (4.88 ± 0.64 ± 0.29 ± 0.67B) × 10−3 , where the third uncertainty includes also the uncertainty on the J/ψ inclusive branching fraction from b-hadron decays. The difference between the J/ψ and ηc(1S) meson masses is determined to be 114.7 ± 1.5 ± 0.1 MeV/c2 . | - |
dc.format.extent | 22 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Società Italiana di Fisica & Springer Verlag | - |
dc.relation.isformatof | Reproducció del document publicat a: https://doi.org/10.1140/epjc/s10052-015-3502-x | - |
dc.relation.ispartof | European Physical Journal C, 2015, vol. 75, num. 311, p. 1-12 | - |
dc.relation.uri | https://doi.org/10.1140/epjc/s10052-015-3502-x | - |
dc.rights | cc-by (c) Badalov, A. et al., 2015 | - |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Hadrons | - |
dc.subject.classification | Gran Col·lisionador d'Hadrons | - |
dc.subject.classification | Física de partícules | - |
dc.subject.classification | Experiments | - |
dc.subject.other | Hadrons | - |
dc.subject.other | Large Hadron Collider (France and Switzerland) | - |
dc.subject.other | Particle physics | - |
dc.subject.other | Experiments | - |
dc.title | Measurement of the (eta c)(1S) production cross-section in proton-proton collisions via the decay (eta c)(1S) -> p(p)over-bar | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 656772 | - |
dc.date.updated | 2022-05-19T14:52:05Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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656772.pdf | 1.02 MB | Adobe PDF | View/Open |
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