Measurement of the η c (1S) production cross-section in p p collisions at √s = 13 TeV
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 r...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Springer Science and Business Media LLC
2022
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| Online Access: | https://hdl.handle.net/1721.1/134339.2 |
| _version_ | 1811094305813561344 |
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| author | The LHCb Collaboration Boettcher, Thomas Julian Craik, Daniel C Weisser, Constantin Williams, Michael |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics The LHCb Collaboration Boettcher, Thomas Julian Craik, Daniel C Weisser, Constantin Williams, Michael |
| author_sort | The LHCb Collaboration |
| collection | MIT |
| description | 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 < 14.0 GeV. 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 → p p and ηc → p p decays. The prompt ηc(1S) production cross-section is determined to be σηc (1S) = 1.26 ± 0.11 ± 0.08 ± 0.14 μb, 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→ηc X /Bb→J/ψ X = 0.48 ± 0.03 ± 0.03 ± 0.05, where the last uncertainty is due to those on the branching fractions of the J/ψ → p p and ηc → p p decays. The difference between the J/ψ and ηc(1S) masses is also determined to be 113.0 ± 0.7 ± 0.1 MeV, which is the most precise single measurement of this quantity to date. |
| first_indexed | 2024-09-23T15:57:56Z |
| format | Article |
| id | mit-1721.1/134339.2 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:57:56Z |
| publishDate | 2022 |
| publisher | Springer Science and Business Media LLC |
| record_format | dspace |
| spelling | mit-1721.1/134339.22022-12-21T15:03:57Z Measurement of the η c (1S) production cross-section in p p collisions at √s = 13 TeV The LHCb Collaboration Boettcher, Thomas Julian Craik, Daniel C Weisser, Constantin Williams, Michael Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science 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 < 14.0 GeV. 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 → p p and ηc → p p decays. The prompt ηc(1S) production cross-section is determined to be σηc (1S) = 1.26 ± 0.11 ± 0.08 ± 0.14 μb, 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→ηc X /Bb→J/ψ X = 0.48 ± 0.03 ± 0.03 ± 0.05, where the last uncertainty is due to those on the branching fractions of the J/ψ → p p and ηc → p p decays. The difference between the J/ψ and ηc(1S) masses is also determined to be 113.0 ± 0.7 ± 0.1 MeV, which is the most precise single measurement of this quantity to date. 2022-12-21T15:03:56Z 2021-10-27T20:04:30Z 2022-12-21T15:03:56Z 2020 2021-04-29T15:44:07Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/134339.2 en 10.1140/EPJC/S10052-020-7733-0 The European Physical Journal C - Particles and Fields Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/octet-stream Springer Science and Business Media LLC Springer |
| spellingShingle | The LHCb Collaboration Boettcher, Thomas Julian Craik, Daniel C Weisser, Constantin Williams, Michael Measurement of the η c (1S) production cross-section in p p collisions at √s = 13 TeV |
| title | Measurement of the η c (1S) production cross-section in p p collisions at √s = 13 TeV |
| title_full | Measurement of the η c (1S) production cross-section in p p collisions at √s = 13 TeV |
| title_fullStr | Measurement of the η c (1S) production cross-section in p p collisions at √s = 13 TeV |
| title_full_unstemmed | Measurement of the η c (1S) production cross-section in p p collisions at √s = 13 TeV |
| title_short | Measurement of the η c (1S) production cross-section in p p collisions at √s = 13 TeV |
| title_sort | measurement of the η c 1s production cross section in p p collisions at √s 13 tev |
| url | https://hdl.handle.net/1721.1/134339.2 |
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