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1811095230895620096
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MIT
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© CERN 2014 On behalf of the LHCb Collaboration. A search is performed for the central exclusive production of pairs of charmonia produced in proton-proton collisions. Using data corresponding to an integrated luminosity of 3 fb -1 collected at centre-of-mass energies of 7 and 8 TeV, J/ψJ/ψ and J/ψψ (2S) pairs are observed, which have been produced in the absence of any other activity inside the LHCb acceptance that is sensitive to charged particles in the pseudorapidity ranges (-3.5, -1.5) and (1.5, 5.0). Searches are also performed for pairs of P-wave charmonia and limits are set on their production. The cross-sections for these processes, where the dimeson system has a rapidity between 2.0 and 4.5, are measured to be σ J/ψJ/ψ = 58 ± 10(stat) ± 6(syst) pb, σ J/ψψ(2S) = 63 -18+27 (stat) ± 10(syst) pb, σ ψ(2S)ψ(2S) < 237 pb, σ χc0χc0 < 69 nb, σ χc1χc1 < 45 pb, σ χc2χc2 141 pb, where the upper limits are set at the 90% confidence level. The measured J/ψJ/ψ and J/ψψ (2S) cross-sections are consistent with theoretical expectations.
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2024-09-23T16:13:10Z
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Article
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mit-1721.1/134196
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Massachusetts Institute of Technology
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English
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2024-09-23T16:13:10Z
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2021
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IOP Publishing
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dspace
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mit-1721.1/1341962022-04-01T17:20:48Z Observation of charmonium pairs produced exclusively in pp collisions © CERN 2014 On behalf of the LHCb Collaboration. A search is performed for the central exclusive production of pairs of charmonia produced in proton-proton collisions. Using data corresponding to an integrated luminosity of 3 fb -1 collected at centre-of-mass energies of 7 and 8 TeV, J/ψJ/ψ and J/ψψ (2S) pairs are observed, which have been produced in the absence of any other activity inside the LHCb acceptance that is sensitive to charged particles in the pseudorapidity ranges (-3.5, -1.5) and (1.5, 5.0). Searches are also performed for pairs of P-wave charmonia and limits are set on their production. The cross-sections for these processes, where the dimeson system has a rapidity between 2.0 and 4.5, are measured to be σ J/ψJ/ψ = 58 ± 10(stat) ± 6(syst) pb, σ J/ψψ(2S) = 63 -18+27 (stat) ± 10(syst) pb, σ ψ(2S)ψ(2S) < 237 pb, σ χc0χc0 < 69 nb, σ χc1χc1 < 45 pb, σ χc2χc2 141 pb, where the upper limits are set at the 90% confidence level. The measured J/ψJ/ψ and J/ψψ (2S) cross-sections are consistent with theoretical expectations. 2021-10-27T20:03:56Z 2021-10-27T20:03:56Z 2014 2021-04-05T16:10:49Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/134196 Aaij, R., et al. "Observation of Charmonium Pairs Produced Exclusively in Collisions." Journal of Physics G: Nuclear and Particle Physics 41 11 (2014): 115002 (17 pp.). en 10.1088/0954-3899/41/11/115002 Journal of Physics G: Nuclear and Particle Physics Creative Commons Attribution 3.0 unported license https://creativecommons.org/licenses/by/3.0/ application/pdf IOP Publishing IOP Publishing
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| spellingShingle |
Observation of charmonium pairs produced exclusively in pp collisions
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| title |
Observation of charmonium pairs produced exclusively in pp collisions
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| title_full |
Observation of charmonium pairs produced exclusively in pp collisions
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| title_fullStr |
Observation of charmonium pairs produced exclusively in pp collisions
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| title_full_unstemmed |
Observation of charmonium pairs produced exclusively in pp collisions
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| title_short |
Observation of charmonium pairs produced exclusively in pp collisions
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| title_sort |
observation of charmonium pairs produced exclusively in pp collisions
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| url |
https://hdl.handle.net/1721.1/134196
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