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/ψ...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022
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| Online Access: | https://hdl.handle.net/1721.1/134196.2 |
| _version_ | 1811077169826234368 |
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| author | The LHCb Collaboration Counts, Ian Thomas Hunt Ilten, Philip J Williams, Michael |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics The LHCb Collaboration Counts, Ian Thomas Hunt Ilten, Philip J Williams, Michael |
| author_sort | The LHCb Collaboration |
| collection | MIT |
| description | © 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. |
| first_indexed | 2024-09-23T10:38:57Z |
| format | Article |
| id | mit-1721.1/134196.2 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T10:38:57Z |
| publishDate | 2022 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/134196.22022-09-21T20:13:59Z Observation of charmonium pairs produced exclusively in pp collisions The LHCb Collaboration Counts, Ian Thomas Hunt Ilten, Philip J Williams, Michael Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science © 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. 2022-09-21T20:13:58Z 2021-10-27T20:03:56Z 2022-09-21T20:13:58Z 2014 2021-04-05T16:10:49Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/134196.2 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/octet-stream IOP Publishing IOP Publishing |
| spellingShingle | The LHCb Collaboration Counts, Ian Thomas Hunt Ilten, Philip J Williams, Michael Observation of charmonium pairs produced exclusively in pp collisions |
| title | Observation of charmonium pairs produced exclusively in pp collisions |
| title_full | Observation of charmonium pairs produced exclusively in pp collisions |
| title_fullStr | Observation of charmonium pairs produced exclusively in pp collisions |
| title_full_unstemmed | Observation of charmonium pairs produced exclusively in pp collisions |
| title_short | Observation of charmonium pairs produced exclusively in pp collisions |
| title_sort | observation of charmonium pairs produced exclusively in pp collisions |
| url | https://hdl.handle.net/1721.1/134196.2 |
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