Measurement of prompt J/psi pair production in pp collisions at root s = 7 Tev
Production of prompt J/ψ meson pairs in proton-proton collisions at s = 7 TeV is measured with the CMS experiment at the LHC in a data sample corresponding to an integrated luminosity of about 4.7 fb-1. The two J/ψ mesons are fully reconstructed via their decays into μ +μ -pairs. This observation pr...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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Springer Verlag
2014
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| _version_ | 1797105502946066432 |
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| author | Khachatryan, V Sirunyan, A Tumasyan, A Adam, W Bergauer, T Dragicevic, M Eroe, J Fabjan, C Friedl, M Fruehwirth, R Ghete, V Hartl, C Hoermann, N Hrubec, J Jeitler, M Kiesenhofer, W Knuenz, V Krammer, M Kraetschmer, I Liko, D Mikulec, I Rabady, D Rahbaran, B Rohringer, H Schoefbeck, R |
| author_facet | Khachatryan, V Sirunyan, A Tumasyan, A Adam, W Bergauer, T Dragicevic, M Eroe, J Fabjan, C Friedl, M Fruehwirth, R Ghete, V Hartl, C Hoermann, N Hrubec, J Jeitler, M Kiesenhofer, W Knuenz, V Krammer, M Kraetschmer, I Liko, D Mikulec, I Rabady, D Rahbaran, B Rohringer, H Schoefbeck, R |
| author_sort | Khachatryan, V |
| collection | OXFORD |
| description | Production of prompt J/ψ meson pairs in proton-proton collisions at s = 7 TeV is measured with the CMS experiment at the LHC in a data sample corresponding to an integrated luminosity of about 4.7 fb-1. The two J/ψ mesons are fully reconstructed via their decays into μ +μ -pairs. This observation provides for the first time access to the high-transverse-momentum region of J/ψ pair production where model predictions are not yet established. The total and differential cross sections are measured in a phase space defined by the individual J/ψ transverse momentum (p TJ/ψ) and rapidity (|y J/ψ|): |y J/ψ| < 1.2 for p TJ/ψ> 6.5 GeV/c; 1.2 < |y J/ψ| < 1.43 for a p Tthreshold that scales linearly with |y J/ψ| from 6.5 to 4.5 GeV/c; and 1.43 < |y J/ψ| < 2.2 for p TJ/ψ> 4.5 GeV/c. The total cross section, assuming unpolarized prompt J/ψ pair production is 1.49 ± 0.07 (stat) ±0.13 (syst) nb. Different assumptions about the J/ψ polarization imply modifications to the cross section ranging from -31% to +27%. [Figure not available: see fulltext.] |
| first_indexed | 2024-03-07T06:48:30Z |
| format | Journal article |
| id | oxford-uuid:fbad20eb-cb54-461f-8a78-67a79acfe70c |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T06:48:30Z |
| publishDate | 2014 |
| publisher | Springer Verlag |
| record_format | dspace |
| spelling | oxford-uuid:fbad20eb-cb54-461f-8a78-67a79acfe70c2022-03-27T13:15:43ZMeasurement of prompt J/psi pair production in pp collisions at root s = 7 TevJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:fbad20eb-cb54-461f-8a78-67a79acfe70cEnglishSymplectic Elements at OxfordSpringer Verlag2014Khachatryan, VSirunyan, ATumasyan, AAdam, WBergauer, TDragicevic, MEroe, JFabjan, CFriedl, MFruehwirth, RGhete, VHartl, CHoermann, NHrubec, JJeitler, MKiesenhofer, WKnuenz, VKrammer, MKraetschmer, ILiko, DMikulec, IRabady, DRahbaran, BRohringer, HSchoefbeck, RProduction of prompt J/ψ meson pairs in proton-proton collisions at s = 7 TeV is measured with the CMS experiment at the LHC in a data sample corresponding to an integrated luminosity of about 4.7 fb-1. The two J/ψ mesons are fully reconstructed via their decays into μ +μ -pairs. This observation provides for the first time access to the high-transverse-momentum region of J/ψ pair production where model predictions are not yet established. The total and differential cross sections are measured in a phase space defined by the individual J/ψ transverse momentum (p TJ/ψ) and rapidity (|y J/ψ|): |y J/ψ| < 1.2 for p TJ/ψ> 6.5 GeV/c; 1.2 < |y J/ψ| < 1.43 for a p Tthreshold that scales linearly with |y J/ψ| from 6.5 to 4.5 GeV/c; and 1.43 < |y J/ψ| < 2.2 for p TJ/ψ> 4.5 GeV/c. The total cross section, assuming unpolarized prompt J/ψ pair production is 1.49 ± 0.07 (stat) ±0.13 (syst) nb. Different assumptions about the J/ψ polarization imply modifications to the cross section ranging from -31% to +27%. [Figure not available: see fulltext.] |
| spellingShingle | Khachatryan, V Sirunyan, A Tumasyan, A Adam, W Bergauer, T Dragicevic, M Eroe, J Fabjan, C Friedl, M Fruehwirth, R Ghete, V Hartl, C Hoermann, N Hrubec, J Jeitler, M Kiesenhofer, W Knuenz, V Krammer, M Kraetschmer, I Liko, D Mikulec, I Rabady, D Rahbaran, B Rohringer, H Schoefbeck, R Measurement of prompt J/psi pair production in pp collisions at root s = 7 Tev |
| title | Measurement of prompt J/psi pair production in pp collisions at root s = 7 Tev |
| title_full | Measurement of prompt J/psi pair production in pp collisions at root s = 7 Tev |
| title_fullStr | Measurement of prompt J/psi pair production in pp collisions at root s = 7 Tev |
| title_full_unstemmed | Measurement of prompt J/psi pair production in pp collisions at root s = 7 Tev |
| title_short | Measurement of prompt J/psi pair production in pp collisions at root s = 7 Tev |
| title_sort | measurement of prompt j psi pair production in pp collisions at root s 7 tev |
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