Exclusive photoproduction of J/ψ mesons at HERA
The exclusive photoproduction of J/ψ mesons, γp → J/ψp, has been studied in ep collisions with the ZEUS detector at HERA, in the kinematic range 20 < W < 290 GeV, where W is the photon-proton centre-of-mass energy. The J/ψ mesons were reconstructed in the ninon and the electron decay c...
| প্রধান লেখক: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| বিন্যাস: | Journal article |
| ভাষা: | English |
| প্রকাশিত: |
2002
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| _version_ | 1826260512228245504 |
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| author | Chekanov, S Krakauer, D Magill, S Musgrave, B Pellegrino, A Repond, J Yoshida, R Mattingly, M Antonioli, P Bari, G Basile, M Bellagamba, L Boscherini, D Bruni, A Bruni, G Cara Romeo, G Cifarelli, L Cindolo, F Contin, A Corradi, M De Pasquale, S Giusti, P Iacobucci, G Levi, G Margotti, A |
| author_facet | Chekanov, S Krakauer, D Magill, S Musgrave, B Pellegrino, A Repond, J Yoshida, R Mattingly, M Antonioli, P Bari, G Basile, M Bellagamba, L Boscherini, D Bruni, A Bruni, G Cara Romeo, G Cifarelli, L Cindolo, F Contin, A Corradi, M De Pasquale, S Giusti, P Iacobucci, G Levi, G Margotti, A |
| author_sort | Chekanov, S |
| collection | OXFORD |
| description | The exclusive photoproduction of J/ψ mesons, γp → J/ψp, has been studied in ep collisions with the ZEUS detector at HERA, in the kinematic range 20 < W < 290 GeV, where W is the photon-proton centre-of-mass energy. The J/ψ mesons were reconstructed in the ninon and the electron decay channels using integrated luminosities of 38 pb-1 and 55 pb-1, respectively. The helicity structure of J/ψ production shows that the hypothesis of s-channel helicity conservation is satisfied within two standard deviations. The total cross section and the differential cross-section dσ/dt, where t is the squared four-momentum transfer at the proton vertex, are presented as a function of W, for |t| < 18 Ge2. The t distribution exhibits an exponential shape with a slope parameter increasing logarithmically with W with a value b = 4.15 ± 0.05(stat.)-0.18+0.30(syst.) GeV-2 at W = 90 GeV. The effective parameters of the Pomeron trajectory are αℙ(0) = 1.200 ± 0.009(stat.) -0.010+0.004(Syst.) and α′ℙ = 0.115 ± 0.018(stat.)-0.015+0.008(syst.) GeV-2. |
| first_indexed | 2024-03-06T19:06:48Z |
| format | Journal article |
| id | oxford-uuid:156bda02-7904-4888-b513-ae976145ac98 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:06:48Z |
| publishDate | 2002 |
| record_format | dspace |
| spelling | oxford-uuid:156bda02-7904-4888-b513-ae976145ac982022-03-26T10:25:23ZExclusive photoproduction of J/ψ mesons at HERAJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:156bda02-7904-4888-b513-ae976145ac98EnglishSymplectic Elements at Oxford2002Chekanov, SKrakauer, DMagill, SMusgrave, BPellegrino, ARepond, JYoshida, RMattingly, MAntonioli, PBari, GBasile, MBellagamba, LBoscherini, DBruni, ABruni, GCara Romeo, GCifarelli, LCindolo, FContin, ACorradi, MDe Pasquale, SGiusti, PIacobucci, GLevi, GMargotti, AThe exclusive photoproduction of J/ψ mesons, γp → J/ψp, has been studied in ep collisions with the ZEUS detector at HERA, in the kinematic range 20 < W < 290 GeV, where W is the photon-proton centre-of-mass energy. The J/ψ mesons were reconstructed in the ninon and the electron decay channels using integrated luminosities of 38 pb-1 and 55 pb-1, respectively. The helicity structure of J/ψ production shows that the hypothesis of s-channel helicity conservation is satisfied within two standard deviations. The total cross section and the differential cross-section dσ/dt, where t is the squared four-momentum transfer at the proton vertex, are presented as a function of W, for |t| < 18 Ge2. The t distribution exhibits an exponential shape with a slope parameter increasing logarithmically with W with a value b = 4.15 ± 0.05(stat.)-0.18+0.30(syst.) GeV-2 at W = 90 GeV. The effective parameters of the Pomeron trajectory are αℙ(0) = 1.200 ± 0.009(stat.) -0.010+0.004(Syst.) and α′ℙ = 0.115 ± 0.018(stat.)-0.015+0.008(syst.) GeV-2. |
| spellingShingle | Chekanov, S Krakauer, D Magill, S Musgrave, B Pellegrino, A Repond, J Yoshida, R Mattingly, M Antonioli, P Bari, G Basile, M Bellagamba, L Boscherini, D Bruni, A Bruni, G Cara Romeo, G Cifarelli, L Cindolo, F Contin, A Corradi, M De Pasquale, S Giusti, P Iacobucci, G Levi, G Margotti, A Exclusive photoproduction of J/ψ mesons at HERA |
| title | Exclusive photoproduction of J/ψ mesons at HERA |
| title_full | Exclusive photoproduction of J/ψ mesons at HERA |
| title_fullStr | Exclusive photoproduction of J/ψ mesons at HERA |
| title_full_unstemmed | Exclusive photoproduction of J/ψ mesons at HERA |
| title_short | Exclusive photoproduction of J/ψ mesons at HERA |
| title_sort | exclusive photoproduction of j ψ mesons at hera |
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