Observation of diffractive J/psi production at the Fermilab Tevatron.
We report the first observation of diffractive J/psi(--> mu+mu-) production in pp collisions at root square[s] = 1.8 TeV. Diffractive events are identified by their rapidity gap signature. In a sample of events with two muons of transverse momentum p(mu)T>2 GeV/c within the pseudorapid...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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2001
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| _version_ | 1826260497237803008 |
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| author | Affolder, T Akimoto, H Akopian, A Albrow, MG Amaral, P Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Asakawa, T Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Bailey, S de Barbaro, P Barbaro-Galtieri, A Barnes, V Barnett, B Baroiant, S Barone, M Bauer, G |
| author_facet | Affolder, T Akimoto, H Akopian, A Albrow, MG Amaral, P Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Asakawa, T Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Bailey, S de Barbaro, P Barbaro-Galtieri, A Barnes, V Barnett, B Baroiant, S Barone, M Bauer, G |
| author_sort | Affolder, T |
| collection | OXFORD |
| description | We report the first observation of diffractive J/psi(--> mu+mu-) production in pp collisions at root square[s] = 1.8 TeV. Diffractive events are identified by their rapidity gap signature. In a sample of events with two muons of transverse momentum p(mu)T>2 GeV/c within the pseudorapidity region /eta/ < 1.0, the ratio of diffractive to total J/psi production rates is found to be R(J/psi) = [1.45 +/- 0.25]%. The ratio R(J/psi)(x) is presented as a function of x-Bjorken. By combining it with our previously measured corresponding ratio R(jj)(x) for diffractive dijet production, we extract a value of 0.59 +/- 0.15 for the gluon fraction of the diffractive structure function of the proton. |
| first_indexed | 2024-03-06T19:06:34Z |
| format | Journal article |
| id | oxford-uuid:1558879f-c14d-4efa-8872-9c07ad768b93 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:06:34Z |
| publishDate | 2001 |
| record_format | dspace |
| spelling | oxford-uuid:1558879f-c14d-4efa-8872-9c07ad768b932022-03-26T10:24:57ZObservation of diffractive J/psi production at the Fermilab Tevatron.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:1558879f-c14d-4efa-8872-9c07ad768b93EnglishSymplectic Elements at Oxford2001Affolder, TAkimoto, HAkopian, AAlbrow, MGAmaral, PAmidei, DAnikeev, KAntos, JApollinari, GArisawa, TArtikov, AAsakawa, TAshmanskas, WAzfar, FAzzi-Bacchetta, PBacchetta, NBachacou, HBailey, Sde Barbaro, PBarbaro-Galtieri, ABarnes, VBarnett, BBaroiant, SBarone, MBauer, GWe report the first observation of diffractive J/psi(--> mu+mu-) production in pp collisions at root square[s] = 1.8 TeV. Diffractive events are identified by their rapidity gap signature. In a sample of events with two muons of transverse momentum p(mu)T>2 GeV/c within the pseudorapidity region /eta/ < 1.0, the ratio of diffractive to total J/psi production rates is found to be R(J/psi) = [1.45 +/- 0.25]%. The ratio R(J/psi)(x) is presented as a function of x-Bjorken. By combining it with our previously measured corresponding ratio R(jj)(x) for diffractive dijet production, we extract a value of 0.59 +/- 0.15 for the gluon fraction of the diffractive structure function of the proton. |
| spellingShingle | Affolder, T Akimoto, H Akopian, A Albrow, MG Amaral, P Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Asakawa, T Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Bailey, S de Barbaro, P Barbaro-Galtieri, A Barnes, V Barnett, B Baroiant, S Barone, M Bauer, G Observation of diffractive J/psi production at the Fermilab Tevatron. |
| title | Observation of diffractive J/psi production at the Fermilab Tevatron. |
| title_full | Observation of diffractive J/psi production at the Fermilab Tevatron. |
| title_fullStr | Observation of diffractive J/psi production at the Fermilab Tevatron. |
| title_full_unstemmed | Observation of diffractive J/psi production at the Fermilab Tevatron. |
| title_short | Observation of diffractive J/psi production at the Fermilab Tevatron. |
| title_sort | observation of diffractive j psi production at the fermilab tevatron |
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