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Observation of diffractive J/psi production at the Fermilab Tevatron

Affolder, T; Akimoto, H; Akopian, A; Albrow, MG; Amaral, P; Amidei, D; Anikeev, K; ... CDF Collaboration, .; + view all (2001) Observation of diffractive J/psi production at the Fermilab Tevatron. Physical Review Letters , 8724 (24) , Article 241802. 10.1103/PhysRevLett.87.241802. Green open access

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Abstract

We report the first observation of diffractive J/psi(--> mu (+)mu (-)) production in <(p)power bar> collisions at roots = 1.8 TeV. Diffractive events are identified by their rapidity gap signature. In a sample of events with two muons of transverse momentum p(T)(mu) > 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]%. ne 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.

Type: Article
Title: Observation of diffractive J/psi production at the Fermilab Tevatron
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.87.241802
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.87.241802
Language: English
Additional information: © 2001 The American Physical Society
Keywords: SILICON VERTEX DETECTOR, DIJET PRODUCTION, CDF
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/409061
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