Observation of diffractive j/ψ production at the fermilab tevatron

CDF Collaboration

Research output: Contribution to journalArticle

Abstract

We report the first observation of diffractive J/ψ(→μ+μ) production in pp collisions at √ = 1.8 TeV. Diffractive events are identified by their rapidity gap signature. In a sample of events with two muons of transverse momentum pT μ > 2GeV/c within the pseudorapidity region |η| < 1.0, the ratio of diffractive to total J/ψ production rates is found to be RJ/ψ = [1.45 ± 0.25]%. The ratio RJ/ψ(x) is presented as a function of x-Bjorken. By combining it with our previously measured corresponding ratio Rjj(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.

Original languageEnglish
Pages (from-to)241802-1-241802-6
JournalPhysical Review Letters
Volume87
Issue number24
DOIs
Publication statusPublished - 2001 Dec 10

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transverse momentum
muons
signatures
collisions
protons

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Observation of diffractive j/ψ production at the fermilab tevatron. / CDF Collaboration.

In: Physical Review Letters, Vol. 87, No. 24, 10.12.2001, p. 241802-1-241802-6.

Research output: Contribution to journalArticle

CDF Collaboration. / Observation of diffractive j/ψ production at the fermilab tevatron. In: Physical Review Letters. 2001 ; Vol. 87, No. 24. pp. 241802-1-241802-6.
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abstract = "We report the first observation of diffractive J/ψ(→μ+μ−) production in pp collisions at √ = 1.8 TeV. Diffractive events are identified by their rapidity gap signature. In a sample of events with two muons of transverse momentum pT μ > 2GeV/c within the pseudorapidity region |η| < 1.0, the ratio of diffractive to total J/ψ production rates is found to be RJ/ψ = [1.45 ± 0.25]{\%}. The ratio RJ/ψ(x) is presented as a function of x-Bjorken. By combining it with our previously measured corresponding ratio Rjj(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.",
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AU - Bachacou, H.

AU - Bailey, S.

AU - De Barbaro, P.

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AU - Bauer, G.

AU - Bedeschi, F.

AU - Belforte, S.

AU - Bell, W. H.

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AU - Berge, J. P.

AU - Berryhill, J.

AU - Bhatti, A.

AU - Binkley, M.

AU - Bisello, D.

AU - Bishai, M.

AU - Blair, R. E.

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N2 - We report the first observation of diffractive J/ψ(→μ+μ−) production in pp collisions at √ = 1.8 TeV. Diffractive events are identified by their rapidity gap signature. In a sample of events with two muons of transverse momentum pT μ > 2GeV/c within the pseudorapidity region |η| < 1.0, the ratio of diffractive to total J/ψ production rates is found to be RJ/ψ = [1.45 ± 0.25]%. The ratio RJ/ψ(x) is presented as a function of x-Bjorken. By combining it with our previously measured corresponding ratio Rjj(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.

AB - We report the first observation of diffractive J/ψ(→μ+μ−) production in pp collisions at √ = 1.8 TeV. Diffractive events are identified by their rapidity gap signature. In a sample of events with two muons of transverse momentum pT μ > 2GeV/c within the pseudorapidity region |η| < 1.0, the ratio of diffractive to total J/ψ production rates is found to be RJ/ψ = [1.45 ± 0.25]%. The ratio RJ/ψ(x) is presented as a function of x-Bjorken. By combining it with our previously measured corresponding ratio Rjj(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.

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