@article{b20b1cab83754284b791737a2641206a,
title = "Observation of diffractive j/ψ production at the fermilab tevatron",
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 pTμ > 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.",
author = "{CDF Collaboration} and T. Affolder and H. Akimoto and A. Akopian and Albrow, {M. G.} and P. Amaral and D. Amidei and K. Anikeev and J. Antos and G. Apollinari and T. Arisawa and A. Artikov and T. Asakawa and W. Ashmanskas and F. Azfar and P. Azzi-Bacchetta and N. Bacchetta and H. Bachacou and S. Bailey and {De Barbaro}, P. and A. Barbaro-Galtieri and Barnes, {V. E.} and Barnett, {B. A.} and S. Baroiant and M. Barone and G. Bauer and F. Bedeschi and S. Belforte and Bell, {W. H.} and G. Bellettini and J. Bellinger and D. Benjamin and J. Bensinger and A. Beretvas and Berge, {J. P.} and J. Berryhill and A. Bhatti and M. Binkley and D. Bisello and M. Bishai and Blair, {R. E.} and C. Blocker and K. Bloom and B. Blumenfeld and Blusk, {S. R.} and A. Bocci and A. Bodek and W. Bokhari and G. Bolla and Y. Bonushkin and M. Tanaka",
year = "2001",
month = dec,
day = "10",
doi = "10.1103/PhysRevLett.87.241802",
language = "English",
volume = "87",
pages = "241802--1--241802--6",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "24",
}