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- W2149954779 abstract "In CDF we have observed the reactions p+p¯→p+X+p¯, with X being a centrally produced J/ψ, ψ(2S), or χc0, and γγ→μ+μ− in pp¯ collisions at s=1.96 TeV. The event signature requires two oppositely charged central muons, and either no other particles or one additional photon detected. Exclusive vector meson production is as expected for elastic photoproduction, γ+p→J/ψ(ψ(2S))+p, observed here for the first time in hadron-hadron collisions. We also observe exclusive χc0→J/ψ+γ. The cross sections dσdy|y=0 for J/ψ, ψ(2S), and χc0 are 3.92±0.25(stat)±0.52(syst) nb, 0.53±0.09(stat)±0.10(syst) nb, and 76±10(stat)±10(syst) nb, respectively, and the continuum is consistent with QED. We put an upper limit on the cross section for Odderon exchange in exclusive J/ψ production.Received 16 February 2009DOI:https://doi.org/10.1103/PhysRevLett.102.242001©2009 American Physical Society" @default.
- W2149954779 created "2016-06-24" @default.
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