Observation of Diffractive W Boson Production at the Tevatron

Details Observation of Diffractive W Boson Production at the Tevatron Observation of Diffractive W Boson Production at the Tevatron

1997-03-20

arxiv.org/abs/hep-ex/9703010v1

Phys.Rev.Lett.78:2698-2703,1997

Physics

High Energy Physics

High Energy Physics - Experiment

9pp, LaTex file, uses psfig, 3 PS figures, to be published in PRL

Scientific paper

10.1103/PhysRevLett.78.2698

We report the first observation of diffractively produced W bosons. In a sample of W -> e nu events produced in p-barp collisions at sqrt{s}=1.8 TeV, we find an excess of events with a forward rapidity gap, which is attributed to diffraction. The probability that this excess is consistent with non-diffractive production is 1.1 10^{-4} (3.8 sigma). The relatively low fraction of W+Jet events observed within this excess implies that mainly quarks from the pomeron, which mediates diffraction, participate in W production. The diffractive to non-diffractive W production ratio is found to be R_W=(1.15 +/- 0.55)%.

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