Observation of Diffractive W Boson Production at the Tevatron
高能物理 - 实验
2012-08-27 v1
摘要
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)%.
引用
@article{arxiv.hep-ex/9703010,
title = {Observation of Diffractive W Boson Production at the Tevatron},
author = {CDF Collaboration},
journal= {arXiv preprint arXiv:hep-ex/9703010},
year = {2012}
}
备注
9pp, LaTex file, uses psfig, 3 PS figures, to be published in PRL