Diffractive W and Z Production at the Fermilab Tevatron

Abstract

We report on a measurement of the fraction of events with a W or Z boson which are produced diffractively in antiproton-proton collisions at a center of mass energy of 1.96 TeV, using data from 0.6 inverse femtobarns of integrated luminosity collected with the CDF-II detector equipped with a Roman-pot spectrometer that detects the antiproton (pbar) from pbar+p --> pbar+[X+W/Z]. We find that (1.00+/- 0.11)% of Ws and (0.88+/-0.22)% of Zs are produced diffractively in a region of antiproton or proton fractional momentum loss (ξ) of 0.03<ξ<0.10 and 4-momentum transferred squared t of -1<t<0 (GeV/c)^2, where we account for the events in which the proton scatters diffractively while the antiproton dissociates, pbar+p --> [X+W/Z]+p, by doubling the measured proton dissociation fraction. We also report on searches for W and Z production in double Pomeron exchange, p+pbar --> p+[X+W/Z]+pbar, and on exclusive Z production, pbar+p --> pbar+Z+p. No signal is seen above background for these processes, and comparisons are made with expectations.

10 pages, 6 figures

References in corpus (9)

• Measurements of Inclusive W and Z Cross Sections in p-pbar Collisions at sqrt{s} =1.96 TeV
• First Measurements of Inclusive W and Z Cross Sections from Run II of the Tevatron Collider
• Observation of Diffractive W Boson Production at the Tevatron
• Observation of Exclusive Dijet Production at the Fermilab Tevatron p-pbar Collider
• Search for exclusive Z boson production and observation of high mass ppbar->gammagamma->p+ll+pbar events in ppbar collisions at sqrt(s) = 1.96 TeV
• Diffractive Dijet Production at sqrt(s)=630 and 1800 GeV at the Fermilab Tevatron
• Observation of Diffractively Produced W and Z Bosons in pbar-p Collisions at root-s = 1800 GeV
• Observation of Diffractive $J/\psi$ Production at the Fermilab Tevatron
• The Physics of a Sextet Quark Sector

Cited by in corpus (20)

• Hard Diffraction with Dynamic Gap Survival
• Hard diffraction in photoproduction with Pythia 8
• Diffractive gauge bosons production beyond QCD factorisation
• Diffractive Dijet Production in Antiproton-Proton Collisions at $\sqrt{s}$=1.96 TeV
• Forward Energy Flow, Central Charged-Particle Multiplicities, and Pseudorapidity Gaps in W and Z Boson Events from pp Collisions at 7 TeV
• Diffractive W production at hadron colliders as a test of colour singlet exchange mechanisms
• Hard hadronic diffraction is not hard
• Associated production of one particle and a Drell-Yan pair in hadronic collisions
• Diffractive Bremsstrahlung in Hadronic Collisions
• Hard diffractive ${\eta }_{\mathrm{c},\mathrm{b}}$ hadroproduction at the LHC
• Testing Pomeron flavour symmetry with diffractive W charge asymmetry
• Diffractive Higgsstrahlung
• Central exclusive production at the Tevatron
• Inclusive diffractive ${\eta }_{\mathrm{c}}$ production in pp, pA and AA modes at the LHC
• Single diffractive production of open heavy flavor mesons
• Review of physics results from the Tevatron: QCD physics
• Probing the diffractive production of Z boson pair at forward rapidities at the LHC
• Recent CMS Results on Diffraction
• Single-diffractive production of dijets within the $k_t$-factorization approach
• Experimental results on diffraction at CDF