We report on a measurement of the fraction of events with a W or Z boson which are produced diffractively in (p) over bar p collisions at root s = 1.96 TeV, using data from 0.6 fb(-1) of integrated luminosity collected with the CDF II detector equipped with a Roman-pot spectrometer that detects the (p) over bar from (p) over bar + p -> (p) over bar + [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 xi of 0.03 < xi < 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, (p) over bar + 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) over bar + p -> [X + W/Z] + p, and on exclusive Z production, (p) over bar + p -> (p) over bar + Z + p. No signal is seen above background for these processes, and comparisons are made with expectations.

T., A., B. A., G., S., A., D., A., A., A., A., A., et al. (2010). Diffractive W and Z production at the Fermilab Tevatron. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 82(11), 112004-1-112004-10 [10.1103/PhysRevD.82.112004].

Diffractive W and Z production at the Fermilab Tevatron

CIOCCI, MARIA AGNESE;
2010-01-01

Abstract

We report on a measurement of the fraction of events with a W or Z boson which are produced diffractively in (p) over bar p collisions at root s = 1.96 TeV, using data from 0.6 fb(-1) of integrated luminosity collected with the CDF II detector equipped with a Roman-pot spectrometer that detects the (p) over bar from (p) over bar + p -> (p) over bar + [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 xi of 0.03 < xi < 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, (p) over bar + 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) over bar + p -> [X + W/Z] + p, and on exclusive Z production, (p) over bar + p -> (p) over bar + Z + p. No signal is seen above background for these processes, and comparisons are made with expectations.
2010
T., A., B. A., G., S., A., D., A., A., A., A., A., et al. (2010). Diffractive W and Z production at the Fermilab Tevatron. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 82(11), 112004-1-112004-10 [10.1103/PhysRevD.82.112004].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/35533
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