We report on a measurement of the fraction of events with a W or Z boson produced diffractively in p anti-p collisions at s**(1/2) 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-bar from p-bar + p --> p-bar + [X + W/Z]. We find that (0.97 +/- 0.11)% of Ws and (0.85 +/- 0.22)% of Zs are produced diffractively in a region of (anti)proton fractional momentum loss xi of 0.03 < xi &lt; 0.10 and 4-momentum transferred squared t of -1 < t &lt; 0 (GeV/c)2. We also report on searches for W and Z production in double Pomeron exchange, p + p-bar --> p+[X + W/Z] + p-bar, and on exclusive Z production, p-bar + p --> p-bar + Z + p. No signal is seen above background for these processes, and comparisons are made with expectations.

T. AALTONEN, B.ALVAREZ GONZALEZV, S. AMERIO, D. AMIDEI, A. ANASTASSOV, A. ANNOVI, et al. (2010). Diffractive W and Z Production at the Fermilab Tevatron. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 82, 112004-1-112004-10 [10.1103/PhysRevD.82.112004].

Diffractive W and Z Production at the Fermilab Tevatron

CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MARGAROLI, FABRIZIO;MAZZANTI, PAOLO;MOGGI, NICCOLO';MUSSINI, MANUEL;RIMONDI, FRANCO;ZUCCHELLI, STEFANO
2010

Abstract

We report on a measurement of the fraction of events with a W or Z boson produced diffractively in p anti-p collisions at s**(1/2) 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-bar from p-bar + p --> p-bar + [X + W/Z]. We find that (0.97 +/- 0.11)% of Ws and (0.85 +/- 0.22)% of Zs are produced diffractively in a region of (anti)proton fractional momentum loss xi of 0.03 < xi < 0.10 and 4-momentum transferred squared t of -1 < t < 0 (GeV/c)2. We also report on searches for W and Z production in double Pomeron exchange, p + p-bar --> p+[X + W/Z] + p-bar, and on exclusive Z production, p-bar + p --> p-bar + Z + p. No signal is seen above background for these processes, and comparisons are made with expectations.
2010
T. AALTONEN, B.ALVAREZ GONZALEZV, S. AMERIO, D. AMIDEI, A. ANASTASSOV, A. ANNOVI, et al. (2010). Diffractive W and Z Production at the Fermilab Tevatron. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 82, 112004-1-112004-10 [10.1103/PhysRevD.82.112004].
T. AALTONEN; B.ALVAREZ GONZALEZV; S. AMERIO; D. AMIDEI; A. ANASTASSOV; A. ANNOVI; J. ANTOS; G. APOLLINARI; J.A. APPEL; A. APRESYAN; T. ARISAWA; A. AR...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/98004
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