We report a measurement of the fraction of b quarks produced diffractively in (p) over bar p collisions at root s = 1.8 TeV. Diffraction is identified by the absence of particles in a forward pseudorapidity region. From events with an electron of transverse momentum 9.5 < p(T)(e) < 20 GeV/c within the pseudorapidity region \eta\ < 1.1, the ratio of diffractive to total b-quark production rates is found to be R-(b) over bar b = [0.62 +/- 0.19(stat) +/- 0.16(syst)]%. This result is comparable in magnitude to corresponding ratios for W and dijet production but significantly lower than expectations based on factorization. RI Lancaster, Mark/C-1693-2008; Vucinic, Dejan/C-2406-2008; Nomerotski, Andrei/A-5169-2010; Prokoshin, Fedor/E-2795-2012; Chiarelli, Giorgio/E-8953-2012; Azzi, Patrizia/H-5404-2012

Observation of diffractive b-quark production at the Fermilab, Tevatron

PIACENTINO, Giovanni Maria;
2000

Abstract

We report a measurement of the fraction of b quarks produced diffractively in (p) over bar p collisions at root s = 1.8 TeV. Diffraction is identified by the absence of particles in a forward pseudorapidity region. From events with an electron of transverse momentum 9.5 < p(T)(e) < 20 GeV/c within the pseudorapidity region \eta\ < 1.1, the ratio of diffractive to total b-quark production rates is found to be R-(b) over bar b = [0.62 +/- 0.19(stat) +/- 0.16(syst)]%. This result is comparable in magnitude to corresponding ratios for W and dijet production but significantly lower than expectations based on factorization. RI Lancaster, Mark/C-1693-2008; Vucinic, Dejan/C-2406-2008; Nomerotski, Andrei/A-5169-2010; Prokoshin, Fedor/E-2795-2012; Chiarelli, Giorgio/E-8953-2012; Azzi, Patrizia/H-5404-2012
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11695/4809
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