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.
Observation of diffractive b-quark production at the Fermilab, Tevatron RID C-1693-2008 RID A-5169-2010 RID C-2406-2008
DELL'ORSO, MAURO;DONATI, SIMONE;PUNZI, GIOVANNI;
2000-01-01
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.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
