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26 April 2024

» pubmed » pmid11015879

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Observation of diffractive b-quark production at the fermilab tevatron
F Ukegawa ; J Valls ; S Vejcik ; G Velev ; R Vidal ; R Vilar ; I Vologouev ; D Vucinic ; R G Wagner ; R L Wagner ; J Wahl ; N B Wallace ; A M Walsh ; C Wang ; C H Wang ; M J Wang ; T Watanabe ; T Watts ; R Webb ; H Wenzel ; W C Wester ; A B Wicklund ; E Wicklund ; H H Williams ; P Wilson ; B L Winer ;
Date:	10 Jan 2000
Journal:	Phys Rev Lett, 84 (2), 232-7
Abstract:	We report a measurement of the fraction of b quarks produced diffractively in &pmacr;p collisions at sqrt[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(e)(T)<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(&bmacr;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.
Source:	PubMed, pmid11015879
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