E-viri
PDF
Recenzirano
Odprti dostop
-
Ukegawa, F; Valls, J; Vejcik, 3rd, S; Velev, G; Vidal, R; Vilar, R; Vologouev, I, I; Vucinic, D; Wagner, RG; Wagner, RL; Wahl, J; Wallace, NB; Walsh, AM; Wang, C; Wang, CH; Wang, MJ; Watanabe, T; Watts, T; Webb, R; Wenzel, H; Wester, 3rd, WC; Wicklund, AB; Wicklund, E; Williams, HH; Wilson, P; Winer, BL
Physical review letters, 01/2000, Letnik: 84, Številka: 2Journal Article
We report a measurement of the fraction of b quarks produced diffractively in p collisions at sqrts = 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( 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.
