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Measurement of the J/ψ meson and b-hadron production cross sections in pp collisions at s√=1960  GeV

CollaborationWith : Campanelli, Mario / Clark, Allan Geoffrey / Donega, Mauro / D'Onofrio, Monica / Lister, Alison / Liu, Yanwen / Wu, Xin / Zsenei, Andras
Published in Physical Review. D. 2005, vol. 71, no. 03, p. 032001
Abstract We present a new measurement of the inclusive and differential production cross sections of J/ψ mesons and b hadrons in proton-antiproton collisions at s√=1960  GeV. The data correspond to an integrated luminosity of 39.7  pb−1 collected by the CDF run II detector. We find the integrated cross section for inclusive J/ψ production for all transverse momenta from 0 to 20  GeV/c in the rapidity range |y|<0.6 to be 4.08±0.02(stat)+0.36−0.33(syst)  μb. We separate the fraction of J/ψ events from the decay of the long-lived b hadrons using the lifetime distribution in all events with pT(J/ψ)>1.25  GeV/c. We find the total cross section for b hadrons, including both hadrons and antihadrons, decaying to J/ψ with transverse momenta greater than 1.25  GeV/c in the rapidity range |y(J/ψ)|<0.6 is 0.330±0.005(stat)+0.036−0.033(syst)  μb. Using a Monte Carlo simulation of the decay kinematics of b hadrons to all final states containing a J/ψ, we extract the first measurement of the total single b-hadron cross section down to zero transverse momentum at s√=1960  GeV. We find the total single b-hadron cross section integrated over all transverse momenta for b hadrons in the rapidity range |y|<0.6 to be 17.6±0.4(stat)+2.5−2.3(syst)  μb.
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CDF COLLABORATION. Measurement of the J/ψ meson and b-hadron production cross sections in pp collisions at s√=1960  GeV. In: Physical Review. D, 2005, vol. 71, n° 03, p. 032001. https://archive-ouverte.unige.ch/unige:38285

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Deposited on : 2014-06-30

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