APS » PROLA » Phys. Rev. D » Volume 71 » Issue 3
< Previous article | Next article >

Phys. Rev. D 71, 032001 (2005) [26 pages]

Measurement of the J/ψ meson and b-hadron production cross sections in pp̅ collisions at sqrt[s]=1960  GeV

Download: PDF (1021 kB) or Buy this Article (Use Article Pack) Export: BibTeX or EndNote (RIS)

D. Acosta et al. CDF Collaboration
Show All Authors/Affiliations

Received 23 December 2004; published 3 February 2005

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 sqrt[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)-0.33+0.36(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)-0.033+0.036(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 sqrt[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)-2.3+2.5(syst)  μb.


©2005 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevD.71.032001
DOI: 10.1103/PhysRevD.71.032001
PACS: 13.85.Qk, 12.38.Qk, 13.20.Gd, 14.40.Gx

[ Abstract  |  Previous article  |  Next article  |  Issue 3 ]