Measurement of the J/ψ meson and b-hadron production cross sections in pp¯ collisions at √(s)=1960 GeV
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.
- Publication:
-
Physical Review D
- Pub Date:
- February 2005
- DOI:
- 10.1103/PhysRevD.71.032001
- arXiv:
- arXiv:hep-ex/0412071
- Bibcode:
- 2005PhRvD..71c2001A
- Keywords:
-
- 13.85.Qk;
- 12.38.Qk;
- 13.20.Gd;
- 14.40.Gx;
- Inclusive production with identified leptons photons or other nonhadronic particles;
- Experimental tests;
- Decays of J/psi Upsilon and other quarkonia;
- Mesons with S=C=B=0 mass>2.5 GeV;
- High Energy Physics - Experiment
- E-Print:
- Phys.Rev.D71:032001,2005