Measurement of σχc2B(χc2→J/ψγ)/ σχc1B(χc1→J/ψγ) in pp? Collisions at s=1.96TeV
Journal
Physical Review Letters
Journal Volume
98
Journal Issue
23
Date Issued
2007
Author(s)
Abulencia, A. et al. (CDF Collaboration)
Abstract
We measure the ratio of cross section times branching fraction, Rp=sigma chi c2 B(chi c2-->J/psi gamma)/sigma chi c1 B(chi c1-->J/psi gamma), in 1.1 fb(-1) of pp collisions at square root s=1.96 TeV. This measurement covers the kinematic range pT(J/psi)>4.0 GeV/c, |eta(J/psi)1.0 GeV/c. For events due to prompt processes, we find Rp=0.395+/-0.016(stat)+/-0.015(syst). This result represents a significant improvement in precision over previous measurements of prompt chi c1,2 hadro production.
Type
journal article