Title

Experimental investigation of the two-photon widths of the Xc0 and the Xc2 mesons

Document Type

Article

Publication Date

8-6-2001

Abstract

The quantum chromodynamics (QCD) of charmonium system was studied by analyzing two-photon production of C-even charmonium states. Two-photon crossection was measured to determine the two-photon width. Perturbative QCD (PQCD) calculated two-gluon width with reduced uncertainities due to cancellation of charmed quark mass factors, nonperturbative factors and wave function dependence. The cross sections were calculated by dividing the fitted event yield with detection efficiency, integrated luminosity and branching function. The analysis suggested that PQCD calculations accurately predicted the ratios of decay rates.

Publication Name

Physical Review Letters

Volume Number

87

First Page

618011

Last Page

618015

Issue Number

6

Article

061801

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