Published in:
Physical Review D 73,5 (2006) 051103;
Link to original published article:
http://dx.doi.org/10.1103/PhysRevD.73.051103
Abstract
Using data acquired with the CLEO detector at the CESR e(+)e(-) collider at root s=3.773 GeV, we measure the cross section for the radiative return process e(+)e(-)->gamma J/psi, J/psi ->mu(+)mu(-), resulting in B(J/psi ->mu(+)mu(-))x Gamma(ee)(J/psi)=0.3384 +/- 0.0058 +/- 0.0071 keV, Gamma(ee)(J/psi)=5.68 +/- 0.11 +/- 0.13 keV, and Gamma(tot)(J/psi)=95.5 +/- 2.4 +/- 2.4 keV, in which the errors are statistical and systematic, respectively. We also determine the ratio Gamma(ee)[psi(2S)]/Gamma(ee)(J/psi)=0.45 +/- 0.01 +/- 0.02.
Keywords
qed radiative-corrections;; hard-photon-emission;; cleo-ii detector;; pair
Date of this Version
January 2006
COinS