Determination of the J/psi Leptonic Branching Fraction via psi(2S) -> pi^+ pi^- J/psi

Details Determination of the J/psi Leptonic Branching Fraction via psi(2S) -> pi^+ pi^- J/psi Determination of the J/psi Leptonic Branching Fraction via psi(2S) -> pi^+ pi^- J/psi

1998-06-10

arxiv.org/abs/hep-ex/9806012v1

Phys.Rev.D58:092006,1998

Physics

High Energy Physics

High Energy Physics - Experiment

Eleven pages with three figures

Scientific paper

10.1103/PhysRevD.58.092006

A comparison of the rates for psi(2S) -> pi^+ pi^- J/psi, J/psi -> l^+l^- and J/psi -> anything is used to determine the J/psi leptonic branching fractions. The results are B(J/psi -> e^+e^-) = (5.90 +/- 0.05 +/- 0.10)% and B(J/psi -> mu^+ mu^-) = (5.84 +/- 0.06 +/- 0.10)%, where the first error is statistical and the second is systematic. Assuming lepton universality, the leptonic branching fraction of the J/psi is B(J/psi -> l^+ l^-) = (5.87 +/- 0.04 +/- 0.09)% per species. This result is used to estimate the QCD scale factor Lambda_MSbar and the strong coupling constant alpha_s.

Affiliated with

Also associated with

No associations

Rating

Determination of the J/psi Leptonic Branching Fraction via psi(2S) -> pi^+ pi^- J/psi does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Determination of the J/psi Leptonic Branching Fraction via psi(2S) -> pi^+ pi^- J/psi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determination of the J/psi Leptonic Branching Fraction via psi(2S) -> pi^+ pi^- J/psi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-611565