First Measurement of the Branching Fraction of the Decay psi(2S) --> tau tau

Details First Measurement of the Branching Fraction of the Decay psi(2S) --> tau tau First Measurement of the Branching Fraction of the Decay psi(2S) --> tau tau

2000-10-28

arxiv.org/abs/hep-ex/0010072v1

Phys.Rev.D65:052004,2002

Physics

High Energy Physics

High Energy Physics - Experiment

9 pages, 2 figures

Scientific paper

10.1103/PhysRevD.65.052004

The branching fraction of the psi(2S) decay into tau pair has been measured for the first time using the BES detector at the Beijing Electron-Positron Collider. The result is $B_{\tau\tau}=(2.71\pm 0.43 \pm 0.55) \times 10^{-3}$, where the first error is statistical and the second is systematic. This value, along with those for the branching fractions into e+e- and mu+mu of this resonance, satisfy well the relation predicted by the sequential lepton hypothesis. Combining all these values with the leptonic width of the resonance the total width of the psi(2S) is determined to be $(252 \pm 37)$ keV.

Affiliated with

Also associated with

No associations

Rating

First Measurement of the Branching Fraction of the Decay psi(2S) --> tau tau 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 First Measurement of the Branching Fraction of the Decay psi(2S) --> tau tau, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and First Measurement of the Branching Fraction of the Decay psi(2S) --> tau tau will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-199733