Measurement of the Muonic Branching Fractions of the Narrow Upsilon Resonances

Details Measurement of the Muonic Branching Fractions of the Narrow Upsilon Resonances Measurement of the Muonic Branching Fractions of the Narrow Upsilon Resonances

2004-09-08

arxiv.org/abs/hep-ex/0409027v2

Phys.Rev.Lett.94:012001,2005

Physics

High Energy Physics

High Energy Physics - Experiment

9 pages postscript,also available through http://www.lns.cornell.edu/public/CLNS/2004/, submitted to PRL

Scientific paper

10.1103/PhysRevLett.94.012001

The decay branching fractions of the three narrow Upsilon resonances to mu+ mu- have been measured by analyzing about 4.3 1/fb e+e- data collected with the CLEO III detector. The branching fraction B(Y(1S) -> mu+ mu-) = (2.49 +- 0.02 +- 0.07)% is consistent with the current world average but B(Y(2S) -> mu+ mu-) = (2.03 +- 0.03 +- 0.08)% and B(Y(3S) -> mu+ mu-) = (2.39 +- 0.07 +- 0.10)% are significantly larger than prior results. These new muonic branching fractions imply a narrower total decay width for the Y(2S) and Y(3S) resonances and lower other branching fractions that rely on these decays in their determination.

Affiliated with

Also associated with

No associations

Rating

Measurement of the Muonic Branching Fractions of the Narrow Upsilon Resonances 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 Measurement of the Muonic Branching Fractions of the Narrow Upsilon Resonances, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of the Muonic Branching Fractions of the Narrow Upsilon Resonances will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-343874