Kavli Affiliate: D. B. Macfarlane | First 5 Authors: J. P. Lees, V. Poireau, V. Tisserand, E. Grauges, A. Palano | Summary: We report on a precision measurement of the ratio ${cal R}_{taumu}^{Upsilon(3S)} = {cal B}(Upsilon(3S)totau^+tau^-)/{cal B}(Upsilon(3S)tomu^+mu^-)$ using data collected with the BaBar detector at the SLAC PEP-II $e^+e^-$ collider. The measurement is based on […]
Continue.. Precision measurement of the ${cal B}(Υ(3S)toτ^+τ^-)/{cal B}(Υ(3S)toμ^+μ^-)$ ratio