Using 1.45 million hadronic Z decays collected by the ALEPH experiment at LEP, the b -> tau(-) nubar_tau X branching ratio is measured to be 2.75 +/- 0.30 +/- 0.37%. In addition an upper limit of 1.8 x 10(-3) at 90% confidence level is placed upon the exclusive branching ratio of B- -> tau(-) nubar_tau. These measurements are consistent with SM expectations, and put the constraint tan(beta/M(h+/-)) < 0.52 GeV(-1) at 90% confidence level on all Type II two Higgs doublet models (such as the MSSM).

D., B., D., C., I., D., D., D., P., G., C., G., et al. (1995). Measurement of the b->tau- nubar_(tau) Branching Ratio and An Upper Limit On B- ->tau- nubar_tau. PHYSICS LETTERS. SECTION B, 343(1-4), 444-452 [10.1016/0370-2693(94)01584-Y].

Measurement of the b->tau- nubar_(tau) Branching Ratio and An Upper Limit On B- ->tau- nubar_tau

BOTTIGLI, UBALDO;CIOCCI, MARIA AGNESE;MARROCCHESI, PIER SIMONE;
1995-01-01

Abstract

Using 1.45 million hadronic Z decays collected by the ALEPH experiment at LEP, the b -> tau(-) nubar_tau X branching ratio is measured to be 2.75 +/- 0.30 +/- 0.37%. In addition an upper limit of 1.8 x 10(-3) at 90% confidence level is placed upon the exclusive branching ratio of B- -> tau(-) nubar_tau. These measurements are consistent with SM expectations, and put the constraint tan(beta/M(h+/-)) < 0.52 GeV(-1) at 90% confidence level on all Type II two Higgs doublet models (such as the MSSM).
1995
D., B., D., C., I., D., D., D., P., G., C., G., et al. (1995). Measurement of the b->tau- nubar_(tau) Branching Ratio and An Upper Limit On B- ->tau- nubar_tau. PHYSICS LETTERS. SECTION B, 343(1-4), 444-452 [10.1016/0370-2693(94)01584-Y].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/37913
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