Using 1.45 million hadronic Z decays collected by the ALEPH experiment at LEP, the b --> tau(-) ($) over bar V(tau)X branching ratio is measured to be 2.75 +/- 0.30 +/- 0.37%. In addition an upper limit of 1.8 x 10(-3) at 90% confidence level is placed upon the exclusive branching ratio of B- --> tau(-)($) over bar V-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).
Titolo: | MEASUREMENT OF THE B-]TAU(-)(NU)OVER-BAR-(TAU)X BRANCHING RATIO AND AN UPPER LIMIT ON B--]TAU(-)(NU)OVER-BAR-(TAU) | |
Autori: | ||
Data di pubblicazione: | 1995 | |
Rivista: | ||
Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/0370-2693(94)01584-Y | |
Handle: | http://hdl.handle.net/11384/4410 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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