The measurement of B±→τ±ντ at the B factories provides important constraints on the parameter tan β/mH± in the context of models with two Higgs doublets. Limits on this decay from e+e- collisions at the Z peak were sensitive to the sum of B±→τ ±ντ and Bc±→τ±ντ. Because of the possibly sizeable contribution from Bc±→τ±ντ we suggest that a signal for this combination might be observed if the CERN LEP L3 Collaboration used its total data of ∼3.6×106 hadronic decays of the Z boson. Moreover, we point out that a future linear collider operating at the Z peak (Giga Z option) could constrain tan β/mH± from the sum of these processes with a precision comparable to that anticipated at proposed high luminosity B factories from B±→τ±ντ alone.
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|Publication status||Published - 2008 Jun 23|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)