TY - JOUR
T1 - The inclusive B → τνX decay in two Higgs doublet models
AU - Grossman, Yuval
AU - Ligeti, Zoltan
PY - 1994/7/21
Y1 - 1994/7/21
N2 - We calculate in the framework of two Higgs doublet models the differential decay rate for inclusive B → τνX transitions to order 1 mb2 in the heavy quark expansion, for both polarized and unpolarized tau leptons. In contrast to the situation in the standard model, we find sizeable 1 mb2 corrections. A systematic heavy quark expansion significantly reduces the theoretical uncertainties in the calculation compared to the existing free quark decay model results. From the experimental measurement of the branching ratio, we derive the bound tan β < 0.51mH±[GeV]. We point out that the tau polarization is potentially a more sensitive probe of multi scalar models than the branching ratio itself.
AB - We calculate in the framework of two Higgs doublet models the differential decay rate for inclusive B → τνX transitions to order 1 mb2 in the heavy quark expansion, for both polarized and unpolarized tau leptons. In contrast to the situation in the standard model, we find sizeable 1 mb2 corrections. A systematic heavy quark expansion significantly reduces the theoretical uncertainties in the calculation compared to the existing free quark decay model results. From the experimental measurement of the branching ratio, we derive the bound tan β < 0.51mH±[GeV]. We point out that the tau polarization is potentially a more sensitive probe of multi scalar models than the branching ratio itself.
UR - http://www.scopus.com/inward/record.url?scp=0000275932&partnerID=8YFLogxK
U2 - 10.1016/0370-2693(94)91267-X
DO - 10.1016/0370-2693(94)91267-X
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:0000275932
SN - 0370-2693
VL - 332
SP - 373
EP - 380
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 3-4
ER -