Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-10-18
Eur.Phys.J.C44:435-446,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
25 pgs. Figures and their descriptions improved, references added
Scientific paper
10.1140/epjc/s2005-02370-2
The one-loop contributions to the branching ratios for leptonic tau decays are calculated in the CP conserving 2HDM(II). We found that these one-loop contributions, involving both neutral and charged Higgs bosons, dominate over the tree-level H^+ exchange, the latter one being totally negligible for the decay into electron. The analysis is focused on large tanbeta enhanced contributions to the considered branching ratios. We derive a simple analytical expression for the one-loop contribution which holds in this case. We show that the leptonic branching ratios of tau are complementary to the Higgsstrahlung processes for h(H) and have a large potential on constraining parameters of the model. In this work we provide upper limits on Yukawa couplings for both light h and light A scenarios and we derive new lower limit on mass of M_{H^+} as a function of tanbeta, which differs significantly from what was considered as standard constraint based on the tree-level H^{+} exchange only. Interestingly we obtain also an upper limit on M_{H^+}. For a SM-like h scenario, with heavy and degenerate additional Higgs bosons, one-loop corrections disappear.
Krawczyk Maria
Temes David
No associations
LandOfFree
Large 2HDM(II) one-loop corrections in leptonic tau decays does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Large 2HDM(II) one-loop corrections in leptonic tau decays, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Large 2HDM(II) one-loop corrections in leptonic tau decays will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-399009