Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-10-04
Phys.Rev.D74:115006,2006
Physics
High Energy Physics
High Energy Physics - Phenomenology
RevTeX, 23 pages, 9 figures. High resolution figures available upon request
Scientific paper
10.1103/PhysRevD.74.115006
We study the branching fractions and the lepton polarization asymmetries of rare $B \to X_s \tau^+ \tau^-$ and $B \to K^{(*)} \tau^+ \tau^-$ modes within the Standard Model and in the Appelquist-Cheng-Dobrescu model, which is a New Physics scenario with a single universal extra dimension. In particular, we investigate the sensitivity of the observables to the radius $R$ of the compactified extra-dimension, which is the only new parameter in this New Physics model. For the exclusive transitions we study the uncertainties due to the hadronic matrix elements using two set of form factors, finding that in many cases such uncertainties are small. In particular, we show that the $\tau^-$ polarization asymmetries become free of hadronic uncertainties if Large Energy relations for the form factors, valid for low momentum transfer to the lepton pair, are used. We also consider $K^*$ helicity fractions and their sensitivity to the compactification parameter.
Colangelo Pietro
Fazio Fulvia de
Ferrandes Rossella
Pham Tri Nang
No associations
LandOfFree
Spin effects in rare $B \to X_s τ^+ τ^-$ and $B \to K^{(*)} τ^+ τ^-$ decays in a single Universal Extra Dimension scenario 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 Spin effects in rare $B \to X_s τ^+ τ^-$ and $B \to K^{(*)} τ^+ τ^-$ decays in a single Universal Extra Dimension scenario, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin effects in rare $B \to X_s τ^+ τ^-$ and $B \to K^{(*)} τ^+ τ^-$ decays in a single Universal Extra Dimension scenario will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-155816