Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-12-21
Phys.Rev.D66:034002,2002
Physics
High Energy Physics
High Energy Physics - Phenomenology
33 pages, 13 figures (requires epsfig); references updated, typos fixed, small changes in the numerics; to appear in Phys. Rev
Scientific paper
10.1103/PhysRevD.66.034002
We update the branching ratios for the inclusive decays $B\to X_s \ell^+ \ell^-$ and the exclusive decays $B\to (K,K^*) \ell^+ \ell^-$, with $\ell=e, \m$, in the standard model by including the explicit $O(\a_s)$ and $\Lambda_{\hbox{\tiny QCD}} / m_b$ corrections. This framework is used in conjunction with the current measurements of the branching ratios for $B\to X_s \g$ and $B\to K \ell^+ \ell^-$ decays and upper limits on the branching ratios for the decays $B\to (K^*,X_s) \ell^+ \ell^-$ to work out bounds on the Wilson coefficients $C_7$, $C_8$, $C_9$ and $C_{10}$ appearing in the effective Hamiltonian formalism. The resulting bounds are found to be consistent with the predictions of the standard model and some variants of supersymmetric theories. We illustrate the constraints on supersymmetric parameters that the current data on rare B decays implies in the context of minimal flavor violating model and in more general scenarios admitting additional flavor changing mechanisms. Precise measurements of the dilepton invariant mass distributions in the decays $B \to (X_s,K^*,K) \ell^+ \ell^-$, in particular in the lower dilepton mass region, and the forward-backward asymmetry in the decays $B \to (X_s,K^*) \ell^+ \ell^-$, will greatly help in discriminating among the SM and various supersymmetric theories.
Ali Abbas
Greub Christoph
Hiller Gerald
Lunghi Enrico
No associations
LandOfFree
Improved Model-Independent Analysis of Semileptonic and Radiative Rare B 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 Improved Model-Independent Analysis of Semileptonic and Radiative Rare B Decays, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Improved Model-Independent Analysis of Semileptonic and Radiative Rare B Decays will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-175418