12 papers
Probing New Physics Via the Transverse Amplitudes of B0-> K*0(-> K- pi+) l+l- at Large Recoil
Frank Krüger, Joaquim Matias
We perform an analysis of the K* polarization states in the exclusive B meson decay B0->K*0(-> K- pi+)l+ l- (l=e, mu, tau) in the low dilepton mass region, where the final vector m…
Gauge invariance and form factors for the decay B --> gamma l^+l^-
Frank Krüger, Dmitri Melikhov
We analyse the form factors for the B --> gamma l^+l^- weak transition. We show that making use of the gauge invariance of the B --> gamma l^+l^- amplitude, the structure of the fo…
QCD Corrections to B -> X_{d,s} nu nubar, B_{d,s} -> l^+l^-, K -> pi nu nubar and K_L -> mu^+ mu^- in the MSSM
C. Bobeth, A. J. Buras, F. Krüger +1
We compute for the first time QCD corrections to the rare decays B -> X_{d,s} nu nubar, B_{d,s} -> l^+ l^-, K -> pi nu nubar and K_L -> mu^+ mu^-, where l=e or mu, in the context o…
Analysis of Neutral Higgs-Boson Contributions to the Decays B_s -> l^+l^- and B -> K l^+l^-
C. Bobeth, T. Ewerth, F. Krüger +1
We report on a calculation of Higgs-boson contributions to the decays B_s -> l^+l^- and B -> K l^+l^- (l=e, mu) which are governed by the effective Hamiltonian describing b -> s l^…
Spontaneous CP Violation in the Next-to-Minimal Supersymmetric Standard Model Revisited
G. C. Branco, F. Krüger, J. C. Romão +1
We re-examine spontaneous CP violation at the tree level in the context of the next-to-minimal supersymmetric standard model (NMSSM) with two Higgs doublets and a gauge singlet fie…
Looking for Novel CP-Violating Effects in B->K^*l^+l^-
F. Krüger, E. Lunghi
The CP-violating asymmetries in the exclusive decay B->K^*l^+l^- (l=e,mu,tau) are predicted to be exceedingly small in the standard model (SM), thereby offering an opportunity to a…