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Trojan Penguins and Isospin Violation in Hadronic B Decays
Yuval Grossman, Alexander L. Kagan, Matthias Neubert
Some rare hadronic decays of B mesons, such as B->pi K, are sensitive to isospin-violating contributions from physics beyond the Standard Model. Although commonly referred to as el…
Determination of the weak phase gamma=arg(V_ub^*)
Matthias Neubert
Various strategies for extracting or constraining the weak phase gamma with controlled theoretical uncertainties are reviewed. Measurements of the rates for the hadronic decays B^+…
Model-independent information on gamma from B^+- -> pi K Decays
Matthias Neubert
Measurements of the rates for the hadronic decays B^+- -> pi K can be used to derive information on the weak phase gamma=arg(V_ub^*) in a largely model-independent way. Hadronic un…
Large Delta(I)=3/2 Contribution to epsilon'/epsilon in Supersymmetry
Alexander L. Kagan, Matthias Neubert
We show that in supersymmetric extensions of the Standard Model gluino box diagrams can yield a large Delta(I)=3/2 contribution to s->d+q(bar)+q FCNC processes, which may induce a…
QCD Factorization for Decays: Strong Phases and CP Violation in the Heavy Quark Limit
M. Beneke, G. Buchalla, M. Neubert +1
We show that, in the heavy quark limit, the hadronic matrix elements that enter meson decays into two light mesons can be computed from first principles, including `non-factori…
Exploring the Weak Phase gamma in B^+- -> pi K Decays
Matthias Neubert
Measurements of the rates for the hadronic decays B^+- -> pi K along with the CP-averaged B^+- -> pi^+- pi^0 branching ratio can be used to bound and extract the weak phase gamma=-…
Borel summation and momentum-plane analyticity in perturbative QCD
Irinel Caprini, Matthias Neubert
We derive a compact expression for the Borel sum of a QCD amplitude in terms of the inverse Mellin transform of the corresponding Borel function. The result allows us to investigat…