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Using Bs(t) -> phi K_s to measure Sin 2 beta
Alakabha Datta, C. S. Kim, David London
In this talk we show that, unlike other pure penguin processes, the decay $\bs(t)\toϕ\ks$ is dominated by a single amplitude, that of the internal -quark. Thus, the ind…
Flavour-Changing Neutral Currents and Leptophobic Z' Gauge Bosons
Karine Leroux, David London
Leptophobic Z' gauge bosons can appear in models with an E_6 gauge symmetry. We show that flavour-changing neutral currents can be generated in some of these models due to the mixi…
Improving Bounds on Penguin Pollution in B -> pi pi
Michael Gronau, David London, Nita Sinha +1
In the presence of penguin contributions, the indirect CP asymmetry in B0(t) -> pi+ pi- measures sin(2α+ 2θ), where 2θparametrizes the size of the penguin ``pollution.'' We derive…
B -> K(*) Kbar(*) Decays: A New Method for Measuring the CP Phase α
Alakabha Datta, David London
We present a new method for measuring the CP phase α. It requires the measurement of the pure penguin decays Bd(t) -> K(*) Kbar(*) and B_s -> K(*) Kbar(*). The method is quite clea…
Difficulties in Obtaining Weak Phases from Penguin Decays
Alakabha Datta, C. S. Kim, David London
We re-examine a recent proposal for obtaining βusing the measurements of the b -> d penguin decays B_d(t) -> K^0 \kbar and B_s(t) -> ϕK_S, along with a theoretical assumption. We s…