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New Aspects of B -> pi pi, pi K and their Implications for Rare Decays
Andrzej J. Buras, Robert Fleischer, Stefan Recksiegel +1
We analyse the B -> pi pi, pi K modes in the light of the most recent B-factory data, and obtain the following new results: (i) the B0 -> pi+ pi-, pi- K+ modes prefer gamma=(74+-6)…
Electroweak Penguin Hunting Through B -> pi pi, pi K and Rare K and B Decays
Andrzej J. Buras, Robert Fleischer, Stefan Recksiegel +1
The decays with significant electroweak penguin contributions show a puzzling pattern. We explore this " puzzle" through a systematic strategy. The starting point,…
Photon Structure Functions: 1978 AND 2005
Andrzej J. Buras
I describe the early days of the photon structure functions. In particular I discuss the parton model result of Walsh and Zerwas (1973), leading order QCD calculation of Witten (19…
The Rare Decay K^+ -> pi^+ nu nubar at the Next-to-Next-to-Leading Order in QCD
A. J. Buras, M. Gorbahn, U. Haisch +1
We calculate the charm quark contribution to the rare decay K+ -> pi+ nu anti-nu in the next-to-next-to-leading order of QCD. This new contribution reduces the theoretical uncertai…
Flavour Physics and CP Violation
Andrzej J. Buras
After listing basic properties of the Standard Model (SM) that play the crucial role in the field of flavour and CP violation, we discuss the following topics: 1) CKM matrix and th…
KL -> pi0 nu nu-bar as a Probe of New Physics
Douglas Bryman, Andrzej J. Buras, Gino Isidori +1
We summarize the theoretical virtues of the rare K -> pi nu nu-bar decays and emphasize the unique role of KL -> pi0 nu nu-bar in probing the nature of physics beyond the Standard…
Upper Bounds on Rare K and B Decays from Minimal Flavour Violation
Christoph Bobeth, Marcella Bona, Andrzej J. Buras +4
We study the branching ratios of rare K and B decays in models with minimal flavour violation, using the presently available information from the universal unitarity triangle analy…
Non-Decoupling Effects of the Heavy T in the B^0_{d,s}-\bar B^0_{d,s} Mixing and Rare K and B Decays
Andrzej J. Buras, Anton Poschenrieder, Selma Uhlig
We point out that in the case of a heavy top quark T, present in the Littlest Higgs model (LH), and the t-T mixing parameter x_L > 0.90 the contribution to B^0_{d,s}-\bar B^0_{d,s}…