We perform a finite energy sum rule analysis of the flavor ud two-point VA current correlator, ∆Π(Q2). The analysis, which is performed using both the ALEPH and OPAL databases for the V-A spectral function, ∆ρ, allows us to extract the dimension six V-A OPE coefficient, a6, which is related to the matrix element of the electroweak penguin operator, Q8, by chiral symmetry. The result for a6 lead...

We calculate the 10 × 10 two–loop anomalous dimension matrix to order O(ααs) in the dimensional regularization scheme with anticommuting γ5 (NDR) which is necessary for the extension of the ∆S = 1 weak Hamiltonian involving electroweak penguins beyond the leading logarithmic approximation. We demonstrate, how a direct calculation of penguin diagrams involving γ5 in closed fermion loops can be a...

We perform a next-to-next-to-leading order (NNLO) QCD analysis of the charmtop-quark contribution ηct to the effective |∆S| = 2 Hamiltonian in the Standard Model. ηct represents an important part of the short distance contribution to the parameter ǫK . We calculate the three-loop anomalous dimension of the leading operator Q̃S2, the three-loop mixing of the current-current and penguin operators ...

New limits on the Higgs mass from LEP and new calculations on the radiative (penguin) decay of the b-quark into sγ restrict the parameter space of the Constrained Minimal Supersymmetric Standard Model (CMSSM). We find that for the low tan β scenario only one sign of the Higgs mixing parameter is allowed, while the high tan β scenario is practically excluded, if one requires all sparticles to be...

We calculate ∆I = 3/2 kaon decay matrix elements using domain wall fermions and the DBW2 gauge action at one coarse lattice spacing corresponding to a−1 = 1.3 GeV. We employ the Lellouch and Lüscher formula and its extention for non-zero total momentum to extract the infinite volume, center-of-mass frame decay amplitudes. The decay amplitudes obtained from the methods correspond to those from t...

Major new experimental efforts on detecting CP violation in B decays will very soon go on the air. Recent developments suggest that final state interaction phases in exclusive decays of B are unlikely to be small indicating the possibility of observable direct CP asymmetries in these channels. CLEO results on charmless hadronic modes suggest penguin amplitudes are rather big implying that the e...

I discuss the role of the ∆I = 1/2 selection rule in K → ππ decays for the theoretical calculations of ε/ε . Lacking reliable “first principle” calculations, phenomenological approaches may help in understanding correlations among different contributions and available experimental data. In particular, in the chiral quark model approach the same dynamics which underlies the ∆I = 1/2 selection ru...

The phenomenon of CP violation in the B system and strategies for extracting CKM phases are reviewed. We focus both on general aspects and on some recent developments including CP-violating asymmetries in Bd decays, the Bs system in light of a possible width difference ∆Γs, charged B decays, and SU(3) relations among certain transition amplitudes. In order to describe the relevant non-leptonic ...

Antarctica is considered a relatively uncontaminated region with regard to the infectious diseases because of its extreme environment, and isolated geography. For the genetic characterization and molecular epidemiology of the newly found penguin adenovirus in Antarctica, entire genome sequencing and annual survey of penguin adenovirus were conducted. The entire genome sequences of penguin adeno...