We calculate the decay constants of Ds and D ∗ s with B̄ 0 → D+l−ν and B̄0 → D+D s decays. In our analysis we take the factorization method with considering non-factorizable term contributions and used two different form factor behaviours (constant and monopoletype) for F0(q 2). We also consider the QCD-penguin and Electroweak-penguin contributions in hadronic decays within the NDR renormalizatio...

We perform a combined analysis of B → ππ and B → πK decays with the current experimental data. Assuming SU(3) flavor symmetry and no new physics contributions to the topological amplitudes, we demonstrate that the conventional parametrization in the Standard Model (SM) does not describe the data very well, in contrast with a similar analysis based on the earlier data. It is also shown that the ...

At present, there are discrepancies between the measurements of several observables in B → πK decays and the predictions of the standard model (the “B → πK puzzle”). Although the effect is not yet statistically significant – it is at the level of >∼ 3σ – it does hint at the presence of new physics. In this paper, we explore whether supersymmetry (SUSY) can explain the B → πK puzzle. In particul...

We consider the gluon dipole penguin operator contributions to ǫ′/ǫ and CP violation in hyperon decays. It has been proposed by Bertolini et al. that the contribution to ǫ′/ǫ may be significant. We show that there is a cancellation in the leading order contribution and this contribution is actually suppressed by a factor of order O(mπ,m 2 K)/Λ 2. We find that the same operator also contributes ...

Weak radiative baryonic B decays B → B1B2γ mediated by the electromagnetic penguin process b → sγ have appreciable rates larger than their two-body counterparts B → B1B2. The branching ratios for B → Λp̄γ and B → Ξ0Σ̄−γ are sizable, falling into the range of (1 ∼ 6) × 10−6 with the value preferred to be on the large side, and not far from the bottom baryon radiative decays Λb → Λγ and Ξb → Ξγ due...

The penguin wing oyster Pteria penguin whole body extract was obtained with different solvents. The whole body extracts were assayed for antibacterial activity using agar well diffusion technique against human pathogens. The extracts derived from acetone and chloroform exhibited broad antibacterial activity. Highest activity was exhibited against Klebsiella pneumoniae (6 mm) and Staphylococcus ...

The measured value of Ab, the Zbb asymmetry parameter, disagrees with the Standard Model at 99% confidence level (2.6σ). If genuine the discrepancy could indicate new interactions unique to third generation quarks, implying an enhanced Z penguin amplitude and an enhanced rate for the rare decay K+ → π+νν. Measurements of ǫ/ǫ then suggest there should also be enhanced QCD penguin amplitudes. The...

Constraints on angles of Unitarity triangle are reviewed, and in particular constraint on γ from limit on ∆m s is emphasized. Effects of penguin diagram on measurement of β and α are then reviewed. New measurements on B → π + π − in QCD improved factorization approximation suggest large penguin effects. It is possible to estimate the error in measurement of α as a function of γ for different |V...

We discuss about a possibility of large electro-weak penguin contribution in B → Kπ from recent experimental data. The several relations among the branching ratios which realize when the contributions from tree type and electro-weak penguin are small compared with the gluon penguin and can be treated as the expansion parameters do not satisfy the data. The difference comes from the r terms whic...