NLL Corrections for B-Meson Radiative Exclusive Decays

We calculate the next-to-leading corrections to the branching ratio of exclusive $B\to K^* \gamma$ decay. The renormalization scale dependence is reduced compared to the leading logarithmic result but there remains a dependence on a cutoff parameter of the hadronic model. The calculated corrections increase the predicted branching ratio by about 10%, but it remains in agreement with the experimental value.Comment: 16 pages, 8 figure

The Antioxidant and Antimicrobial of Syrian Sumac (Rhus coriaria) Fruit Extracts

This study aimed at assaying the antioxidant activities of Syrian sumac (Rhus coriaria) . The proximate analysis revealed that Syrian sumac contains higher percentage of fat , carbohydrate , protein and ash 18.74 , 71.21 , 4.69 and 2.93 % respectively . All extracts 1,4 and 2 showed antioxidant effects compared with ?- tocopherol . But the antioxidant effects of all extracts was low compared with BHT . While the extracts 3 has no effect in preventing lipid peroxidation 37.87% at 5 mg / ml after 1 day . The antimicrobial activity of Rhus coriaria extracts were tested against six strains including three Gram –positive and three Gram –negative . Bacillus subtilis was found to be the most sensitive Gram –positive with MIC of 0.5 mg / ml , while Gram –negative bacteria were affected by higher concentrations of sumac extracts ranging 10-20 mg / ml . Among bacteria , the inhibitory effects was increased with the increase of R . coriaria fruit extracts concentration from 0.1 to 20 mg / ml . The findings demonstrate that sumac can be used as a natural antioxidant and antimicrobial

CP Asymmetry for Inclusive Decay B→Xd+γB \to X_d + \gamma in the Minimal Supersymmetric Standard Model

We study the inclusive rare decay $B\to X_d+\gamma$ in the supergravity inspired Minimal Supersymmetric Standard Model and compute the CP-asymmetry in the decay rates. We show that there exist two phenomenologically acceptable sets of SUSY parameters: for one set the CP-asymmetry has the same (positive) sign as in the Standard Model and lies in the range (5-45)% while for the other set it is negative with values within -(2-21)%.Comment: 15 pages, uses axodraw.st

Complete NNLO QCD Analysis of B -> X_s l^+ l^- and Higher Order Electroweak Effects

We complete the next-to-next-to-leading order QCD calculation of the branching ratio for B -> X_s l^+ l^- including recent results for the three-loop anomalous dimension matrix and two-loop matrix elements. These new contributions modify the branching ratio in the low-q^2 region, BR_ll, by about +1% and -4%, respectively. We furthermore discuss the appropriate normalization of the electromagnetic coupling alpha and calculate the dominant higher order electroweak effects, showing that, due to accidental cancellations, they change BR_ll by only -1.5% if alpha(mu) is normalized at mu = O(m_b), while they shift it by about -8.5% if one uses a high scale normalization mu = O(M_W). The position of the zero of the forward-backward asymmetry, q_0^2, is changed by around +2%. After introducing a few additional improvements in order to reduce the theoretical error, we perform a comprehensive study of the uncertainty. We obtain BR_ll(1 GeV^2 <= q^2 <= 6 GeV^2) = (1.57 +- 0.16) x 10^-6 and q_0^2 = (3.76 +- 0.33) GeV^2 and note that the part of the uncertainty due to the b-quark mass can be easily reduced.Comment: 26 pages, 7 figures; v5: corrected normalisation in Eq. (5), numerical results unchange

The efficiency of biosynthesized Zinc oxide nanoparticles by Fusarium sp. against Saprolegnia parasitica isolated from common carp eggs in fish hatchery

Saprolegnia spp. infect common carp (Cyprinus carpio L.) eggs in hatcheries. Therefore, this study aimed to evaluate the antifungal effect of biosynthesized zinc oxide nanoparticles (ZnNPs) against Saprolegnia spp. as an eco-friendly treatment. Biosynthesized ZnNPs were characterized using atomic force microscope (AFM), size distributor and Ultra Violate-Visible spectrometer (Uv-Vis), and Scanning &nbsp; Electron Microscope (SEM). Biosynthesized (ZnNPs) had a spherical shape with diameters ranging 10-70 nm. Antifungal activity was tested by fungal radial growth inhibition on corn meal agar. The highest concentration of 100 ppm of ZnNPs showed a remarkable inhibition rate of 79% against Saprolegnia spp., demonstrating similar efficiency as the positive control i.e. malachite green in the inhibition&nbsp;percentage rate of fungal growth. This study showed that biosynthesized zinc oxide nanoparticles had a significant antifungal effect (P&lt;0.05) and can be used as an alternative option to control Saprolegnia spp. in fish hatcheries

Calculation of two-loop virtual corrections to b --> s l+ l- in the standard model

We present in detail the calculation of the virtual O(alpha_s) corrections to the inclusive semi-leptonic rare decay b --> s l+ l-. We also include those O(alpha_s) bremsstrahlung contributions which cancel the infrared and mass singularities showing up in the virtual corrections. In order to avoid large resonant contributions, we restrict the invariant mass squared s of the lepton pair to the range 0.05 < s/mb^2 < 0.25. The analytic results are represented as expansions in the small parameters s/mb^2, z = mc^2/mb^2 and s/(4 mc^2). The new contributions drastically reduce the renormalization scale dependence of the decay spectrum. For the corresponding branching ratio (restricted to the above s-range) the renormalization scale uncertainty gets reduced from +/-13% to +/-6.5%.Comment: 41 pages including 9 postscript figures; in version 2 some typos and inconsistent notation correcte

Новый переносчик вируса Х картофеля - гриб Phytophthora infestans (Mont.) de Bary

Prove participation in the dissemination of the potato virus X zoospores of the fungus Phytophthora infestans. The minimum period for the acquisition virofornos was 12 hours of infection 72 hours after exposure to suspensions, zoospores at a donor within 24 hours, the efficiency of transmission increased. We found that the activity of transmission varies depending on the infected variety and soil temperature. And also influence of nitrates on growth and on number zoospores fungi Ph. infestans.В статье рассматриваются доказательства участия зооспор гриба Phytophthora infestans в распространении Х вируса картофеля. Также рассматриваются условия передачи вируса Х картофеля. Минимальный период времени для приобретения вирофорности составил 12 часов, для передачи инфекции - 72 часа; после экспозиции суспензии зооспор на доноре в течение 24 часов эффективность передачи возрастала. Найдено, что активность передачи и скорость распространения инфекции варьируют в зависимости от инфицируемого сорта и температуры почвы. В лабораторных экспериментах показано, что содержание нитратов в среде влияет на рост гриба Ph. infestans и на численность образующихся зооспор

More Model-Independent Analysis of b->s Processes

We study model-independently the implications of non-standard scalar and pseudoscalar interactions for the decays b ->s gamma, b -> s g, b -> s l^+l^- (l=e,mu) and B_s -> mu^+ mu^-. We find sizeable renormalization effects from scalar and pseudoscalar four-quark operators in the radiative decays and at O(alpha_s) in hadronic b decays. Constraints on the Wilson coefficients of an extended operator basis are worked out. Further, the ratios R_H = BR(B -> H mu^+ mu^-)/BR(B -> H e^+ e^-), for H=K^(*), X_s, and their correlations with B_s -> mu^+ mu^- decay are investigated. We show that the Standard Model prediction for these ratios defined with the same cut on the dilepton mass for electron and muon modes, R_H= 1 + O(m^2_mu/m^2_b), has a much smaller theoretical uncertainty (<1%) than the one for the individual branching fractions. The present experimental limit R_K < 1.2 puts constraints on scalar and pseudoscalar couplings, which are similar to the ones from current data on BR(B_s -> mu^+ mu^-). We find that new physics corrections to R_{K*} and R_{X_s} can reach 13% and 10%, respectively.Comment: 28 pages, 6 figures; Table 1 updated, two refs added (to appear in PRD

Lepton polarization asymmetry and forward backward asymmetry in exclusive B->K_1 tau^(+)tau^(-) decay in universal extra dimension scenario

Decay rate, forward-backward asymmetry and polarization asymmetries of final state leptons in B-> K_{1}tau ^{+}tau ^{-}, where K_{1} is the axial vector meson, are calculated in Standard Model and in the universal extra dimension (UED) model. The sensitivity of the observables on the compactification radius $R$, the only unknown paramter in UED model, is studied. Finally, the helicity fractions of the final state K_{1} are calculated and their dependence on the compactification radius is discussed. This analysis of helicity fraction is briefly extended to B->K^{*}l ^{+}l ^{-}(l =e,mu) and compared with the other approaches exist in the literatureComment: 19 pages, 6 figure