منابع مشابه
ENHANCEMENT OF THE Λb DECAY RATE 1
The enhancement ∆Γ(Λb) of the Λb decay rate due to four-fermion processes of weak scattering and Pauli interference is calculated within the quark model. An estimate of the relative bu wave function at zero separation, |Ψ(0)|bu, is obtained in terms of the Σ ∗ b − Σb hyperfine splitting, the B∗ − B hyperfine splitting, and the B meson decay constant fB. For M(Σ∗b)−M(Σb) = 56±16 MeV,M(B ∗)−M(B) ...
متن کاملAngular analysis of the decay Λ b → Λ ( → Nπ ) ` + ` −
We study the differential decay rate for the rare Λb → Λ(→ Nπ)`+`− transition, including a determination of the complete angular distribution, assuming unpolarized Λb baryons. On the basis of a properly chosen parametrization of the various helicity amplitudes, we provide expressions for the angular observables within the Standard Model and a subset of new physics models with chirality-flipped ...
متن کاملThe λ Mechanism of the 0νββ-Decay
The λ mechanism (WL − WR exchange) of the neutrinoless double beta decay (0νββ-decay), which has origin in left-right symmetric model with right-handed gauge boson at TeV scale, is investigated. The revisited formalism of the 0νββ-decay, which includes higher order terms of nucleon current, is exploited. The corresponding nuclear matrix elements are calculated within quasiparticle random phase ...
متن کاملAlpha decay rate enhancement in metals: An unlikely scenario
In a recent publication, Kettner et. al. [1] have suggested that one could speed up alpha decay of transuranic nuclear waste material by embedding it in metals at low temperature. This would have a huge impact on waste disposal management and quite likely initiate a completely renewed public debate on the subject of nuclear energy. The proposed idea is that the electron screening provided by th...
متن کامل: the effect of sericin levels (silk glue protein) on rate of in vitro maturation, fertilization and culture of sheep oocytes
هدف از آزمایش اول بررسی اثر سطوح مختلف سریسین [0 (control), 0.1, 0.5, 1.0, 2.5 %] افزوده شده به محیط , ivm بر cumulus cell expansion، بلوغ هسته و توسعه متوالی جنین، در گوسفندان نژاد سنجابی در فصل تولید مثلی می باشد. از سرگیری میوز به وسیله خارج شدن اولین پولار بادی اندازه گیری و هم چنین درصد رسیدن جنین های دو سلولی به مرحله کلیواژ و بلاستوسیت نیز به عنوان نشانه ای از میزان شایستگی توسعه اولیه ج...
ذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics Letters B
سال: 1996
ISSN: 0370-2693
DOI: 10.1016/0370-2693(96)00352-8