The ratios Rγ,l = B(Z → l+l−) ·σ(Zγ)/B(W → lν) ·σ(W±γ), Rγ,ν = B(Z → ν̄ν) · σ(Zγ)/B(W → lν) · σ(Wγ), RWγ = σ(Wγ)/σ(W), and RZγ = σ(Zγ)/ σ(Z) are studied as tools to probe the electroweak boson self-interactions. As a function of the minimum photon transverse momentum, Rγ,l and Rγ,ν are found to directly reflect the radiation zero present in Wγ production in the Standard Model. All four ratios ar...

Gene expression is highly regulated at the step of transcription initiation, and transcription activators play a critical role in this process. RbpA, an actinobacterial transcription activator that is essential in Mycobacterium tuberculosis (Mtb), binds selectively to group 1 and certain group 2 σ-factors. To delineate the molecular mechanism of RbpA, we show that the Mtb RbpA σ-interacting dom...

We study phase transitions of the ferromagnetic q-state Potts chain with random nearest-neighbor couplings having a variance Δ^{2} and with homogeneous long-range interactions, which decay with distance as a power r^{-(1+σ)}, σ>0. In the large-q limit the free-energy of random samples of length L≤2048 is calculated exactly by a combinatorial optimization algorithm. The phase transition stays fi...

Employing the experimental electro-weak interactions between quarks and leptons, the spin of the proton may easily be understood in terms of the spins of the constituent quarks. Before considering how one may obtain the spin of the proton from the spin of the constituitive qurks, let us recall a simple fact about total spin zero momentum space wave functions for any two spin one half particles;...

The detection and the research of the neutrinos background of Universe are the attractive problems. This problems do not seem the unpromising one in the case of the high neutrinos density that is necessary for the explanation of the nucleons-antinucleons asymmetry of Universe (the Pontekorvo’s and Smorodinsky’s hipothesis [1]). It was offered before to use the low energy neutrinos background of...