We re–investigate the question whether a light higgsino–like neutralino is a viable Dark Matter candidate. To this end we compute the dominant one–loop corrections to the masses of the higgsino–like states in the minimal Supersymmetric Standard Model (MSSM), due to loops involving heavy quarks and their superpartners. We also calculate analogous corrections to the couplings of higgsino–like neu...

Proton Compton scattering and photoproduction of vector mesons at high energies are studied in terms of the quark model. It is shown that under the vector meson dominance hypothesis the quark model gives the rP total hadronic cross section in good agreement with the experimental data. The real-to-imaginary ratio of forward proton Compton scattering is related to the total cross sections and the...

The tensor polarization is known to be the specific property of the particles with spin larger than 1 2 . The deuteron is one of the most fundamental spin-1 particles, and the effects of its tensor polarization are intensively studied at low and intermediate energies. Such effects should also be manifested for deep inelastic scattering (DIS) off deuteron target, resulting in the new structure f...

Let ξ be a smooth oriented vector bundle, with n-dimensional fibre, over a smooth manifold M . Denote by ξ̂ the fibrewise one-point compactification of ξ. The main purpose of this paper is to define geometrically a canonical element Υ(ξ) in H(ξ̂,Q) (H(ξ̂,Z) ⊗ 12 , to be more precise). The element Υ(ξ) is a secondary characteristic class to the Euler class in the fashion of Chern-Simons. Two proper...

A semiphenomenological approach to the nucleon self-energy in nuclear matter at nite temperatures is followed. It combines elements of Thermo Field Dynamics for the treatment of nite temperature with a model for the self-energy, which evaluates the second order diagrams taking the needed dynamics of the NN interaction from experiment. The approach proved to be accurate at zero temperature to re...

The flux-across-surfaces conjecture represents a corner stone in quantum scattering theory because it is the key-assumption needed to prove the usual relation between differential cross section and scattering amplitude. We improve a recent result [TDMB] by proving the conjecture also in presence of zero-energy resonances or eigenvalues, both in point and potential scattering.

We report the observation of Higgs boson decays to WW based on an excess over background of 6.1 standard deviations in the dilepton final state, where the Standard Model expectation is 5.8 standard deviations. Evidence for the vector-boson fusion (VBF) production process is obtained with a significance of 3.2 standard deviations. The results are obtained from a data sample corresponding to an i...

We calculate several “size-like” B observables within the microscopic threecluster model and study their potential constraints on the zero-energy astrophysical S17(0) factor of the Be(p, γ)B reaction. We find within our threecluster model that a simultaneous reproduction of the experimental data for the B radius and quadrupole moment and of the B-Li Coulomb displacement energy implies S17(0) = ...

The cross section for producing W Z pairs at hadron colliders is calculated to order α s for general C and P conserving W W Z couplings. The effects of the next-to-leading-order corrections on the derived sensitivity limits for anomalous W W Z couplings are discussed. The prospects for observing the approximate amplitude zero, which is present in the standard model W Z helicity amplitudes, are ...

To characterize pulmonary and total body norepinephrine and epinephrine kinetics in the immediate newborn period, the effects of desipramine were studied in six fetal lambs chronically instrumented at 133-134 days gestation (term 147 days) and delivered 1 wk later by cesarean section under spinal anesthesia. Norepinephrine and epinephrine kinetics were determined with isotope dilution methodolo...