A hydrodynamic model, discussing neutral gases as well as plasmas, is applied to simulate single-bubble sonoluminescence. In this model, thermal conduction and various inelastic impact processes such as dissociation, ionization, and recombination are considered. Bremsstrahlung is assumed as the mechanism of the picosecond light pulse in sonoluminescence. Diatomic nitrogen and noble gas bubbles ...

In a recent paper [1], we presented the calculation of the O(α s) virtual corrections to b → s ℓ + ℓ − and of those bremsstrahlung terms which are needed to cancel the infrared divergences. In the present paper we work out the remaining O(α s) bremsstrahlung corrections to b → s ℓ + ℓ − , which do not suffer from infrared and collinear singularities. These new contributions turn out to be small...

In the Kaluza-Klein (KK) scenario with n large extra dimensions where gravity propagates in the 4+n dimensional bulk of spacetime while gauge and matter fields are confined to a four dimensional subspace, the light graviton KK modes can be produced in the Sun, red giants and supernovae. We study the energy-loss rates through photon-photon annihilation, electron-positron annihilation, gravi-Comp...

Neutrino-pair bremsstrahlung radiation is considered due to electron–phonon scattering of degenerate, relativistic electrons in a lattice of spherical atomic nuclei in a neutron star crust. The neutrino energy generation rate is calculated taking into account exact spectrum of phonons, the Debye–Waller factor, and the nuclear form–factor in the density range from 10 g cm to 10 g cm at arbitrary...