Narrow Results

We study the strange quark mass effect on the phase diagram of strong interaction and the structure of compact stars with a thermodynamically enhanced perturbative QCD model by matching quark matter onto nuclear matter using the Gibbs conditions. It is found that the mass effect of strange quark matter can obviously stiffen the equation of state of mixed phases and result in more massive hybrid stars (HSs), while that usually lowers the maximum mass of pure quark stars. Given reasonable model parameters, the maximum mass of HSs can reach two times the solar mass and the stars always have mixed-phase core in a considerably wide range of model parameters.

Quasiclassical Trajectory (QCT) calculation for O(³P) + HD → OH + D and O(³P) + HD → OD + H at E_col = 0.4–1.0 eV and 0.5–1.0 eV, respectively, on the lowest PES 1 ³A″ of Kuppermann et al. has been done. Distribution p(ϑ_r) of azimuthal angles between the relative velocity k of the reactants and rotational angular momentum vector j′ of either OH or OD, p(φ_r) of polar as well as dihedral angles correlating k - k′ -j′, p(ϑ_r, φ_r), and PDDCS dependent upon the scattering angle ϑ_t of either OH, or OD between k and k′ of the reactants and products, respectively, are presented and discussed. The stereodynamics and isotopic mass effects at the smallest possible collision energies 0.4 eV and 0.5 eV for OH and OD, respectively, are significantly different. The significant mass effect with quotient 1/2 of H/D, at the corresponding collision threshold may be applied for the investigation of docking mechanism, drug modification and delivery.