arXiv subjects

A. Ya. Parkhomenko

Publications and source records attributed to A. Ya. Parkhomenko.

21 records · Page 2Linked to original sources

arXiv1994

On Collinearization of Quarks in Quark-Gluon Decays of Heavy Orthoquarqonia

The decay of heavy orthoquarkonium into quark-antiquark pair and two gluons is considered. The differential probability of the decay in the tree approximation is calculated and the final quark mass influence on the quark and gluon distribution functions is studied. It is shown that the collinear strengthening of the bottomonium decay probability takes place at the $u \bar u$-, $d \bar d$- and $s \bar s$- pair production and is absent at the $c \bar c$- production.

hep-ph↗

arXiv1994

Double radiative decay $Z \rightarrow f\bar{f}γγ$ in the Standard Model

Z-boson decay $Z \rightarrow f\tilde{f}γγ$ in the Standard Model is analysed. The distribution function on the invariant masses of the photon and fermion pairs is calculated in the leading logarithmic approximation. It is shown that this distribution function has a specific shape of a ``crest''. (To be published in Mod.Phys.Lett.A)

hep-ph↗

arXiv1994

On collinearization of quarks in the quark-gluon decays of heavy orthoquarkonia

The decay of heavy orthoquarkonium into quark-antiquark pair and two gluons is considered. The differential probability of the decay in the tree approximation is calculated and the probability distributions of quarks and gluons are obtained. The collinear enhancement of the bottomonium decay is shown to take place at the uū--, dd and ss-- pair production and to be absent at the cc-- production. Some other peculiarities of the considered decays are discussed. (Published in Mod.Phys.Lett A 9 (1994) 115).

hep-ph↗