arXiv subjects
Publications and source records attributed to Ariel R. Zhitnitsky.
A brief review of particle physics motivations for axion existence is followed by a discussion of optical observables that can be used for axion detection. It is emphasised that the resonant photon - axion transition can occur in the presence of low density gas bringing the experimentally accessible quantities within the reach of the present day technology.
Arguments in favor of a large magnitude ( at least two- three times bigger than its factorized value) of the mixed vacuum condensate $ \la \bar{q}G_{μν}^a G_{μν}^a q \ra$ are given. The analysis is based on the strict inequalities which follow from the QCD sum rules method and on very plausible phenomenological assumptions like $ m_{B_s} > m_{B_u} $ for the few lowest exited $ Q\bar{q} $ states in a heavy quark limit $m_Q\rightarrow\infty $. The same arguments show the suppression of the $SU(3)$ symmetry breaking effects for vacuum condensates when the additional gluon fields are included.