Wavelet analysis of angular distributions of secondary particles in high
energy nucleus-nucleus interactions. Irregularity of particle pseudorapidity
distributions
Experimental data on sulphur and oxygen nuclei interactions with
photoemulsion nuclei at the energies of 200 and 60 GeV/nucleon are analyzed
with the help of a continuous wavelet transform. Irregularities in
pseudorapidity distributions of narrow groups of the secondary shower particles
in the mentioned interactions are observed at application of the second order
derivative of Gaussian as a wavelet. The irregularities can be interpreted as
an existence of the preference emission angles of groups of particles. Such an
effect is expected at emission of Cherenkov gluons in nucleus-nucleus
collisions. Some of the positions of the observed peculiarities on the
pseudorapidity axis coincide with those found by I.M.Dremin et al. (I.M.Dremin
et al. Phys. Lett., 2001, v. B499, p. 97).)Comment: 11 pages, 7 figure