Peculiarities in produced particles emission in 208Pb + Ag(Br) interactions at 158 A GeV/c

TL;DR

This study investigates angular particle emission patterns in lead-emulsion collisions at high energy, revealing ring-like structures consistent with Cherenkov radiation mechanisms, thus providing insights into nuclear collision dynamics.

Contribution

It reports the first observation of nonstatistical ring-like emission structures in 208Pb + Ag(Br) collisions at 158 A GeV/c, supporting Cherenkov-like radiation models.

Findings

Detection of nonstatistical ring-like substructures in azimuthal particle distributions

Parameters of ring-like structures consistent with Cherenkov radiation theory

Evidence of symmetrical emission cones in forward and backward directions

Abstract

The angular structures of particles produced in 208Pb induced collisions with Ag(Br) nuclei in an emulsion detector at 158 A GeV/c have been investigated. Nonstatistical ring-like substructures in azimuthal plane of the collision have been found and their parameters have been determined. The indication on the formation of the ring-like substructures from two symmetrical emission cones - one in the forward and other in the backward direction in the center-of mass system have been obtained. The ring-like substructures parameters have been determined. The experimental results are in an agreement with I.M. Dremin idea, that mechanism of the ring-like substructures formation in nuclear collisions is similar to that of Cherenkov electromagnetic radiation.