Ring and jet study on the azimuthal substructure of pions at CERN SPS energy

Pramana

Prosenjit Saha¹  Dipak Ghosh²  Sanjib Kumar Manna¹  Prabir Kumar Haldar1¹ 

[1] Department of Physics, Dinhata College, Cooch Behar 736 135, India$$;Department of Physics, Jadavpur University, Kolkata 700 032, India$$

关键词: Ring-like and jet-like events;    pseudorapidity;    Monte-Carlo simulations;    Cherenkov gluons radiation.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

We have presented an investigation on the ring- and jet-like azimuthal angle sub-structures in the emission of secondary charged hadrons coming from 32S–Ag/Br interactions at 200 A GeV/c. Nuclear photographic emulsion technique has been employed to collect the experimental data. The presence of such substructures, their average behaviour, their size, and their position of occurrence have been examined. The experimental results have also been compared with the results simulated by Monte-Carlo method. The analysis strongly indicates the presence of ring- and jet-like structures in the experimental distributions of particles beyond statistical noise. The experimental results are in good agreement with I M Dremin idea, that the phenomenon is similar to the emission of Cherenkov electromagnetic radiation.

【 授权许可】

Unknown