The energy dependence of the chaoticity λ parameter from BEC of π-pairs produced in pp collisions

2016/06/28 by Alexander, G., Okorokov, V. A.
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.1606.08665

Abstract

The √s_pp behavior of the chaoticity parameter λ, derived from Bose - Einstein Correlations (BEC) of pion-pairs produced in pp collisions, is investigated. Considered are the one and three dimensions (1D, 3D) of the BEC analyzed in terms of a Gaussian and/or Exponential distributions. A marked difference is observed between the λ dependence on energy in the 1D and the 3D analyzes. The experimental data are examined in terms of the relation between the pion cluster of sources and the BEC dimension R which in turn are deduced from the charged outgoing particle multiplicity. While in this approach the general decrease with energy of the 1D λ is accounted for it fails to represent the few 3D λ data which are seen to remain constant with energy above ∼200 GeV.

Related

• Energy dependence of source geometry and chaoticity in hadronic collisions from Bose-Einstein correlations
• Change with energy of source geometry as seen in hadron interferometry
• Analysis of Bose-Einstein correlations at fixed multiplicities in TeV energy pp collisions in the quantum optical approach
• On long-range pionic Bose-Einstein correlations -- Including analyses of OPAL, L3 and CMS BECs
• Analyses of multi-pion Bose-Einstein correlations for granular sources with coherent pion-emission droplets