Bose-Einstein Correlation Functions Research Articles

Hadron interferometry revisited

The emperical relation for the two-particle Bose-Einstein correlation function used in many experimental and theoretical studies and involving one exponential is in contradiction with quantum statistics. It is shown that the correct formula contains two exponentials, the ratio of which depends only on the radius R and the chaoticity p of the source. The corresponding three-particle correlation is also derived. Possible important implications of these result for the determination of p and R are discussed.

The four-prong annihilation of 1.2 GeV/ c antiprotons in hydrogen (II) π+π+π−π−π0 final state

Approximately 17 000 four-prong annihilations of 1.2 GeV/ c antiprotons in hydrogen have been analyzed. The present report considers those events with one neutral pion (5π). The 5π events show production of ϱ 0, ϱ ±, f 0, ω 0, η 0 mesons, and the possibility of a ϱϱ enhancement at 1400 MeV/ c and/or a ϱπ enhancement at 1080 MeV/ c is considered. The influence of the Bose-Einstein correlation function of Goldhaber et al. [6] is investigated. Centre-of-mass angular distributions of the pions and centre-of-mass opening angles between pairs of pions are presented. The production upper limits at the 95% confidence level, for several resonant states are given.