A study of n̅ρ annihilations between 0.5 and 0.8 GeV/c

Abstract

A study of n̅p annihilations with n̅ momentum between 0.5 and 0.8 GeV/c is presented. The search for s-channel resonances in n̅p annihilations reveal possibly two narrow structures in the odd pions final state. Inclusive ρ⁰ and ƒ⁰ cross sections in n̅p annihilations have been estimated to be 9.0±0.6 mb and 3.4±0.6 mb respectively. Longitudinal and transverse momentum distributions for inclusive ρ⁰ production have been presented. A study of resonance production in exclusive final state reveals ρ⁰ production to be dominant in the odd pion final states and ρ⁺, ω⁰ productions are most important for the even pion final states. The π⁺π^– effective mass spectra in the backward and the forward directions in the n̅ρ c.m. system have been examined for a possible ρ-ω interference effect.