Abstract
Abstract
Angular distributions of photons with definite linear polarizations relative to the plane spanned by the momentum of initial electron and the total momentum of the V
1
V
1 pair in the reaction e
+
e
− → V → γ X (JP
) → γV
1
V
1 (V = J/ψ,ψ′,…, Υ(1S), Υ,… and V
1 = ρ,ω,ϕ,…) are calculated. It is shown that the sign of asymmetry of the distributions of photons polarized in the above plane and orthogonal to it correlates with the signature P(−1)
J
of the X resonance with given spin-parity JP
= 0±, 1±, 2± so it may help to establish this quantum number in a way which does not depend on the specific model of the X(JP
) → V
1
V
1 amplitude.
Subject
General Physics and Astronomy