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Radiative decays of heavy quarkonia into two vector mesons. Spin properties of amplitudes and angular distributions of linearly polarized photons

Name: Radiative decays of heavy quarkonia into two vector mesons. Spin properties of amplitudes and angular distributions of linearly polarized photons
Creator: A A Kozhevnikov
Keywords: 0103 physical sciences, 01 natural sciences, 7. Clean energy

descriptionPublicationkeyboard_double_arrow_right Article , Other literature type 01 Jan 2020Publisher:IOP PublishingJournal:Journal of Physics: Conference Series, volume 1,435, page 12,018 (issn: 1742-6588, eissn: 1742-6596,

Authors: A A Kozhevnikov;

doi: 10.1088/1742-6596/1435/1/012018

Radiative decays of heavy quarkonia into two vector mesons. Spin properties of amplitudes and angular distributions of linearly polarized photons

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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.

Related Organizations

Novosibirsk State University
Russian Federation
Sobolev Institute of Mathematics
Russian Federation

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