6533b828fe1ef96bd1288f32
RESEARCH PRODUCT
Radiative decay of rho(0) and phi mesons in a chiral unitary approach
E. OsetSatoru HirenzakiHiroshi TokiEugenio Marcosubject
PhysicsNuclear and High Energy PhysicsParticle physicsPhotonNuclear TheoryMesonBranching fractionRadiative decayGamma rayFOS: Physical sciencesFísicaUnitary stateNuclear Theory (nucl-th)High Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)High Energy Physics::Experimentdescription
We study the rho^0 and phi decays into pi^+ pi^- gamma, pi^0 pi^0 gamma and phi into pi^0 eta gamma using a chiral unitary approach to deal with the final state interaction of the M M system. The final state interaction modifies only moderately the large momenta tail of the photon spectrum of the rho^0 --> pi^+ pi^- gamma decay. In the case of phi decay the contribution to pi^+ pi^- gamma and pi^0 pi^0 gamma decay proceeds via kaonic loops and gives a distribution of pi pi invariant masses in which the f_0(980) resonance shows up with a very distinct peak. The spectrum found for phi --> pi^0 pi^0 gamma decay agrees with the recent experimental results obtained at Novosibirsk. The branching ratio for phi --> pi^0 eta gamma, dominated by the a_0(980), is also in agreement with recent Novosibirsk results.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1999-03-01 |