Chiral loops and a0(980) exchange in φ → π0ηγ

A. Bramon; R. Escribano; J. L. Lucio M; M. Napsuciale; G. Pancheri

doi:10.1016/S0370-2693(00)01204-1

Chiral loops and a₀(980) exchange in φ → π⁰ηγ

A. Bramon, R. Escribano^*, J. L. Lucio M, M. Napsuciale, G. Pancheri

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › Research › peer-review

26 Citations (Scopus)

Abstract

The radiative φ → π⁰ηγ decay is discussed emphasizing the effects of the a₀(980) scalar resonance which dominates the high values of the π⁰η invariant mass spectrum. In its lowest part, the proposed amplitude coincides with the reliable and ChPT-inspired contribution coming from chiral loops. The a₀(980) resonance is then incorporated exploiting the complementarity between ChPT and the linear sigma model for this channel. The recently reported experimental invariant mass distribution and branching ratio can be satisfactorily accommodated in our framework. For the latter, a value of B(φ → π⁰ηγ) in the range (0.75-0.95) x 10^-4 is predicted. (C) 2000 Elsevier Science B.V.

Original language	English
Pages (from-to)	221-228
Number of pages	8
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	494
Issue number	3-4
DOIs	https://doi.org/10.1016/S0370-2693(00)01204-1
Publication status	Published - 30 Nov 2000

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title = "Chiral loops and a0(980) exchange in φ → π0ηγ",

abstract = "The radiative φ → π0ηγ decay is discussed emphasizing the effects of the a0(980) scalar resonance which dominates the high values of the π0η invariant mass spectrum. In its lowest part, the proposed amplitude coincides with the reliable and ChPT-inspired contribution coming from chiral loops. The a0(980) resonance is then incorporated exploiting the complementarity between ChPT and the linear sigma model for this channel. The recently reported experimental invariant mass distribution and branching ratio can be satisfactorily accommodated in our framework. For the latter, a value of B(φ → π0ηγ) in the range (0.75-0.95) x 10-4 is predicted. (C) 2000 Elsevier Science B.V.",

author = "A. Bramon and R. Escribano and {Lucio M}, {J. L.} and M. Napsuciale and G. Pancheri",

note = "Funding Information: We would like to thank A. Farilla for helpful comments and clarifying discussions. Work partly supported by the EEC, TMR-CT98-0169, EURODAPHNE network. Work also partly supported by the CONACyT (project I27604-E). J.L. Lucio M. acknowledges partial financial support from CONACyT and CONCyTEG.",

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doi = "10.1016/S0370-2693(00)01204-1",

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T1 - Chiral loops and a0(980) exchange in φ → π0ηγ

AU - Bramon, A.

AU - Escribano, R.

AU - Lucio M, J. L.

AU - Napsuciale, M.

AU - Pancheri, G.

N1 - Funding Information: We would like to thank A. Farilla for helpful comments and clarifying discussions. Work partly supported by the EEC, TMR-CT98-0169, EURODAPHNE network. Work also partly supported by the CONACyT (project I27604-E). J.L. Lucio M. acknowledges partial financial support from CONACyT and CONCyTEG.

PY - 2000/11/30

Y1 - 2000/11/30

N2 - The radiative φ → π0ηγ decay is discussed emphasizing the effects of the a0(980) scalar resonance which dominates the high values of the π0η invariant mass spectrum. In its lowest part, the proposed amplitude coincides with the reliable and ChPT-inspired contribution coming from chiral loops. The a0(980) resonance is then incorporated exploiting the complementarity between ChPT and the linear sigma model for this channel. The recently reported experimental invariant mass distribution and branching ratio can be satisfactorily accommodated in our framework. For the latter, a value of B(φ → π0ηγ) in the range (0.75-0.95) x 10-4 is predicted. (C) 2000 Elsevier Science B.V.

AB - The radiative φ → π0ηγ decay is discussed emphasizing the effects of the a0(980) scalar resonance which dominates the high values of the π0η invariant mass spectrum. In its lowest part, the proposed amplitude coincides with the reliable and ChPT-inspired contribution coming from chiral loops. The a0(980) resonance is then incorporated exploiting the complementarity between ChPT and the linear sigma model for this channel. The recently reported experimental invariant mass distribution and branching ratio can be satisfactorily accommodated in our framework. For the latter, a value of B(φ → π0ηγ) in the range (0.75-0.95) x 10-4 is predicted. (C) 2000 Elsevier Science B.V.

UR - http://www.scopus.com/inward/record.url?scp=0034736083&partnerID=8YFLogxK

U2 - 10.1016/S0370-2693(00)01204-1

DO - 10.1016/S0370-2693(00)01204-1

M3 - Article

AN - SCOPUS:0034736083

SN - 0370-2693

VL - 494

SP - 221

EP - 228

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 3-4

ER -

Chiral loops and a₀(980) exchange in φ → π⁰ηγ

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