Electron-positron annihilation into phi f(0)(980) and clues for a new 1(--) resonance
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Electron-positron annihilation into phi f(0)(980) and clues for a new 1(--) resonance

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Electron-positron annihilation into phi f(0)(980) and clues for a new 1(--) resonance

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Napsuciale, Mauro; Oset Báguena, Eulogio Perfil; Sasaki, Kenji; Vaquera Araujo, Carlos Alberto
Aquest document és un/a article, creat/da en: 2007
We study the e^{+}e^{-} to phi pi pi reaction for pions in an isoscalar s-wave which is dominated by loop mechanisms. For kaon loops we start from the conventional RCHPT, but use the unitarized amplitude for KbarK-pipi scattering and the full kaon form factor instead of the lowest order terms. We study also effects of vector mesons using RCHPT supplemented with the conventional anomalous term for VVP interactions and taking into account the effects of heavy vector mesons in the K*K transition form factor. We find a peak in the dipion invariant mass around the f_{0}(980) as in the experiment. Selecting the phi f_{0}(980) contribution as a function of the e^{+}e^{-} energy we also reproduce the experimental data except for a narrow peak, yielding support to the existence of a 1^{--} resonance above the phi f_{0}(980) threshold, coupling strongly to this state.

    Napsuciale, Mauro Oset Báguena, Eulogio Sasaki, Kenji Vaquera Araujo, Carlos Alberto 2007 Electron-positron annihilation into phi f(0)(980) and clues for a new 1(--) resonance Physical Review D 76 7 074012
http://dx.doi.org/10.1103/PhysRevD.76.074012
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