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Título : Electron-positron annihilation into Φf(0)(980) and clues for a new 1(--) resonance
Autor : Napsuciale, Mauro; Oset, Eulogi; Sasaki, Kenji; Vaquera-Araujo, Carlos A.
Palabras clave : Hadronic cross-section
Radiative return
Chiral Lagrangians
Photon emission
Meson exchange
Form factors
Φ Decays
[PACS] Hadron production in e(−)e(+) interactions
[PACS] Meson–meson interactions (energy ≤ 10 GeV)
Fecha de publicación : 15-oct-2007
Editor: American Physical Society
Citación : Physical Review D 76(7): 074012 (2007)
Resumen: We study the e(+)e(-) -> Φππ reaction for pions in an isoscalar s wave which is dominated by loop mechanisms. For kaon loops we start from the conventional R chi PT, but use the unitarized amplitude for K[overline K]-ππ scattering and the full kaon form factor instead of the lowest order terms. We study also effects of vector mesons using R chi PT 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 m(π π) around the f(0)(980) as in the experiment. Selecting the Φf(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 Φf(0)(980) threshold, coupling strongly to this state.
Descripción : 14 pages, 4 figures.-- PACS nrs.: 13.66.Bc; 12.39.Fe; 13.75.Lb.-- ISI Article Identifier: 000250621200043.-- ArXiv pre-print available at: http://arxiv.org/abs/0706.2972
Versión del editor: http://dx.doi.org/10.1103/PhysRevD.76.074012
URI : http://hdl.handle.net/10261/9143
ISSN: 1550-7998
DOI: 10.1103/PhysRevD.76.074012
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