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SUMMARY:e+ e- -> phi [pi pi]_{I=J=0} in UCHPT and the new resonance X(2175
 ).
DTSTART;VALUE=DATE-TIME:20070525T100000Z
DTEND;VALUE=DATE-TIME:20070525T110000Z
DTSTAMP;VALUE=DATE-TIME:20261112T101108Z
UID:indico-event-1570@indico.ific.uv.es
DESCRIPTION:We present results for e+ e- annihilation into phi pi pi\, wit
 h the pi pi pair in an isoscalar s-wave\, within unitarized chiral perturb
 ation theory. This process is induced at one loop level in this framework 
 and we use the unitarized kaon form factor instead of the lowest order ter
 ms in order to account for the high virtuality of the exchanged photon. We
  also study effects of vector mesons (K*) in the loops taking into account
  effects of heavy vector mesons in the K*K transition form factor. As a re
 sult\, for dipion invariant mass close to the f0(980) pole we obtain a pro
 per description of events in the background of recent BABAR data for e+ e-
  ->phi f0 but not of the resonant events around sqrt(s)= 2175 MeV. We fina
 lly discuss the possibility of a three body structure for this resonance.\
 n\nhttps://indico.ific.uv.es/event/1570/
LOCATION:Edf. Institutos de Investigación Sala Seminarios IFIC
URL:https://indico.ific.uv.es/event/1570/
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