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SUMMARY:A comprehensive amplitude analysis of photon-photon collision
DTSTART;VALUE=DATE-TIME:20140415T100000Z
DTEND;VALUE=DATE-TIME:20140415T110000Z
DTSTAMP;VALUE=DATE-TIME:20261015T213346Z
UID:indico-event-2068@indico.ific.uv.es
DESCRIPTION:\nWe perform an amplitude analysis on photon-photon scattering
  into\n pion and kaon pairs below 1.5 GeV. To get a model independent ampl
 itude as possible\,\nwe impose the basic constraints required by analytici
 ty\, unitarity\, and\ncrossing-symmetry. To fix the relative hadronic ampl
 itudes\, we include the\nlatest hadronic pipi\, KK scattering amplitudes g
 iven by dispersive\nanalysis\, supplemented in the KK threshold region by 
 the recent Dalitz\nplot analysis from BaBar. With these hadronic amplitude
 s and applying\nFinal State Interaction theorem\, we give an overall fit o
 f  gamma\ngamma-->pi pi datasets\, including the high statistics neutral p
 ion data of\nBelle. A region of solutions are found and what should be emp
 hasized\, the\nrelatively poor integrated cross-section data on  gamma gam
 ma -->K K\nnarrows the patch of solutions to essentially a single form. Fi
 nally we\npresent the photon couplings of scalars and tensors appear in th
 ese\nprocesses\, which are quite helpful to distinguish their structure.\n
 \nhttps://indico.ific.uv.es/event/2068/
LOCATION:IFIC Seminar Room 1.1.1.
URL:https://indico.ific.uv.es/event/2068/
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