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SUMMARY:The hadronic light-by-light scattering contribution to the muon g-
 2
DTSTART;VALUE=DATE-TIME:20090604T100000Z
DTEND;VALUE=DATE-TIME:20090604T110000Z
DTSTAMP;VALUE=DATE-TIME:20261107T084012Z
UID:indico-event-1704@indico.ific.uv.es
DESCRIPTION:We briefly review the various contributions to the anomalous m
 agnetic moment of the muon in the Standard Model. We then focus on the had
 ronic light-by-light scattering contribution which is one major source of 
 uncertainty in the theoretical prediction. It cannot be directly related t
 o a measurable quantity and therefore one has to rely on hadronic models t
 o calculate it. In order to reduce this model dependence\, we present a ne
 w QCD short-distance constraint on the numerically dominant pion-exchange 
 contribution. We then evaluate this contribution in the framework of large
  N_C QCD\, using a pion-photon-photon form factor which fulfills all short
 -distance constraints. We also comment on the status of the other contribu
 tions in hadronic light-by-light scattering and give an outlook on how fur
 ther improvements could be achieved. Finally\, we present a new value for 
 the muon g-2 in the Standard Model.\n\nhttps://indico.ific.uv.es/event/170
 4/
LOCATION:Edf. Institutos de Investigación Sala Seminarios IFIC
URL:https://indico.ific.uv.es/event/1704/
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