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SUMMARY:High precision measurement of the form factors of the semileptonic
  decays K+- -> pi0 l+- nu (Kl3)
DTSTART;VALUE=DATE-TIME:20120611T151500Z
DTEND;VALUE=DATE-TIME:20120611T154000Z
DTSTAMP;VALUE=DATE-TIME:20130523T225837Z
UID:indico-contribution-6@cern.ch
DESCRIPTION:Speakers: WANKE\, Rainer (Johannes-Gutenberg-Universitaet  Mai
 nz (DE))\nSemileptonic kaon decays offer the most precise determination of
  the\nCKM matrix element |Vus|. The experimental precision is however\nlim
 ited by the knowledge of the form factors of this decay\, since\nthese ent
 er both the phase space integral and the detector\nacceptances. \nThe NA48
 /2 experiment presents new measurements of the form factors of\nthe semile
 ptonic decays of charged kaons\, based on 4.3 million Ke3 and\n3.5 million
  Kmu3 decays\, both with negligible background. The result\nmatches the pr
 ecision of the current world average on the vector and\nscalar form factor
 s and allows to significantly reduce the form factor\nuncertainty on |Vus|
 . In addition\, the comparison of both channels\nsets tight constraints on
  lepton flavor violation and other possible\nnew physics.\n\nhttp://indico
 .cern.ch/contributionDisplay.py?contribId=6&sessionId=2&confId=159431
LOCATION:Prague
URL:http://indico.cern.ch/contributionDisplay.py?contribId=6&sessionId=2&c
 onfId=159431
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