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SUMMARY:\\Xi to \\Lambda form factor
DTSTART;VALUE=DATE-TIME:20261011T082500Z
DTEND;VALUE=DATE-TIME:20261011T084000Z
DTSTAMP;VALUE=DATE-TIME:20261005T021636Z
UID:indico-contribution-2830@indico.itp.ac.cn
DESCRIPTION:Speakers: 付伟 张 (Inner Mongolia University)\nWe present a
  first-principles lattice QCD calculation of $\\Xi^{-} \\to \\Lambda $ for
 m factors using $2+1$ flavor gauge ensembles with lattice spacings ranging
  from 0.06 to 0.1 fm and pion masses between 230 and 340 MeV. This decay p
 rovides an independent avenue for determining the Cabibbo--Kobayashi--Mask
 awa matrix element $|V_{us}|$ in the baryon sector. We determine the full 
 set of vector and axial-vector transition form factors and their $q^{2}$ d
 ependence\, followed by a combined chiral and continuum extrapolation to t
 he physical point. Our preliminary prediction for the electron-channel bra
 nching fraction is consistent with the recent BESIII measurement\, which l
 ies 3.9 standard deviations below the previous world average.\n\nhttps://i
 ndico.itp.ac.cn/event/437/contributions/2830/
LOCATION:会议楼2 CXII103
URL:https://indico.itp.ac.cn/event/437/contributions/2830/
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