Speaker
Takeshi Yamazaki
(Univerity of Tsukuba)
Description
We determine the value of $|V_{us}|$ using the kaon semileptonic form
factor calculated from the PACS10 configurations, whose physical
volumes are more than (10 fm)$^4$ at the physical point. The configurations
were generated using the Iwasaki gauge action and $N_f=2+1$ stout-smeared
nonperturbatively $O(a)$ improved Wilson quark action at the three lattice
spacings, 0.085, 0.063, and 0.041 fm. We present a preliminary result of the
kaon semileptonic form factor calculated at the smallest lattice spacing.
The value of $|V_{us}|$ in the continuum limit evaluated from our results
including the new data is also presented. We compare our result of $|V_{us}|$
with the previous results and those through the kaon leptonic decay.
| Topical area | Quark and Lepton Flavor Physics |
|---|
Primary author
Takeshi Yamazaki
(Univerity of Tsukuba)
Co-authors
Ken-Ichi Ishikawa
(Hiroshima U.)
Naruhito Ishizuka
(University of Tsukuba)
Yoshinobu Kuramashi
(University of Tsukuba)
Yusuke Namekawa
(Hiroshima University)
Yusuke Taniguchi
(University of Tsukuba)
naoya ukita
(Tsukuba University)
Tomoteru Yoshie
(University of Tsukuba)