PoS - Proceedings of Science
Volume 256 - 34th annual International Symposium on Lattice Field Theory (LATTICE2016) - Poster Session
Status report on $\varepsilon_K$ with lattice QCD inputs
W. Lee,* J. Bailey, J. Leem, S. Park, Y.C. Jang SWME Collaboration
*corresponding author
Full text: pdf
Pre-published on: December 27, 2016
Published on: March 24, 2017
Abstract
We report the current status of $\epsK$, the indirect CP
violation parameter in the neutral kaon system, evaluated using the
lattice QCD inputs.
We use lattice QCD to fix $\BK$, $\xi_0$, $\xi_2$,
$|V_{us}|$, $m_c(m_c)$, and $|V_{cb}|$.
Since Lattice 2015, FLAG updated $\BK$, exclusive $V_{cb}$ has been
updated with new lattice data in the $\bar{B}\to D\ell\nu$ decay channel, and
RBC-UKQCD has updated $\xi_0$ and $\xi_2$.
Our preliminary results show that the standard model evaluation
of $\epsK$ with exclusive $|V_{cb}|$ (lattice QCD inputs) has
$3.2\sigma$ tension with the experimental value, while that of
$\epsK$ with inclusive $|V_{cb}|$ (heavy quark expansion) shows no
tension.
DOI: https://doi.org/10.22323/1.256.0383
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