EPJ Web Conf.
Volume 175, 201835th International Symposium on Lattice Field Theory (Lattice 2017)
|Number of page(s)||8|
|Section||14 Poster contributions|
|Published online||26 March 2018|
Update on ɛK with lattice QCD inputs
Lattice Gauge Theory Research Center, CTP, Department of Physics and Astronomy, Seoul National University, Seoul 08826, South Korea
2 Los Alamos National Laboratory, Theoretical Division T-2, Los Alamos, New Mexico 87545, USA
3 Brookhaven National Laboratory, Department of Physics, Upton, New York 11973, USA
* Speaker, e-mail: email@example.com
Published online: 26 March 2018
We report updated results for ɛK, the indirect CP violation parameter in neutral kaons, which is evaluated directly from the standard model with lattice QCD inputs. We use lattice QCD inputs to fix , and mc(mc). Since Lattice 2016, the UTfit group has updated the Wolfenstein parameters in the angle-only-fit method, and the HFLAV group has also updated |Vcb|. Our results show that the evaluation of ɛK with exclusive |Vcb| (lattice QCD inputs) has 4.0σ tension with the experimental value, while that with inclusive |Vcb| (heavy quark expansion based on OPE and QCD sum rules) shows no tension.
© The Authors, published by EDP Sciences, 2018
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