4.7 Article

Updated evaluation of εK in the standard model with lattice QCD inputs

Journal

PHYSICAL REVIEW D
Volume 98, Issue 9, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.98.094505

Keywords

-

Funding

  1. Creative Research Initiatives Program of the National Research Foundation of Korea (NRF) grant - Korean government (MEST) [2017013332]
  2. KISTI supercomputing center through the strategic support program for the supercomputing application research [KSC-2015-G2-0002]
  3. Basic Science Research Program of the NRF - Ministry of Education [2014027937]

Ask authors/readers for more resources

We report a strong tension in epsilon(K) at the 4 sigma level between the experimental value and the theoretical value calculated directly from the standard model using lattice QCD inputs such as (B) over cap (K), vertical bar V-cb vertical bar, vertical bar V-us vertical bar, xi(0), xi(2) xi(LD), F-K, and m(c). The standard model with lattice QCD inputs describes only 70% of the experimental value of QCD, and does not explain its remaining 30%. We also find that this tension disappears when we use the inclusive value of vertical bar V-cb vertical bar. (results of the heavy quark expansion based on QCD sum rules) to determine epsilon(K). This tension is highly correlated with the present discrepancy between the exclusive and inclusive values of vertical bar V-cb vertical bar In order to resolve, in part, the issue with vertical bar V-cb vertical bar, it would be highly desirable to have a comprehensive reanalysis over the entire set of experimental data on the (B) over bar -> D*I (v) over bar decays using an alternative parametrization of the form factors, such as the Boyd, Grinstein, and Lebed parametrization, and a comparison with results of the Caprini, Lellouch, and Neubert method.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available