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Publication Information
Title Long-distance contribution to epsilon_K from lattice QCD
Abstract A lattice QCD approach to the calculation of the long-distance contributions to epsilon_K is presented. This parameter describes indirect CP violation in K ? ?? decay. While the short-distance contribution to epsilon_K can be accurately calculated in terms of standard model parameters and a single hadronic matrix element, B_K, there is a long-distance part which is estimated to be approximately 5% of the total and is more difficult to determine. A method for determining this small but phenomenologically important contribution to epsilon_K using lattice QCD is proposed and a complete exploratory calculation of the contribution is presented. This exploratory calculation uses an unphysical light quark mass corresponding to a 339 MeV pion mass and an unphysical charm quark mass of 968 MeV, expressed in the MS scheme at 2 GeV. This calculation demonstrates that future work should be able to determine this long-distance contribution from first principles with a controlled error of 10%
Author(s) Ziyuan Bai, Norman Christ, Joseph Karpie, Christopher Sachradja, Amarjit Soni, Bigeng Wang
Publication Date March 2024
Document Type Journal Article
Primary Institution Columbia University ,New York, NY
Affiliation Theory & Comp Physics / THEORY CENTER / THEORY CENTER
Funding Source Nuclear Physics (NP)
Proprietary? No
This publication conveys Technical Science Results
Document Numbers
JLAB Number: JLAB-THY-23-3937 OSTI Number: 2324573
LANL Number: Other Number: DOE/OR/23177-7226
Associated with an experiment No
Associated with EIC No
Supported by Jefferson Lab LDRD Funding No
Journal Article
Journal Name Physical Review D
Refereed No
Volume 109
Issue
Page(s) 054501
Attachments/Datasets/DOI Link
Document(s)
2309.01193.pdf (STI Document)
PhysRevD.109.054501.pdf (Accepted Manuscript)
DOI Link
Dataset(s) (none)
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