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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 |
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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)
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DOI Link | |
Dataset(s) | (none) |
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