2018 Update on εK with lattice QCD inputs

Jon A. Bailey; Sunkyu Lee; Weonjong Lee; Yong Chull Jang; Jaehoon Leem; Sungwoo Park

2018 Update on ε_K with lattice QCD inputs

Jon A. Bailey, Sunkyu Lee, Weonjong Lee, Yong Chull Jang, Jaehoon Leem, Sungwoo Park

Integrated Sciences and Engineering Division

Research output: Contribution to journal › Conference article › peer-review

Abstract

We present updated results for ε_K determined directly from the standard model (SM) with lattice QCD inputs such as B_K, |V_cb|, |V_us|, ξ₀, ξ₂, ξ_LD, F_K, and m_c. We find that the standard model with exclusive |V_cb| and other lattice QCD inputs describes only 70% of the experimental value of |ε_K| and does not explain its remaining 30%, which leads to a strong tension in |ε_K| at the 4σ level between the SM theory and experiment. We also find that this tension disappears when we use the inclusive value of |V_cb| obtained using the heavy quark expansion based on QCD sum rules.

Original language	English
Article number	284
Journal	Proceedings of Science
Volume	334
Publication status	Published - 2018
Event	36th Annual International Symposium on Lattice Field Theory, LATTICE 2018 - East Lansing, United States Duration: 2018 Jul 22 → 2018 Jul 28

Bibliographical note

Funding Information:
of W. Lee is supported by the Creative Research Initiatives Program (No. 2017013332) of the NRF grant funded by the Korean government (MEST). J.A.B. is supported by the Basic Science Research Program of the National Research Foundation of Korea (NRF) funded by the Ministry of Education (No. 2015024974). W. Lee would like to acknowledge the support from the KISTI supercomputing center through the strategic support program for the supercomputing application research (No. KSC-2016-C3-0072). Computations were carried out on the DAVID GPU clusters at Seoul National University.

Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons.

All Science Journal Classification (ASJC) codes

General

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@article{e331a7b88e7d4f42866fe2cd3d28c25f,

title = "2018 Update on εK with lattice QCD inputs",

abstract = "We present updated results for εK determined directly from the standard model (SM) with lattice QCD inputs such as BK, |Vcb|, |Vus|, ξ0, ξ2, ξLD, FK, and mc. We find that the standard model with exclusive |Vcb| and other lattice QCD inputs describes only 70% of the experimental value of |εK| and does not explain its remaining 30%, which leads to a strong tension in |εK| at the 4σ level between the SM theory and experiment. We also find that this tension disappears when we use the inclusive value of |Vcb| obtained using the heavy quark expansion based on QCD sum rules.",

author = "Bailey, {Jon A.} and Sunkyu Lee and Weonjong Lee and Jang, {Yong Chull} and Jaehoon Leem and Sungwoo Park",

note = "Funding Information: of W. Lee is supported by the Creative Research Initiatives Program (No. 2017013332) of the NRF grant funded by the Korean government (MEST). J.A.B. is supported by the Basic Science Research Program of the National Research Foundation of Korea (NRF) funded by the Ministry of Education (No. 2015024974). W. Lee would like to acknowledge the support from the KISTI supercomputing center through the strategic support program for the supercomputing application research (No. KSC-2016-C3-0072). Computations were carried out on the DAVID GPU clusters at Seoul National University. Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons.; 36th Annual International Symposium on Lattice Field Theory, LATTICE 2018 ; Conference date: 22-07-2018 Through 28-07-2018",

year = "2018",

language = "English",

volume = "334",

journal = "Proceedings of Science",

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T1 - 2018 Update on εK with lattice QCD inputs

AU - Bailey, Jon A.

AU - Lee, Sunkyu

AU - Lee, Weonjong

AU - Jang, Yong Chull

AU - Leem, Jaehoon

AU - Park, Sungwoo

N1 - Funding Information: of W. Lee is supported by the Creative Research Initiatives Program (No. 2017013332) of the NRF grant funded by the Korean government (MEST). J.A.B. is supported by the Basic Science Research Program of the National Research Foundation of Korea (NRF) funded by the Ministry of Education (No. 2015024974). W. Lee would like to acknowledge the support from the KISTI supercomputing center through the strategic support program for the supercomputing application research (No. KSC-2016-C3-0072). Computations were carried out on the DAVID GPU clusters at Seoul National University. Publisher Copyright: © Copyright owned by the author(s) under the terms of the Creative Commons.

PY - 2018

Y1 - 2018

N2 - We present updated results for εK determined directly from the standard model (SM) with lattice QCD inputs such as BK, |Vcb|, |Vus|, ξ0, ξ2, ξLD, FK, and mc. We find that the standard model with exclusive |Vcb| and other lattice QCD inputs describes only 70% of the experimental value of |εK| and does not explain its remaining 30%, which leads to a strong tension in |εK| at the 4σ level between the SM theory and experiment. We also find that this tension disappears when we use the inclusive value of |Vcb| obtained using the heavy quark expansion based on QCD sum rules.

AB - We present updated results for εK determined directly from the standard model (SM) with lattice QCD inputs such as BK, |Vcb|, |Vus|, ξ0, ξ2, ξLD, FK, and mc. We find that the standard model with exclusive |Vcb| and other lattice QCD inputs describes only 70% of the experimental value of |εK| and does not explain its remaining 30%, which leads to a strong tension in |εK| at the 4σ level between the SM theory and experiment. We also find that this tension disappears when we use the inclusive value of |Vcb| obtained using the heavy quark expansion based on QCD sum rules.

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JO - Proceedings of Science

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T2 - 36th Annual International Symposium on Lattice Field Theory, LATTICE 2018

Y2 - 22 July 2018 through 28 July 2018