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

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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

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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 = "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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TY - JOUR

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

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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M3 - Conference article

AN - SCOPUS:85069963129

SN - 1824-8039

VL - 334

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 284

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

Y2 - 22 July 2018 through 28 July 2018

ER -

2018 Update on ε_K with lattice QCD inputs

Abstract

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