Status report on ϵk with lattice QCD inputs

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

Status report on ϵ_k with lattice QCD inputs

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

Integrated Sciences and Engineering Division

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

Abstract

We report the current status of ϵ_K, the indirect CP violation parameter in the neutral kaon system, evaluated using the lattice QCD inputs. We use lattice QCD to fix B_K, ξ₀, ξ₂, |V_us|, m_c(m_c), and |V_cb|. Since Lattice 2015, FLAG updated BK, exclusive Vcb has been updated with new lattice data in the B →Dℓν decay channel, and RBC-UKQCD has updated ξ₀ and ξ₂. Our preliminary results show that the standard model evaluation of ϵ_K with exclusive |V_cb| (lattice QCD inputs) has 3:2σ tension with the experimental value, while that of ϵ_K with inclusive jVcbj (heavy quark expansion) shows no tension.

Original language	English
Journal	Proceedings of Science
Volume	Part F128557
Publication status	Published - 2016
Event	34th Annual International Symposium on Lattice Field Theory, LATTICE 2016 - Southampton, United Kingdom Duration: 2016 Jul 24 → 2016 Jul 30

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title = "Status report on ϵk with lattice QCD inputs",

abstract = "We report the current status of ϵK, the indirect CP violation parameter in the neutral kaon system, evaluated using the lattice QCD inputs. We use lattice QCD to fix BK, ξ0, ξ2, |Vus|, mc(mc), and |Vcb|. Since Lattice 2015, FLAG updated BK, exclusive Vcb has been updated with new lattice data in the B →Dℓν decay channel, and RBC-UKQCD has updated ξ0 and ξ2. Our preliminary results show that the standard model evaluation of ϵK with exclusive |Vcb| (lattice QCD inputs) has 3:2σ tension with the experimental value, while that of ϵK with inclusive jVcbj (heavy quark expansion) shows no tension.",

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

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s).; 34th Annual International Symposium on Lattice Field Theory, LATTICE 2016 ; Conference date: 24-07-2016 Through 30-07-2016",

year = "2016",

language = "English",

volume = "Part F128557",

journal = "Proceedings of Science",

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TY - JOUR

T1 - Status report on ϵk with lattice QCD inputs

AU - Bailey, Jon A.

AU - Lee, Weonjong

AU - Leem, Jaehoon

AU - Park, Sungwoo

AU - Jang, Yong Chull

PY - 2016

Y1 - 2016

N2 - We report the current status of ϵK, the indirect CP violation parameter in the neutral kaon system, evaluated using the lattice QCD inputs. We use lattice QCD to fix BK, ξ0, ξ2, |Vus|, mc(mc), and |Vcb|. Since Lattice 2015, FLAG updated BK, exclusive Vcb has been updated with new lattice data in the B →Dℓν decay channel, and RBC-UKQCD has updated ξ0 and ξ2. Our preliminary results show that the standard model evaluation of ϵK with exclusive |Vcb| (lattice QCD inputs) has 3:2σ tension with the experimental value, while that of ϵK with inclusive jVcbj (heavy quark expansion) shows no tension.

AB - We report the current status of ϵK, the indirect CP violation parameter in the neutral kaon system, evaluated using the lattice QCD inputs. We use lattice QCD to fix BK, ξ0, ξ2, |Vus|, mc(mc), and |Vcb|. Since Lattice 2015, FLAG updated BK, exclusive Vcb has been updated with new lattice data in the B →Dℓν decay channel, and RBC-UKQCD has updated ξ0 and ξ2. Our preliminary results show that the standard model evaluation of ϵK with exclusive |Vcb| (lattice QCD inputs) has 3:2σ tension with the experimental value, while that of ϵK with inclusive jVcbj (heavy quark expansion) shows no tension.

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M3 - Conference article

AN - SCOPUS:85025814982

SN - 1824-8039

VL - Part F128557

JO - Proceedings of Science

JF - Proceedings of Science

T2 - 34th Annual International Symposium on Lattice Field Theory, LATTICE 2016

Y2 - 24 July 2016 through 30 July 2016

ER -

Status report on ϵ_k with lattice QCD inputs

Abstract

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