Current status of ϵK calculated with lattice QCD inputs

Jon A. Bailey; Yong Chull Jang; Weonjong Lee

Current status of ϵ_K calculated with lattice QCD inputs

Jon A. Bailey, Yong Chull Jang, Weonjong Lee

Integrated Sciences and Engineering Division

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

Abstract

We present results for ϵ_k, the indirect CP violation parameter, calculated in the Standard Model using inputs from lattice QCD: the kaon bag parameter B_k, and the CKM matrix element V_cb from the axial current form factor for the exclusive decay B → D^∗lv at zero-recoil. In addition, we take the coordinates of the unitarity triangle apex (p, η) from the angle-only fit of the UTfit Collaboration and use V_us to fix λ. In order to estimate the systematic error, we also use Wolfenstein parameters from the CKMfitter and UTfit. We find a 3.3(2)σ difference between ψ_k and experiment with exclusive V_cb. We report details of this preliminary result.

Original language	English
Article number	371
Journal	Proceedings of Science
Volume	Part F130500
Publication status	Published - 2014
Event	32nd International Symposium on Lattice Field Theory, LATTICE 2014 - New York, United States Duration: 2014 Jun 23 → 2014 Jun 28

Bibliographical note

Funding Information:
The research of W. Lee is supported by the Creative Research Initiatives Program (No. 2014001852) of the NRF grant funded by the Korean government (MEST). W. Lee would like to acknowledge the support from KISTI supercomputing center through the strategic support program for the supercomputing application research [No. KSC-2013-G2-005]. Computations were carried out on the DAVID GPU clusters at Seoul National University. 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. 2014027937).

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© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.

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Cite this

@article{81a293d45aad404cb76d6b80e3508990,

title = "Current status of ϵK calculated with lattice QCD inputs",

abstract = "We present results for ϵk, the indirect CP violation parameter, calculated in the Standard Model using inputs from lattice QCD: the kaon bag parameter Bk, and the CKM matrix element Vcb from the axial current form factor for the exclusive decay B → D∗lv at zero-recoil. In addition, we take the coordinates of the unitarity triangle apex (p, η) from the angle-only fit of the UTfit Collaboration and use Vus to fix λ. In order to estimate the systematic error, we also use Wolfenstein parameters from the CKMfitter and UTfit. We find a 3.3(2)σ difference between ψk and experiment with exclusive Vcb. We report details of this preliminary result.",

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

note = "Funding Information: The research of W. Lee is supported by the Creative Research Initiatives Program (No. 2014001852) of the NRF grant funded by the Korean government (MEST). W. Lee would like to acknowledge the support from KISTI supercomputing center through the strategic support program for the supercomputing application research [No. KSC-2013-G2-005]. Computations were carried out on the DAVID GPU clusters at Seoul National University. 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. 2014027937). Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.; 32nd International Symposium on Lattice Field Theory, LATTICE 2014 ; Conference date: 23-06-2014 Through 28-06-2014",

year = "2014",

language = "English",

volume = "Part F130500",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab Srl",

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TY - JOUR

T1 - Current status of ϵK calculated with lattice QCD inputs

AU - Bailey, Jon A.

AU - Jang, Yong Chull

AU - Lee, Weonjong

N1 - Funding Information: The research of W. Lee is supported by the Creative Research Initiatives Program (No. 2014001852) of the NRF grant funded by the Korean government (MEST). W. Lee would like to acknowledge the support from KISTI supercomputing center through the strategic support program for the supercomputing application research [No. KSC-2013-G2-005]. Computations were carried out on the DAVID GPU clusters at Seoul National University. 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. 2014027937). Publisher Copyright: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.

PY - 2014

Y1 - 2014

N2 - We present results for ϵk, the indirect CP violation parameter, calculated in the Standard Model using inputs from lattice QCD: the kaon bag parameter Bk, and the CKM matrix element Vcb from the axial current form factor for the exclusive decay B → D∗lv at zero-recoil. In addition, we take the coordinates of the unitarity triangle apex (p, η) from the angle-only fit of the UTfit Collaboration and use Vus to fix λ. In order to estimate the systematic error, we also use Wolfenstein parameters from the CKMfitter and UTfit. We find a 3.3(2)σ difference between ψk and experiment with exclusive Vcb. We report details of this preliminary result.

AB - We present results for ϵk, the indirect CP violation parameter, calculated in the Standard Model using inputs from lattice QCD: the kaon bag parameter Bk, and the CKM matrix element Vcb from the axial current form factor for the exclusive decay B → D∗lv at zero-recoil. In addition, we take the coordinates of the unitarity triangle apex (p, η) from the angle-only fit of the UTfit Collaboration and use Vus to fix λ. In order to estimate the systematic error, we also use Wolfenstein parameters from the CKMfitter and UTfit. We find a 3.3(2)σ difference between ψk and experiment with exclusive Vcb. We report details of this preliminary result.

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M3 - Conference article

AN - SCOPUS:85030096109

SN - 1824-8039

VL - Part F130500

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 371

T2 - 32nd International Symposium on Lattice Field Theory, LATTICE 2014

Y2 - 23 June 2014 through 28 June 2014

ER -

Current status of ϵ_K calculated with lattice QCD inputs

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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