Emerging lattice approach to the K-unitarity triangle

Lehner, Christoph; Lunghi, Enrico; Soni, Amarjit

doi:10.1016/j.physletb.2016.04.064

Title: Emerging lattice approach to the K-unitarity triangle

Abstract

In this study, it has been clear for the past several years that new physics in the quark sector can only appear, in low energy observables, as a perturbation. Therefore precise theoretical predictions and precise experimental measurements have become mandatory. Here we draw attention to the significant advances that have been made in lattice QCD simulations in recent years in K→ππ, in the long-distance contribution to indirect CP violation in the Kaon system (ε) and in rare K-decays. Thus, in conjunction with experiments, the construction of a unitarity triangle purely from Kaon physics should soon become feasible. We want to emphasize that in our approach to the K -unitarity triangle, the ability of lattice QCD methods to systematically improve the calculation of the direct CP-violation parameter (ε') plays a pivotal role. Along with the B-unitarity triangle, this could allow, depending on the pattern of new physics, for more stringent tests of the Standard Model and tighter constraints on new physics.

Authors:

Lehner, Christoph;

; Soni, Amarjit

Publication Date:: 2016-08-01

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

OSTI Identifier:: 1251265

Alternate Identifier(s):: OSTI ID: 1346745

Report Number(s):: BNL-113556-2017-JA
Journal ID: ISSN 0370-2693; S0370269316301460; PII: S0370269316301460

Grant/Contract Number:: AC-02-98CH10886(BNL); SC0010120; SC00112704

Resource Type:: Published Article

Journal Name:: Physics Letters B

Additional Journal Information:: Journal Name: Physics Letters B Journal Volume: 759 Journal Issue: C; Journal ID: ISSN 0370-2693

Publisher:: Elsevier

Country of Publication:: Netherlands

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; HET; lattice; K-unitarity; quark; perturbation

Citation Formats


                    Lehner, Christoph, Lunghi, Enrico, and Soni, Amarjit. Emerging lattice approach to the K-unitarity triangle.  Netherlands: N. p., 2016. 
Web.  doi:10.1016/j.physletb.2016.04.064.

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                    Lehner, Christoph, Lunghi, Enrico, & Soni, Amarjit. Emerging lattice approach to the K-unitarity triangle.  Netherlands.  https://doi.org/10.1016/j.physletb.2016.04.064

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                    Lehner, Christoph, Lunghi, Enrico, and Soni, Amarjit. Mon .  
"Emerging lattice approach to the K-unitarity triangle".  Netherlands.  https://doi.org/10.1016/j.physletb.2016.04.064.

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@article{osti_1251265,

  title        = {Emerging lattice approach to the K-unitarity triangle},

  author       = {Lehner, Christoph and Lunghi, Enrico and Soni, Amarjit},

  abstractNote = {In this study, it has been clear for the past several years that new physics in the quark sector can only appear, in low energy observables, as a perturbation. Therefore precise theoretical predictions and precise experimental measurements have become mandatory. Here we draw attention to the significant advances that have been made in lattice QCD simulations in recent years in K→ππ, in the long-distance contribution to indirect CP violation in the Kaon system (ε) and in rare K-decays. Thus, in conjunction with experiments, the construction of a unitarity triangle purely from Kaon physics should soon become feasible. We want to emphasize that in our approach to the K -unitarity triangle, the ability of lattice QCD methods to systematically improve the calculation of the direct CP-violation parameter (ε') plays a pivotal role. Along with the B-unitarity triangle, this could allow, depending on the pattern of new physics, for more stringent tests of the Standard Model and tighter constraints on new physics.},

  doi          = {10.1016/j.physletb.2016.04.064},

  journal      = {Physics Letters B},

  number       = C,

  volume       = 759,

  place        = {Netherlands},

  year         = {2016},

  month        = {8}

}

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Works referencing / citing this record:

Direct CP violation in ${K^0\to\pi\pi}$ : Standard Model Status
journal, June 2018

Gisbert, Héctor; Pich, Antonio
Reports on Progress in Physics, Vol. 81, Issue 7
DOI: 10.1088/1361-6633/aac18e

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Title: Emerging lattice approach to the K-unitarity triangle

Abstract

Citation Formats

Direct CP violation in ${K^0\to\pi\pi}$ : Standard Model Status journal, June 2018

Direct CP violation in ${K^0\to\pi\pi}$ : Standard Model Status
journal, June 2018