Master formula for ε                         ′                         /ε beyond the Standard Model

Jason Aebischer; Christoph Bobeth; Andrzej J. Buras; Jean Marc Gérard; David M. Straub

doi:10.1016/j.physletb.2019.04.016

Master formula for ε ^′ /ε beyond the Standard Model

Jason Aebischer, Christoph Bobeth, Andrzej J. Buras, Jean Marc Gérard, David M. Straub

Chair of Theoretical Elementary Particle Physics

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

We present for the first time a master formula for ε ^′ /ε, the ratio probing direct CP violation in K→ππ decays, valid in any ultraviolet extension of the Standard Model (BSM). The formula makes use of hadronic matrix elements of BSM operators calculated recently in the Dual QCD approach and the ones of the SM operators from lattice QCD. We emphasize the large impact of several scalar and tensor BSM operators in the context of the emerging ε ^′ /ε anomaly. We have implemented the results in the open source code flavio.

Original language	English
Pages (from-to)	465-469
Number of pages	5
Journal	Physics Letters B
Volume	792
DOIs	https://doi.org/10.1016/j.physletb.2019.04.016
State	Published - 10 May 2019

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abstract = " We present for the first time a master formula for ε ′ /ε, the ratio probing direct CP violation in K→ππ decays, valid in any ultraviolet extension of the Standard Model (BSM). The formula makes use of hadronic matrix elements of BSM operators calculated recently in the Dual QCD approach and the ones of the SM operators from lattice QCD. We emphasize the large impact of several scalar and tensor BSM operators in the context of the emerging ε ′ /ε anomaly. We have implemented the results in the open source code flavio.",

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AU - Aebischer, Jason

AU - Bobeth, Christoph

AU - Buras, Andrzej J.

AU - Gérard, Jean Marc

AU - Straub, David M.

PY - 2019/5/10

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N2 - We present for the first time a master formula for ε ′ /ε, the ratio probing direct CP violation in K→ππ decays, valid in any ultraviolet extension of the Standard Model (BSM). The formula makes use of hadronic matrix elements of BSM operators calculated recently in the Dual QCD approach and the ones of the SM operators from lattice QCD. We emphasize the large impact of several scalar and tensor BSM operators in the context of the emerging ε ′ /ε anomaly. We have implemented the results in the open source code flavio.

AB - We present for the first time a master formula for ε ′ /ε, the ratio probing direct CP violation in K→ππ decays, valid in any ultraviolet extension of the Standard Model (BSM). The formula makes use of hadronic matrix elements of BSM operators calculated recently in the Dual QCD approach and the ones of the SM operators from lattice QCD. We emphasize the large impact of several scalar and tensor BSM operators in the context of the emerging ε ′ /ε anomaly. We have implemented the results in the open source code flavio.

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DO - 10.1016/j.physletb.2019.04.016

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SN - 0370-2693

VL - 792

SP - 465

EP - 469

JO - Physics Letters B

JF - Physics Letters B

ER -

Master formula for ε ^′ /ε beyond the Standard Model

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