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Master formula for $\varepsilon'/\varepsilon$ beyond the Standard Model

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arxiv 1807.02520 v3 pith:5HT5ZXRX submitted 2018-07-06 hep-ph hep-exhep-lat

Jason Aebischer , Christoph Bobeth , Andrzej J. Buras , Jean-Marc Gérard , David M. Straub This is my paper · ORCID
classification hep-phhep-exhep-lat
keywords varepsilonformulaoperatorsbeyondmastermodelstandardanomaly
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abstract

We present for the first time a master formula for $\varepsilon'/\varepsilon$, the ratio probing direct CP violation in $K \to \pi\pi$ decays, valid in any theory beyond 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 $\varepsilon'/\varepsilon$ anomaly. We have implemented the results in the open source code flavio.

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Cited by 1 Pith paper

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  1. Correlating $\epsilon^\prime/\epsilon$ to hadronic $B$ decays via $U(2)^3$ flavour symmetry

    hep-ph 2019-09 conditional novelty 6.0 of 10

    A U(2)^3 flavour-symmetric effective field theory can consistently explain the epsilon'/epsilon anomaly and hadronic B decay CP asymmetries, with a global fit about 3 sigma better than the Standard Model.

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