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Constraints on $2\ell 2q$ operators from $\mu - e$ flavour-changing meson decays

Abstract : We study lepton-flavor-violating two- and three-body decays of pseudoscalar mesons in effective field theory. We give analytic formulas for the decay rates in the presence of a complete basis of QED×QCD-invariant operators. The constraints are obtained at the experimental scale, then translated to the weak scale via one-loop renormalization group equations. The large renormalization-group mixing between tensor and (pseudo)scalar operators weakens the constraints on scalar and pseudoscalar operators at the weak scale.
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https://hal.archives-ouvertes.fr/hal-01861994
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Submitted on : Wednesday, June 2, 2021 - 1:35:06 PM
Last modification on : Sunday, November 27, 2022 - 5:08:41 AM
Long-term archiving on: : Friday, September 3, 2021 - 7:15:05 PM

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PhysRevD.99.015032.pdf
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Sacha Davidson, Albert Saporta. Constraints on $2\ell 2q$ operators from $\mu - e$ flavour-changing meson decays. Phys.Rev.D, 2019, 99 (1), pp.015032. ⟨10.1103/PhysRevD.99.015032⟩. ⟨hal-01861994⟩

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