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Constraining new physics models from μ → e observables in bottom-up EFT
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DOI：10.1140/epjc/s10052-024-12782-x.png)
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摘要
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Upcoming experiments will improve the sensitivity to mu -> e processes by several orders of magnitude, and could observe lepton flavour-changing contact interactions for the first time. In this paper, we investigate what could be learned about New Physics from the measurements of these mu -> e observables, using a bottom-up effective field theory (EFT) approach and focusing on three popular models with new particles around the TeV scale (the type II seesaw, the inverse seesaw and a scalar leptoquark). We showed in a previous publication that mu -> e observables have the ability to rule out these models because none can fill the whole experimentally accessible parameter space. In this work we give more details on our EFT formalism and present more complete results. We discuss the impact of some observables complementary to mu -> e transitions (such as the neutrino mass scale and ordering, and LFV tau decays) and draw attention to the interesting appearance of Jarlskog-like invariants in our expressions for the low-energy Wilson coefficients.
Keyword:
LEPTON-FLAVOR VIOLATION
SPIN-DEPENDENT MU
NEUTRINO-MASS
E CONVERSION
HIGGS TRIPLET
DECAYS
SEARCH
TAU
NONCONSERVATION
PHENOMENOLOGY
期刊
IF:
4.8
论文数:
1.8W
被引数:
4.7W
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