2021
DOI: 10.48550/arxiv.2104.11162
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Polarization and Correlation Effects in Lepton Flavor Violated Decays Induced by Axion-Like Particle

Abstract: Lepton flavor violated process are strongly suppressed in the Standard Model due to very small neutrino mass, but can be sizable in some extended models. The current experimental bounds on decay modes ± → a ± are much weaker than other flavor violated processes because of the huge irreducible backgrounds → ν ν . In this paper, we give the full helicity density matrix of both the signal and backgrounds, and then study polarization effects. Particularly, we treat inclusively the two missing neutrinos in the back… Show more

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Cited by 6 publications
(6 citation statements)
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References 82 publications
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“…Section 4 is dedicated to an analysis of flavor-violating ALP couplings to leptons, which have also received a lot of attention in recent years [50][51][52][67][68][69][70][71][72], and provides an update to our work of ref. [73].…”
Section: Jhep09(2022)056mentioning
confidence: 99%
“…Section 4 is dedicated to an analysis of flavor-violating ALP couplings to leptons, which have also received a lot of attention in recent years [50][51][52][67][68][69][70][71][72], and provides an update to our work of ref. [73].…”
Section: Jhep09(2022)056mentioning
confidence: 99%
“…Charged-lepton flavor violation (CLFV) is currently attracting a lot of attention [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27], since its discovery would undoubtedly imply physics beyond the SM, enabling us to probe new physics at extremely high energy scales, such as Oð10 8 Þ GeV by μ → eγ [13] and Oð10 9 Þ GeV by μ → ea, where a is a pseudo-Nambu-Goldstone boson like an axion or familon [22,28]. Anomalies and hints of lepton flavor universality violation in observables such as rare B meson decays [29][30][31] (see also Refs.…”
mentioning
confidence: 99%
“…The flavor-violating ALP effective Lagrangian we will adopt for this analysis has been previously considered in refs. [7,8,13,[22][23][24][25][26][27]. It is given by…”
Section: Alp Effective Field Theorymentioning
confidence: 99%