Lepton flavor-violating transitions in effective field theory and gluonic operators

Petrov, Alexey A.; Zhuridov, Dmitry

doi:10.1103/physrevd.89.033005

Cited by 31 publications

(34 citation statements)

References 50 publications

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“…Non-standard interactions (NSI) [107] apperar in several appealing SM extensions [108] involving four-fermion contact interaction, various seesaw realizations [109][110][111], left-right symmetry [112], gluonic operators [113], etc., constituting an interesting model independent probe of new physics. NSIs may have implications to SN [114], neutrino oscillations [57] and CEνNS [70,115], while recently NSI terms were explored in the context of GNI [116] and effective field theory (EFT) operators [117,118].…”

Section: B Nonstandard and Generalized Neutrino Interactionsmentioning

confidence: 99%

Recent Probes of Standard and Non-standard Neutrino Physics With Nuclei

2019

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We review standard and non-standard neutrino physics probes that are based on nuclear measurements. We pay special attention on the discussion of prospects to extract new physics at prominent rare event measurements looking for neutrino-nucleus scattering, such as the coherent elastic neutrino-nucleus scattering (CEνNS) that may involve lepton flavor violation (LFV) in neutralcurrents (NC). For the latter processes several appreciably sensitive experiments are currently pursued or have been planed to operate in the near future, like the COHERENT, CONUS, CONNIE, MINER, TEXONO, RED100, vGEN, Ricochet, NUCLEUS etc. We provide a thorough discussion on phenomenological and theoretical studies, in particular those referring to the nuclear physics aspects in order to provide accurate predictions for the relevant experiments. Motivated by the recent discovery of CEνNS at the COHERENT experiment and the active experimental efforts for a new measurement at reactor-based experiments, we summarize the current status of the constraints as well as the future sensitivities on nuclear and electroweak physics parameters, non-standard interactions, electromagnetic neutrino properties, sterile neutrinos and simplified scenarios with novel vector Z or scalar φ mediators. Indirect and direct connections of CEνNS with astrophysics, direct Dark Matter detection and charge lepton flavor violating processes are also discussed.

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Section: B Nonstandard and Generalized Neutrino Interactionsmentioning

confidence: 99%

Recent Probes of Standard and Non-standard Neutrino Physics With Nuclei

2019

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“…It is a general feature that quark sector influences even pure leptonic processes if the required accuracy is high enough, e.g. [10].…”

Section: Introductionmentioning

confidence: 99%

Inclusive weak decays of heavy hadrons with power suppressed terms at NLO

2015

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Within the heavy quark expansion techniques for the heavy hadron weak decays we analytically compute the coefficient of the power suppressed dimension five chromo-magnetic operator at next-to-leading order of QCD perturbation theory with the full dependence on the final state quark mass. We present explicit expressions for the total width of inclusive semileptonic decays including the power suppressed terms and for a few moments of decay differential distributions.One of the important phenomenological applications of our results is precision analysis of the decays of bottom mesons to charmed final states and extraction of the numerical value for the CKM matrix entry |V cb |.

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“…In semileptonic τ → ππ decays on the other hand, the pion invariant mass spectrum offers an alternative tool to separate different NP contributions. In most of the previous works treating these decays, the determination of the scalar and gluonic hadronic matrix elements has been based on leadingorder Chiral Perturbation Theory (ChPT) predictions [11,19,41,45]. The problem in such a description lies in the fact that the invariant mass of the pion pair in these decays can be relatively large √ s < m τ − m , while ChPT is only reliable at very low energies (well below the ρ mass).…”

Section: Introductionmentioning

confidence: 99%

“…Phenomenological analyses of LFV τ -decays within a generic EFT framework have also discussed the discrimination of NP scenarios by comparing the decay rates in different τ -decay modes [10,[41][42][43][44][45][46]. More information can be gathered by studying in detail the differential distributions in three-body decays.…”

Section: Introductionmentioning

confidence: 99%

Model-discriminating power of lepton flavor violatingτdecays

2014

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Within an effective field theory framework, we discuss the possibility to discriminate among different operators that contribute to lepton flavor violating (LFV) τ decays. Correlations among decay rates in different channels are shown to provide a basic handle to unravel the origin of LFV in these processes. More information about the underlying dynamics responsible for LFV can be gathered from differential distributions in three-body decays like τ → µππ or τ → 3µ: these are considered in some detail. We incorporate in our analysis recent developments in the determination of the hadronic form factors for τ → µππ. Future prospects for the observation of LFV τ decays and its interpretation are also discussed. *

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Lepton flavor-violating transitions in effective field theory and gluonic operators

Cited by 31 publications

References 50 publications

Recent Probes of Standard and Non-standard Neutrino Physics With Nuclei

Recent Probes of Standard and Non-standard Neutrino Physics With Nuclei

Inclusive weak decays of heavy hadrons with power suppressed terms at NLO

Model-discriminating power of lepton flavor violatingτdecays

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