Searches for Heavy Neutral Lepton Decays in the MicroBooNE Detector

Lepton-pair production in dipion τ lepton decays

Physical Review D ◽

10.1103/physrevd.103.014027 ◽

2021 ◽

Vol 103 (1) ◽

Author(s):

J. L. Gutiérrez Santiago ◽

G. López Castro ◽

P. Roig

Keyword(s):

Pair Production ◽

Lepton Pair ◽

Lepton Pair Production ◽

Lepton Decays

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SOLAR NEUTRINOS WITH EXOTIC SCATTERING

Modern Physics Letters A ◽

10.1142/s0217732393000994 ◽

1993 ◽

Vol 08 (14) ◽

pp. 1273-1284 ◽

Cited By ~ 2

Author(s):

JOÃO PULIDO

Keyword(s):

Elastic Scattering ◽

Solar Neutrino ◽

Solar Neutrinos ◽

The Sun ◽

Neutral Currents ◽

Neutrino Scattering ◽

Flavor Changing ◽

Lepton Decays ◽

Neutrino Experiments ◽

Vacuum Mixing

The possibility of unconventional neutrino scattering in the Sun via flavor changing neutral currents as a possible source of the solar neutrino deficit is investigated. If the effect is really significant, a resonant process will occur. Taking into account the neutrino deficit reported by the solar neutrino experiments (Kamiokande II, SAGE Gallex), one finds Δ2m21 = (0.6–1.4) × 10−5 eV 2 with no vacuum mixing and 0.16 ≤ fex ≤ 0.34 where fex is the lepton violating coupling. Our understanding of the neutrino phenomenon in the Sun may be improved through accuracy improvements in experiments measuring νee− elastic scattering or others searching for exotic lepton decays.

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A note on searches for an intermediate-mass neutral lepton

Soviet Physics Journal ◽

10.1007/bf00952577 ◽

1976 ◽

Vol 19 (5) ◽

pp. 655-657

Author(s):

�. M. Lipmanov

Keyword(s):

Intermediate Mass ◽

Neutral Lepton

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Review of accelerator-based searches for Neutral Long-Lived Particles

Revista de la Academia Colombiana de Ciencias Exactas Físicas y Naturales ◽

10.18257/raccefyn.915 ◽

2019 ◽

Vol 43 (169) ◽

pp. 638-645

Author(s):

Marta Losada

Keyword(s):

Parameter Space ◽

Coupling Strength ◽

Current Status ◽

Next Generation ◽

Fixed Target ◽

Beam Dump ◽

Basic Formalism ◽

Neutral Lepton

In this paper we present the current status of searches for neutral long-lived particles. The basic formalism that allows the determination of the number of expected long-lived particles is presented. Heavy neutral leptons can be a type of long-lived particles. The main observational motivations for the existence of heavy neutral lepton is covered as well. A summary of the main results from both collider searches and fixed target/beam dump experiments is presented. The outlook for next generation experiments and their impact on the parameter space of coupling strength and mass of heavy neutral leptons is also discussed.

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Non-standard interactions in $\tau^- \to (\pi^-\eta,\pi^-\pi^0)\nu_{\tau}$ decays

10.21468/scipostphysproc.1.008 ◽

2019 ◽

Author(s):

Gabriel Lopez Castro

Keyword(s):

Weak Interactions ◽

High Energy ◽

New Physics ◽

Tau Lepton ◽

Tau Decays ◽

Set Constraints ◽

Belle Ii ◽

Lepton Decays ◽

Energy Processes ◽

New Interactions

Originally thought as clean processes to study the hadronization of the weak currents, semileptonic tau lepton decays can be useful to set constraints on non-standard (NS) weak interactions. We study the effects of new interactions in \tau^- \to (\pi^-\eta,\pi^-\pi^0)\nu_{\tau}τ−→(π−η,π−π0)ντ decays and find that they are sensitive probes of these New Physics effects in the form of scalar and tensor interactions, respectively. Further improved measurements at Belle II will set limits on these scalar interactions that are similar to other low and high energy processes.

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