GeV-scale neutrinos: interactions with mesons and DUNE sensitivity

Coloma, Pilar; Fernández-Martínez, Enrique; González-López, Manuel; Hernández-García, Josu; Pavlovic, Zarko

doi:10.1140/epjc/s10052-021-08861-y

Title: GeV-scale neutrinos: interactions with mesons and DUNE sensitivity

Journal Article · Mon Jan 25 00:00:00 EST 2021 · European Physical Journal. C, Particles and Fields

DOI:https://doi.org/10.1140/epjc/s10052-021-08861-y· OSTI ID:1657474

Coloma, Pilar ^[1]; Fernández-Martínez, Enrique ^[2]; González-López, Manuel ^[2];

^[3]; Pavlovic, Zarko ^[4]

Univ. de Valencia (Spain); Univ. Autonoma de Madrid (Spain)
Univ. Autonoma de Madrid (Spain)
ELTE Eotvos Lorand Univ., Budapest (Hungary)
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

The simplest extension of the SM to account for the observed neutrino masses and mixings is the addition of at least two singlet fermions (or right-handed neutrinos). If their masses lie at or below the GeV scale, such new fermions would be produced in meson decays. Similarly, provided they are sufficiently heavy, their decay channels may involve mesons in the final state. Although the couplings between mesons and heavy neutrinos have been computed previously, significant discrepancies can be found in the literature. The aim of this paper is to clarify such discrepancies and provide consistent expressions for all relevant effective operators involving mesons with masses up to 2 GeV. Moreover, the effective Lagrangians obtained for both the Dirac and Majorana scenarios are made publicly available as FeynRules models so that fully differential event distributions can be easily simulated. As an application of our setup, we numerically compute the expected sensitivity of the DUNE near detector to these heavy neutral leptons.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); Spanish MICINN

Grant/Contract Number:: AC02-07CH11359; RYC2018-024240-I; PROMETEO/2019/083

OSTI ID:: 1657474

Report Number(s):: FERMILAB-PUB-20-269-ND; oai:inspirehep.net:1805773; TRN: US2203268

Journal Information:: European Physical Journal. C, Particles and Fields, Vol. 81, Issue 1; ISSN 1434-6044

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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