publication . Conference object . Preprint . 2019

Interference effects in semileptonic decays from heavy Majorana neutrinos

Marcano, X.; Abada, A.; Hati, C.; Teixeira, A.M.;
Open Access English
  • Published: 10 Jul 2019
  • Publisher: HAL CCSD
  • Country: France
Abstract
Several beyond the Standard Model scenarios introduce new heavy neutrinos, whose Dirac or Majorana nature could be tested by comparing the rates of lepton number violating and lepton number conserving processes: a Dirac fermion induces only the latter, while a Majorana one predicts the same rate for both of them. Nevertheless, in the presence of more than one Majorana fermion, this picture may change drastically due to interference effects. We focus on lepton number violating and lepton flavour violating semileptonic meson decays induced by two heavy Majorana fermions, exploring the necessary conditions to have sizeable interference effects and discussing their ...
Persistent Identifiers
Subjects
arXiv: High Energy Physics::PhenomenologyHigh Energy Physics::ExperimentHigh Energy Physics::Lattice
free text keywords: new physics, numerical calculations, phase: CP, CP: violation, lepton number: violation, lepton: flavor: violation, interference: effect, semileptonic decay, neutrino: sterile, neutrino: Dirac, neutrino: Majorana, neutrino: heavy, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], High Energy Physics - Phenomenology
Funded by
EC| ELUSIVES
Project
ELUSIVES
The Elusives Enterprise: Asymmetries of the Invisible Universe
  • Funder: European Commission (EC)
  • Project Code: 674896
  • Funding stream: H2020 | MSCA-ITN-ETN
,
EC| InvisiblesPlus
Project
InvisiblesPlus
InvisiblesPlus
  • Funder: European Commission (EC)
  • Project Code: 690575
  • Funding stream: H2020 | MSCA-RISE

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[2] A. Abada, C. Hati, X. Marcano and A. M. Teixeira, Interference effects in LNV and LFV semileptonic decays: the Majorana hypothesis, JHEP 09 (2019) 017 [1904.05367]. [OpenAIRE]

[3] A. Abada et al., Effective Majorana mass matrix from tau and pseudoscalar meson lepton number violating decays, JHEP 02 (2018) 169 [1712.03984].

[4] A. Das, P. S. B. Dev and R. N. Mohapatra, Same Sign versus Opposite Sign Dileptons as a Probe of Low Scale Seesaw Mechanisms, Phys. Rev. D97 (2018) 015018 [1709.06553].

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