Deppisch, F;
Bolton, P;
(2019)
Probing Non-Standard Lepton Number Violating Interactions in Neutrino Oscillations.
Physical Review D
, 99
, Article 115011. 10.1103/PhysRevD.99.115011.
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Abstract
We discuss lepton number violating processes in the context of long-baseline neutrino oscillations. We summarise and compare neutrino flavour oscillations in quantum mechanics and quantum field theory, both for standard oscillations and those that violate lepton number. When the active neutrinos are Majorana in nature, the required helicity-reversal gives a strong suppression by the neutrino mass over the energy, (mν/Eν) 2 . Instead, the presence of non-standard lepton number violating interactions incorporating right-handed lepton currents at production or detection alleviate the mass suppression while also factorising the oscillation probability from the total rate. Such interactions arise from dimension-six operators in the low energy effective field theory of the Standard Model. We derive general and simplified expressions for the lepton number violating oscillation probabilities and use limits from MINOS and KamLAND to place bounds on the interaction strength in interplay with the unknown Majorana phases in neutrino mixing. We compare the bounds with those from neutrinoless double beta decay and other microscopic lepton number violating processes and outline the requirements for future short- and long-baseline neutrino oscillation experiments to improve on the existing bounds.
| Type: | Article |
|---|---|
| Title: | Probing Non-Standard Lepton Number Violating Interactions in Neutrino Oscillations |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevD.99.115011 |
| Publisher version: | https://doi.org/10.1103/PhysRevD.99.115011 |
| Language: | English |
| Additional information: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10074899 |
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