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Neutrino Charge Radius and Electromagnetic Dipole Moments via Scalar and Vector Leptoquarks by Bolaños-Carrera, A.; Guiot-Lomelí, M.; Tavares-Velasco, G. is a scholarly article available to read on EtoBox.

What is Neutrino Charge Radius and Electromagnetic Dipole Moments via Scalar and Vector Leptoquarks about?

The one-loop contribution of scalar and vector leptoquarks (LQs) to the electromagnetic properties (NEPs) of massive Dirac neutrinos is presented via an effective Lagrangian approach, with emphasis on the effective neutrino charge radius (NCR), which has never been calculated and is obtained by the background field formalism in a Yang-Mills-like scenario for gauge LQs. Analytical results for nonzero neutrino mass are presented in terms of both Feynman-parameter integrals and Passarino-Veltman scalar functions, which can be useful to obtain the NEPs of heavy neutrinos, out of which approximate expressions are obtained for light neutrinos. For the numerical analysis we concentrate on the only renormalizable scalar and vector LQ representations that do not need extra symmetries to forbid tree-level proton decay. Constraints on the parameter space consistent with current experimental data are then discussed and it is found that the LQ representations $\widetilde{R}_2$ and $U_1$ could yield the largest contributions to the NEPs provided that they have couplings to both left- and right-handed neutrinos of the order of $O(1)$. For a LQ mass of $1.5$ TeV, the magnetic dipole moment (MDM) o

Author

Bolaños-Carrera, A.; Guiot-Lomelí, M.; Tavares-Velasco, G.

Published

2023

Language

EN