Abstract
The Scotogenic model is a popular scenario that induces radiative Majorana neutrino masses and includes a weakly-interacting dark matter candidate. We classify all possible ultraviolet extensions of the Scotogenic model in which (i) the dark ℤ2 parity emerges at low energies after the spontaneous breaking of a global U(1)L lepton number symmetry, and (ii) the low-energy effective theory contains a naturally small lepton number breaking parameter, suppressed by the mass of a heavy mediator integrated out at tree-level. We find 50 such models and discuss two of them in detail to illustrate our setup. We also discuss some general aspects of the phenomenology of the models in our classification, exploring possible lepton flavor violating signals, collider signatures and implications for dark matter. The phenomenological prospects of these scenarios are very rich due to the presence of additional scalar states, including a massless Goldstone boson.
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Acknowledgments
The authors are grateful to Julio Leite for enlightening discussions, in particular for drawing their attention to topology V. Work supported by the Spanish grants PID2020-113775GB- I00 (AEI/10.13039/501100011033) and CIPROM/2021/054 (Generalitat Valènciana). The work of PE is supported by the FPI grant PRE2018-084599. AV acknowledges financial support from MINECO through the Ramón y Cajal contract RYC2018-025795-I. DPS would like to thank the AHEP group for the hospitality during his visit. The work of DPS was supported by Ciencia de Frontera CONACYT project No. 428218 and the program “BECAS CONACYT NACIONALES”.
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Portillo-Sánchez, D., Escribano, P. & Vicente, A. Ultraviolet extensions of the Scotogenic model. J. High Energ. Phys. 2023, 23 (2023). https://doi.org/10.1007/JHEP08(2023)023
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DOI: https://doi.org/10.1007/JHEP08(2023)023