26-30 July 2021
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Europe/Berlin timezone

Neutrino Masses and Hubble Tension via a Majoron in MFV

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20m
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Poster Neutrino Physics T04: Neutrino Physics

Speaker

Manuel González López (Universidad Autónoma de Madrid)

Description

The recent tension between local and early measurements of the Hubble constant can be explained in a particle physics context. A mechanism is presented where this tension is alleviated due to the presence of a Majoron, arising from the spontaneous breaking of Lepton Number. The lightness of the active neutrinos is consistently explained. Moreover, this mechanism is shown to be embeddable in the Minimal (Lepton) Flavour Violating context, providing a correct description of fermion masses and mixings, and protecting the flavour sector from large deviations from the Standard Model predictions. A QCD axion is also present to solve the Strong CP problem. The Lepton Number and the Peccei-Quinn symmetries naturally arise in the Minimal (Lepton) Flavour Violating setup and their spontaneous breaking is due to the presence of two extra scalar singlets. The Majoron phenomenology is also studied in detail. Decays of the heavy neutrinos and the invisible Higgs decay provide the strongest constraints in the model parameter space.

Email manuel.gonzalezl@uam.es
Collaboration / Activity Universidad Autónoma de Madrid
First author Manuel González López

Primary author

Manuel González López (Universidad Autónoma de Madrid)

Co-authors

Enrique Fernández-Martínez (Universidad Autónoma de Madrid) Fernando Arias-Aragón (Universidad Autónoma de Madrid) Luca Merlo (Universidad Autónoma de Madrid)

Presentation Materials