Global bounds on the Type-III Seesaw
EntityUAM. Departamento de Física Teórica
10.1007/JHEP05(2020)022Journal of High Energy Physics 2020.5 (2020): 22
ISSN1029-8479 (online); 1126-6708 (print)
Funded byThis work is supported in part by the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreements 674896-Elusives and 690575-InvisiblesPlus. EFM acknowledges support from the “Spanish Agencia Estatal de Investigación” (AEI) and the EU “Fondo Europeo de Desarrollo Regional” (FEDER) through the project FPA2016-78645-P; and the Spanish MINECO through the Centro de Excelencia Severo Ochoa Program under grant SEV-2016-0597. JHG acknowledges support by the grant K125105 of the National Research, Development and Innovation Fund in Hungary. JLP acknowledges support by the “Generalitat Valenciana” (Spain) through the “plan GenT” program (CIDEGENT/2018/019)
ProjectGobierno de España. FPA2016-78645-P; Gobierno de España. SEV-2016-0597; info:eu-repo/grantAgreement/EC/H2020/674896/EU//ELUSIVES; info:eu-repo/grantAgreement/EC/H2020/690575/EU//InvisiblesPlus
SubjectsBeyond Standard Model; Neutrino Physics; Física
Rights© 2020, The Author(s)
Esta obra está bajo una Licencia Creative Commons Atribución 4.0 Internacional.
We derive general bounds on the Type-III Seesaw parameters from a global fit to flavor and electroweak precision data. We explore and compare three Type-III Seesaw realizations: a general scenario, where an arbitrary number of heavy triplets is integrated out without any further assumption, and the more constrained cases in which only 3 or 2 (minimal scenario) additional heavy states are included. The latter assumption implies rather non-trivial correlations in the Yukawa flavor structure of the model so as to reproduce the neutrino masses and mixings as measured in neutrino oscillations experiments and thus qualitative differences can be found with the more general scenario. In particular, we find that, while the bounds on most elements of the dimension 6 operator coefficients are of order 10−4 for the general and 3-triplet cases, the 2-triplet scenario is more strongly constrained with bounds between 10−5 and 10−7 for the different flavours. We also discuss how these correlations affect the present CMS constraints on the Type-III Seesaw in the minimal 2-triplet scenario
Google Scholar:Biggio, Carla - Fernández Martínez, L. Enrique - Filaci, Manuele - Hernandez-Garcia, Josu - Lopez-Pavon, Jacobo
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