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Dark Matter and Neutrino Masses in a 2HDM-U(1) Model
Téssio MeloPh.D. student - IIP/UFPB
Dark Universe WorkshopSão Paulo, Brazil - October 21-25, 2019
based on J. High Energ. Phys. (2017) 2017: 92, with D. Cogollo, M. Lindner, Farinaldo Queiroz, W. Rodejohannand on Phys. Lett. B (2019) 795, 319-326, with D. Camargo, M. Campos, F. Queiroz
2HDMs
Téssio Melo-IIP/UFPB
● Supersymmetry requires two Higgs doublets● CP violation Baryogenesis● Dark matter● Axion● ...
Popular extensions of the SM
Dark Universe Workshop, ICTP-SAIFR, São Paulo, Oct 21-25,2019
2HDMs
Téssio Melo-IIP/UFPB
Flavor Changing Neutral Currents (FCNC) Loop suppressed in SM
Dark Universe Workshop, ICTP-SAIFR, São Paulo, Oct 21-25,2019
FCNC processes very suppressed experimentally
Example: K - K oscillation
2HDMs
Téssio Melo-IIP/UFPB
Flavor Changing Neutral Currents (FCNC) Loop suppressed in SM
Oscillation at tree levelIn models with extra neutral scalars
Dark Universe Workshop, ICTP-SAIFR, São Paulo, Oct 21-25,2019
FCNC processes very suppressed experimentally
Example: K - K oscillation
2HDMs
Téssio Melo-IIP/UFPB
Flavor Changing Neutral Currents (FCNC) Loop suppressed in SM
Oscillation at tree levelIn models with extra neutral scalars
Dark Universe Workshop, ICTP-SAIFR, São Paulo, Oct 21-25,2019
FCNC processes very suppressed experimentally
Example: K - K oscillation
Problem
2HDMs
Téssio Melo-IIP/UFPB
Usual solution to FCNC problem: Z2 symmetry
There are 4 possibilities
Dark Universe Workshop, ICTP-SAIFR, São Paulo, Oct 21-25,2019
Scalar Potential
Téssio Melo-IIP/UFPB
Dark Universe Workshop, ICTP-SAIFR, São Paulo, Oct 21-25,2019
Explicit breaking of Z2
Scalar Potential
Téssio Melo-IIP/UFPB
Dark Universe Workshop, ICTP-SAIFR, São Paulo, Oct 21-25,2019
Domain Wall Problem
2HDM - U(1)
A more appealing solution to the FCNC problem is to use a U(1) gauge symmetry
Basic requirement: scalar doublets have different U(1) charges
Téssio Melo-IIP/UFPB
Dark Universe Workshop, ICTP-SAIFR, São Paulo, Oct 21-25,2019
Gauge Anomalies
Téssio Melo-IIP/UFPB
2HDM - U(1)
Dark Universe Workshop, ICTP-SAIFR, São Paulo, Oct 21-25,2019
Gauge Anomalies
Téssio Melo-IIP/UFPB
2HDM - U(1)
Dark Universe Workshop, ICTP-SAIFR, São Paulo, Oct 21-25,2019
Three RH-neutrinos
Type I seesaw
Dark matter
Vectorlike fermion charged under U(1)
Téssio Melo-IIP/UFPB
Dark Universe Workshop, ICTP-SAIFR, São Paulo, Oct 21-25,2019
Dark matter
Vectorlike fermion charged under U(1)
Téssio Melo-IIP/UFPB
Dark Universe Workshop, ICTP-SAIFR, São Paulo, Oct 21-25,2019
Thermal production
Dark matter
Téssio Melo-IIP/UFPB
Dark Universe Workshop, ICTP-SAIFR, São Paulo, Oct 21-25,2019
Conclusion
We have presented a version of the 2HDM which is more appealing than the usual one and very rich phenomenologically
Neutrino masses and dark matter are addressed
The models survives the current constraints and future experiments will probe a large portion of its parameter space
Téssio Melo-IIP/UFPB
Dark Universe Workshop, ICTP-SAIFR, São Paulo, Oct 21-25,2019
Thanks!
