São Paulo, Brazil - October 21-25, 2019 Dark Universe ... · Dark Matter and Neutrino Masses in a...

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!