From Dark-Sectors to the Axion-Neutrino Connection
Henrique Brito Câmara
Departamento de Física and CFTP Instituto Superior Técnico, Universidade de Lisboa
Abstrakt: In this seminar I will discuss how dark-sectors and the axion-neutrino connection can be the key in addressing the open problems in particle and astroparticle physics.
In the first part of the talk I will focus on the dark linear seesaw (Phys.Lett.B 843 (2023) 138012). We propose a novel neutrino mass generation framework where a dark sector, containing viable WIMP dark matter candidates, generates small lepton number violating parameters triggering the low-scale linear seesaw mechanism. We study the phenomenology regarding scalar dark matter and charged-lepton flavor-violation.
The second half of the presentation is about axion frameworks with color-mediated neutrino masses (Phys.Rev.Lett. 132 (2024) 5, 051801 and arXiV: 2 501.13156 [hep-ph]). We propose a KSVZ-type axion framework in which vector-like quarks and colored scalars generate Majorana and Dirac neutrino masses radiatively. The axion also accounts for the observed cosmological dark matter. The framework predicts distinct axion-to-photon couplings, testable through haloscope and helioscope experiments, as well as potentially significant flavor-violating quark-axion interactions.
Seminář se koná v úterý 11. března ve 14:00
v zasedací místnosti ÚTEF ČVUT, Praha 1, Husova 240/5.
| Ing. Bartoloměj Biskup, Ph.D. tajemník semináře |
doc. Ing. Ivan Štekl, CSc. ředitel ÚTEF |
doc. Dr. André Sopczak předseda NPS, ČS IEEE |
NUCLEAR & PLASMA SCIENCES SOCIETY CHAPTER
IEEE Czechoslovakia section
https://www.ieee.cz/main/section/nps/