July 31, 2017 to August 4, 2017
Fermi National Accelerator Laboratory
US/Central timezone

Dimension 7 neutrino mass generation and its implications for the LHC and the dark matter

Aug 2, 2017, 11:39 AM
18m
Ramsey Auditorium (Fermi National Accelerator Laboratory)

Ramsey Auditorium

Fermi National Accelerator Laboratory

Presentation Neutrino Physics Neutrino Physics

Speaker

Prof. Satyanarayan Nandi (Oklahoma State University)

Description

Neutrino mass generation by the effective dimension seven operators leads to a different seesaw relation, m_nu ~ v^3 / M^2 compared to the usual seesaw one, m_nu ~ v^2 / M. The model [1] incorporating this has an isospin 3/2 scalar multiplet along with iso-triplet leptons, both of which can be at the TeV scale. The model can accommodate the neutrino masses and mixings, and both the direct and indirect mass hierarchy. The isospin 3/2 scalar contains triply charged scalar particles, and can be produced at the LHC via the Drell-Yan as well as photon fusion. Depending on the induced VEV of the isospin 3/2, the triply charged scalar can decay immediately, or produce displaced vertex. The final states give rise to same sign di-leptons, as well as tri-leptons, and can be observed at the LHC in the current or upcoming runs [2]. The model also has interesting implications for the dark matter detection experiments [3]. 1. New mechanism for neutrino mass generation, and triply charged Higgs boson at the LHC, K. S. Babu, S. Nandi and Z. Tavartkiladze: Phys. Rev. D80:071702, 2009. 2. Neutrino mass and scalar singlet dark matter, S. Bhattacharya, S. Jana, S. Nandi, e-Print arXiv: 1609.03274[hep-ph], Phys. Rev. D 95(2017) no5, 055003. 3. Neutrino mass generation at the TeV scale and new physics signatures from the charged Higgs for photon initiated processes, Kirtiman Ghosh, Sudip Jana and S. Nandi, e-Print: arXiv: 1705.01121[hep-ph].

Primary author

Prof. Satyanarayan Nandi (Oklahoma State University)

Co-authors

K.S. Babu (Oklahoma State University) Kirtiman Ghosh (Institute of physics, Bhubaneswar, India) Sudip Jana (Oklahoma State University) Zurab Tavartkiladze (Ilia State University)

Presentation materials