Version 10 (modified by richardphysics, 4 years ago) (diff)

Updated URLs to model files.

Richard Ruiz

### Model Description

The Type I Seesaw Model extends the Standard Model (SM) field content by introducing three right-handed neutrinos $N{i}, ~i=1,\dots,3$,

After electroweak symmetry breaking, the effective Type I Seesaw Lagrangian with one heavy Majorana neutrino $N$ is given by [ 1 ]

where { #!latex $\mathcal{L}_{\rm SM}$ } is the Standard Model Lagrangian, the heavy Majorana neutrino's kinetic and mass terms are

and its interactions with the Weak gauge and Higgs bosons in the mass eigenbasis, i.e., after mixing with active neutrinos, are given by

### Model Files

• heavyN.fr: Main model file. Relies on sm.fr (default FR model file) being declared elsewhere.
• heavyN.nb: Mathematica notebook file that loads FR and model. Allows user to run quick sanity checks (optional) and outputs UFO file.
• Seesaw_TypeI.tgz: Standalone package containing heavyN.fr, heavyN.nb, massless.rst (default FR file), diagonalCKM.rst (default FR file), and sm.fr (default FR file). To download and unpack, use the commands: