Beyond standard model with neutrinos

Shorttitle

One of the outstanding problems in Particle Physics
is the origin of neutrino masses and mixings. The
neutrino mixing was observed atmospheric, solar ,
reactor and accelerator neutrino oscillation data
which imply that they have a non zero mass. The
simplest way to introduce a neutrino masses is to
postulate a right-handed fermion , singlet under
standard model gauge group that mixes with the
standard model fermion via a Dirac mass term.
However, to generate a a sub-electron volt neutrino
mass , it is necessary to fine tune the
corresponding Yukawa coupling to more than one part
of a billion. We propose a model to generate a
small neutrino masses at the TeV scale. In this
model, the smallness of neutrino mass is not due to
the largness of the right handed neutrino mass, but
instead it is due to the smallness of the Dirac mass
term which is induced at one loop level. We also
discuss some ideas beyond four dimensions and the
origin of matter anti-matter asymmetry in the
universe

Autorentext

Dr Salah Nasri received his PhD with distinction in 2003 from Syracuse university , then, he took a postdoc positions at the university of Maryland (2003-2006) and the Institute of Fundamnetal Theory (IFT) at the university of Florida (2007). In 2007 he joined United Arab Emirates University as assistant professor of Physics.

Klappentext

ShorttitleOne of the outstanding problems in Particle Physics is the origin of neutrino masses and mixings. The neutrino mixing was observed atmospheric, solar , reactor and accelerator neutrino oscillation data which imply that they have a non zero mass. The simplest way to introduce a neutrino masses is to postulate a right-handed fermion , singlet under standard model gauge group that mixes with the standard model fermion via a Dirac mass term. However, to generate a a sub-electron volt neutrino mass , it is necessary to fine tune the corresponding Yukawa coupling to more than one part of a billion. We propose a model to generate a small neutrino masses at the TeV scale. In this model, the smallness of neutrino mass is not due to the largness of the right handed neutrino mass, but instead it is due to the smallness of the Dirac mass term which is induced at one loop level. We also discuss some ideas beyond four dimensions and the origin of matter anti-matter asymmetry in the universe