# Particle Physics Seminar

## Wednesday 1^{st} June 2016 at 13:30

Poynting Small Lecture Theatre

*(tea, coffee and biscuits served at 13:15)*
# The Search for Unification.

## Alon Faraggi (Liverpool University)

**Abstract**

The quest for unification is a prevailing theme is physics, from
Newton who unified
terrestrial and celestial mechanics, to modern day efforts to synthesize
general relativity and
quantum mechanics. I will describe contemporary work on two fronts in this
direction. The first
is the construction of phenomenological heterotic-string models and the study
of a particular
class that produced solely the spectrum of the Minimal Supersymmetric Standard
Model in
their low energy effective field theory. The second front is an attempt to
identify a fundamental
principle underlying quantum gravity, in the context of the equivalence
postulate
of quantum mechanics. The 750 GeV di-photon excess as a possible signature of a
string derived Z' model will be discussed. The presentation will be non--technical and suitable for
a general audience.