M.Sc Student | Telem Ofri |
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Subject | Beyond the Standard Model: Naturalness and Flavor |
Department | Department of Physics | Supervisor | Professor Yael Shadmi |
Full Thesis text | ![]() |
In this work we present two models extending the Standard Model (SM) of the
fundamental particles and interactions. In the first part, we present a quark-
squark alignment model in which the flavor symmetry is a non-anomalous gauge
symmetry. This scenario is constrained by anomaly cancellation as well as by the
vanishing of the D-term VEV, which, in the simplest realizations, make it difficult
to achieve sufficient alignment of the quark and squark masses. We present a new
mechanism that circumvents this problem, in which the flavor gauge symmetry
is broken by three or more spurions satisfying the D-term cancellation condition.
This multi-spurion framework provides theoretically motivated and experimentally
viable flavor textures for the squark sector, including stop-scharm mixing and large
A-terms in Flavored Gauge Mediation. In the second part of this work we present
the first realization of the twin Higgs model as a holographic composite Higgs
model. The Higgs potential is protected by a new SM-singlet elementary “mirror”
sector at the sigma-model scale f , as opposed to the scale of composite states
m KK , naturally allowing for m KK beyond the reach of the LHC. As a result,
naturalness in this model cannot be constrained by the LHC, but may be probed
by precision Higgs measurements at future lepton colliders, or by direct searches
for KK excitations at a 100 TeV collider.