Speaker
Roman Pasechnik
(University of Lund)
Description
Most of the traditional Technicolor-based models are known to
be in a strong tension with the electroweak precision data.
We show that
this serious issue is naturally cured in strongly coupled
sectors with
chiral-symmetric vector-like gauge interactions in the
framework of gauged
linear sigma model. We discuss possible phenomenological
implications of
such non-standard chiral-symmetric Technicolor scenario in
its simplest
formulation preserving the standard Higgs mechanism. In the
conformal
limit of this scenario, the SM Higgs vev acquires natural
interpretation
in terms of the condensate of technifermions in confinement.
We study the
influence of the lowest lying composite physical states, namely,
technipions, technisigma and constituent technifermions, on
the Higgs
sector properties in the SM and other observables at the
LHC. We found out
that the predicted Higgs boson signal strengths in gamma gamma,
vector-boson VV^* and fermion ffbar decay channels can be
sensitive to the
new strongly-coupled dynamics and are consistent with the
current SM-like
Higgs boson observations in the limit of relatively small
Higgs-technisigma mixing. At the same time, the chiral-symmetric
Technicolor provides rich technipion and technisigma
phenomenology at the
LHC, and its major implications are discussed in detail.
