Jul 1 – 27, 2013
Nordita, Stockholm
Europe/Stockholm timezone

Chiral-symmetric strongly coupled sectors at the LHC

Jul 2, 2013, 11:00 AM
1h
132:028 (Nordita, Stockholm)

132:028

Nordita, Stockholm

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.

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