Abstract:
The extended color sector is an integral part of many theories with new dynamics, which attempt to address various unresolved issues of the ordinary standard model. Heavy vector color-octet models including axigluon, topcolor, technicolor with colored technifermions, flavor-universal and chiral coloron, and extra-dimensional models with KK gluons belong to this class of the beyond the standard model theories.
In this talk, I am going to discuss the minimal renormalizable extension of the standard model color sector, in which the color gauge group is enlarged to SU(3)_{1c} x SU(3)_{2c}, spontaneously broken to the diagonal SU(3)_c subgroup. The ordinary QCD is then identified with this diagonal unbroken gauge group. The formalism predicts the existence of a rich spectrum of new (colored) scalar, fermionic, and vector particles with novel properties.
In particular, I will focus on constraining this model by imposing vacuum stability, tree-level unitarity, electroweak precision measurements, LHC measurements of the 125 GeV scalar, and the LHC heavy Higgs searches. Furthermore, I will discuss the hadron collider production of the heavy vector color-octet at next-to-leading order, which allows for determining the K-factor and the p_T distribution.
