Abstract
We consider a particular composite Higgs model which contains SU(3) color octet top partners besides the usually considered triplet representations. Moreover, color singlet top partners are present as well which can in principle serve as dark matter candidates. We investigate the LHC phenomenology of these unusual top partners. Some of these states could be confused with gluinos predicted in supersymmetric models at first glance.
Highlights
Color singlet top partners are present as well which can in principle serve as dark matter candidates
While the first incarnations, inspired by Quantum Chromo Dynamics (QCD), were essentially Higgsless [5–7], it was later realized that a SM-like limit could be achieved by extending the global symmetry of the condensing theory to allow for a misaligned vacuum [8]
They are predicted to be among the lightest top partners, they play the leading role in the LHC phenomenology of this model
Summary
We consider an Sp(2Nc) hyper-color gauge theory with 5 Weyl fermions ψi in the antisymmetric and 6 Weyl fermions χj in the fundamental representation as an underlying model of the composite sector. Needed to assign the correct hypercharge to the composite colored states: the SM hypercharge is defined as Y = TR3 + X, where TR3 is the diagonal generator of a global SU(2)R subgroup of SO(5) in the EW coset. In terms of SU(3)c, the 14 degrees of freedom decompose into a color octet π8 and a complex color triplet π3, where π8 has charge 0 with respect to the U(1)X subgroup and the triplet 2/3 As these are SU(2)L singlets, these numbers correspond automatically to their hypercharges and to their electric charges. We note for completeness that one has in addition a decay constant fψ in the electroweak sector beside fχ One expects that both have the same size.
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