Friday, July 19, 2013

1307.4778 (James Barnard et al.)

Radiative corrections to the composite Higgs mass from a gluon partner    [PDF]

James Barnard, Tony Gherghetta, Anibal Medina, Tirtha Sankar Ray
In composite Higgs models light fermionic top partners often play an important role in obtaining a 126 GeV Higgs mass. The presence of these top partners implies that coloured vector mesons, or massive gluon partners, most likely exist. Since the coupling between the top partners and gluon partners can be large there are then sizeable one-loop contributions to the composite Higgs mass. We compute the radiative correction to the Higgs mass from a gluon partner in the minimal composite Higgs model and show that the Higgs mass is in fact reduced. This allows the top partner masses to be increased, easing the tension between having a light composite Higgs and heavy top partners.
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