A composite Higgs boson of 125 GeV mass, only mildly fine-tuned, requires top partners with a semi-perturbative coupling and a mass not greater than about a TeV. We analyze the strong constraints on such picture arising from flavour and electroweak precision tests in models of partial compositeness. We consider different representations for the composite fermions and compare the case of an anarchic flavour structure to models with a U(3)3 and U(2) 3 flavour symmetry. Although non trivially, some models emerge that look capable of accommodating a 125GeV Higgs boson with top partners in an interesting mass range for discovery at the LHC as well as associated flavour signals. © 2013 SISSA, Trieste, Italy.
A 125 GeV composite Higgs boson versus flavour and electroweak precision tests / Barbieri R.; Buttazzo D.; Sala F.; Straub D.M.; Tesi A.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - ELETTRONICO. - 2013:5(2013), pp. 69.-1-69.29. [10.1007/JHEP05(2013)069]
A 125 GeV composite Higgs boson versus flavour and electroweak precision tests
Sala F.;
2013
Abstract
A composite Higgs boson of 125 GeV mass, only mildly fine-tuned, requires top partners with a semi-perturbative coupling and a mass not greater than about a TeV. We analyze the strong constraints on such picture arising from flavour and electroweak precision tests in models of partial compositeness. We consider different representations for the composite fermions and compare the case of an anarchic flavour structure to models with a U(3)3 and U(2) 3 flavour symmetry. Although non trivially, some models emerge that look capable of accommodating a 125GeV Higgs boson with top partners in an interesting mass range for discovery at the LHC as well as associated flavour signals. © 2013 SISSA, Trieste, Italy.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
