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T: Fachverband Teilchenphysik

T 16: Beyond the Standard Model (Theorie) 2

T 16.2: Talk

Tuesday, February 28, 2012, 17:00–17:15, VG 3.102

Higgs pair production in a Composite Higgs model and the effects of heavy fermions — Jose R. Espinosa^{1, 2}, •Ramona Grober³, Christophe Grojean^{4, 5}, Margarete Muhlleitner³, and Ennio Salvioni^{4, 6} — ¹ICREA, Institucio Catalana de Recerca i Estudis Avancats, Barcelona, Spain — ²IFAE, Univeritat Autonoma de Barcelona, Barcelona, Spain — ³Institut fuer Theoretische Physik, Karlsruhe Institute of Technology, Karlsruhe, Germany — ⁴CERN, Theoretical Physics, Geneva, Switzerland — ⁵Institut de Physique Theorique, CEA Saclay, Gif-sur-Yvette, France — ⁶Dipartimento di Fisica and INFN, Universita di Padova, Padova, Italy

In composite Higgs models the Higgs boson arises as a pseudo Nambu-Goldstone boson of an enlarged global symmetry. If the Higgs boson is a composite state of a strongly interacting sector, the large top mass can be explained by partial top compositeness which means that the top mass arises through an admixture of the top quark with states from the composite sector. For single Higgs production via gluon fusion it was shown in several papers that the masses of top partners have no effect on the cross section. We will show here that this does not hold true for Higgs pair production. There the cross section depends on the specific choice of the model parameters.