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T: Fachverband Teilchenphysik

T 77: Jenseits des Standardmodells (Theorie) 2

T 77.2: Vortrag

Mittwoch, 26. März 2014, 17:00–17:15, P6

Higher Order Corrections to the Trilinear Higgs Self-Couplings in the Real NMSSM — Dao Thi Nhung, Margarete Mühlleitner, •Juraj Streicher, and Kathrin Walz — Institut für Theoretische Physik, Karlsruher Institut für Technologie

The pursuit of future LHC analyses is the determination of the properties of the observed Higgs boson candidate. Apart from the comparison to the Standard Model (SM) predictions, it is also important to clarify whether the candidate might be a Higgs boson of an extension beyond the SM. Among these, the Next-to-Minimal Supersymmetric Extension of the SM (NMSSM) yields interesting consequences for the Higgs phenomenology due to its enlarged Higgs sector consisting of seven Higgs bosons. The knowledge of higher order corrections to the Higgs boson masses and couplings is indispensable in order to obtain theoretical predictions competing with experimental precision. The latter is mandatory to be able to distinguish between different models. After having provided the one-loop corrections to the Higgs boson masses in previous works, we now present the one-loop corrected trilinear self-couplings of Higgs bosons in the CP conserving NMSSM and discuss the impact of these corrections in some sample scenarios compatible with the current LHC data. The corrections substantially alter the decay widths of Higgs-to-Higgs decays and the cross sections of Higgs pair production in gluon fusion.