Probe the Electroweak Phase Transition at the LHC

24 Aug 2015, 17:30
Lake ()


Higgs Theory and Experiment Higgs Expt., Theory and Phenomenology


Peisi Huang (University of Chicago/Argonne National Lab)


We study the correlation between the Higgs trilinear coupling and the nature of Electroweak Phase Transition. We use two examples to illustrate this correlations -- a simplified model where we include higher order terms in the effective potential, and the NMSSM. We find a large deviation in the trilinear coupling from its Standard Model value in a theory that exhibits a strong first order Electroweak Phase Transition. Then we study how to probe the trilinear coupling from the double Higgs production at the LHC. We develop a new approach to probe the values of the trilinear coupling that have a large deviation from its Standard Model value. At LHC 14 TeV, with a integrated luminosity of 3ab^-1, we expect a 3.3sigma significance for the Standard Model value of the trilinear coupling and a 5sigma significance for a trilinear coupling lambda_3 = 6.5lambda_3^{SM} for the bbgammagamma channel.

Primary authors

Aniket Joglekar (The University of Chicago) Bing Li (University of Chicago) Carlos E.M. Wagner (University of Chicago) Peisi Huang (University of Chicago/Argonne National Lab)

Presentation Materials