2015/04/27 by Lei Wu, Wu, Lei, Jin Min Yang +5 · 4 citations
Physics and Astronomy · #Particle physics theoretical and experimental studies #Dark Matter and Cosmic Phenomena #Particle Detector Development and Performance
paper · pdf · doi:10.48550/arxiv.1504.06932
Measuring the Higgs self-coupling is one of the crucial physics goals at the LHC Run-2 and other future colliders. In this work, we attempt to figure out the size of SUSY effects on the trilinear self-coupling of the 125 GeV Higgs boson in the MSSM and NMSSM after the LHC Run-1. Taking account of current experimental constraints, such as the Higgs data, flavor constraints, electroweak precision observables and dark matter detections, we obtain the observations: (1) In the MSSM, the ratio of λMSSM3h/λSM3h has been tightly constrained by the LHC data, which can be only slightly smaller than 1 and minimally reach 97%; (2) In the NMSSM with λ<0.7, a sizable reduction of λNMSSM3h2/λSM3h2 can occur and minimally reach 10% when the lightest CP-even Higgs boson mass mh1 is close to the SM-like Higgs boson mh2 due to the large mixing angle between the singlet and doublet Higgs bosons; (3) In the NMSSM with λ>0.7, a large enhancement or reduction -1.1