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Advances in High Energy Physics
Volume 2015, Article ID 509847, 16 pages
Research Article

Two Higgs Bosons near 125 GeV in the Complex NMSSM and the LHC Run I Data

1School of Physics & Astronomy, University of Southampton, Southampton SO17 1BJ, UK
2Asia Pacific Center for Theoretical Physics, San 31, Hyoja-dong, Nam-gu, Pohang 790-784, Republic of Korea

Received 24 April 2015; Revised 14 July 2015; Accepted 30 July 2015

Academic Editor: Mark D. Goodsell

Copyright © 2015 Stefano Moretti and Shoaib Munir. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The publication of this article was funded by SCOAP3.


We analyse the impact of explicit CP-violation in the Higgs sector of the Next-to-Minimal Supersymmetric Standard Model (NMSSM) on its consistency with the Higgs boson data from the Large Hadron Collider (LHC). Through detailed scans of the parameter space of the complex NMSSM for certain fixed values of one of its CP-violating (CPV) phases, we obtain a large number of points corresponding to five phenomenologically relevant scenarios containing ∼125 GeV Higgs boson(s). We focus, in particular, on the scenarios where the visible peaks in the experimental samples can actually be explained by two nearly mass-degenerate neutral Higgs boson states. We find that some points corresponding to these scenarios give an overall slightly improved fit to the data, more so for nonzero values of the CPV phase, compared to the scenarios containing a single Higgs boson near 125 GeV.