A light supersymmetric Higgs sector hidden by a standard model-like Higgs

作者：Delgado Antonio^*; Nardini Germano; Quiros Mariano

来源：The Journal of High Energy Physics, 2013, 2013(7): 054.

DOI：10.1007/JHEP07(2013)054

• Supersymmetry Phenomenology

Extending the Higgs sector of the MSSM by triplets alleviates the little hierarchy problem and naturally allows for enhancements in the diphoton decay rate of the lightest CP-even Higgs h. In the present paper we analyze in detail the Higgs phenomenology of this theory with m(h) similar or equal to 126GeV. We mostly focus on a light Higgs sector where the pseudoscalar A, the next-to-lightest CP-even scalar H and the charged H-+/- Higgses are naturally at the electroweak scale. It turns out that for any value m(A) greater than or similar to m(h) there is a parameter region at small tan beta where the CP-even Higgs sector appears at colliders as the SM one, except for loop-induced corrections. Notably the existence of this SM-like point, which is absent in the MSSM, is shared with supersymmetric theories where there are extra singlets. We also highlight a second parameter region at small m A and small tan beta where the h signal strengths, diphoton channel included, are SM-like except those of bottoms and taus which can have at most a 10-15% splitting. Improvements in the A and H-+/- searches are worthwhile in order to discriminate this scenario from the SM.

• 出版日期2013-7