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1. chinaXiv:201606.00337 [pdf]

Probing the CP-even Higgs sector via H-3 -> H2H1 in the natural next-to-minimal supersymmetric standard modelg

Kang, Zhaofeng; Li, Jinmian; Li, Tianjun; Liu, Da; Shu, Jing
Subjects: Physics >> The Physics of Elementary Particles and Fields

After the discovery of a standard model (SM)-like Higgs boson, naturalness strongly favors the next-to-minimal supersymmetric SM. In this letter, we point out that the natural next-to-minimal supersymmetric SM usually predicts the following CP-even Higgs H-i sector: (A) H-2 is the SM-like Higgs boson with mass pushed upward by a lighter H-1 with mass overwhelmingly within [m(H2)/2, m(H2)]; (B) m(H3) similar or equal to 2 mu/sin 2 beta greater than or similar to 300 GeV; (C) H-3 has a significant coupling to the top quark and can decay to H1H2 with a large branching ratio. Using a jet substructure we show that these three Higgs bosons can be discovered via gg -> H-3 -> H1H2 -> b (b) over barl nu jj at the 14 TeV LHC. In particular, the LEP-LHC scenario with H-1 similar or equal to 98 GeV has a very good discovery potential.

submitted time 2016-06-28 Hits2358Downloads1044 Comment 0

2. chinaXiv:201606.00330 [pdf]

Towards the fate of natural composite Higgs model through single t ' search at the 8 TeV LHC

Li, Jinmian; Liu, Da; Shu, Jing
Subjects: Physics >> The Physics of Elementary Particles and Fields

We analyze the observational potential of single t' production in both the t' -> bW and t' -> th decay channels at 8 TeV LHC using an integrated luminosity of 25 fb(-1). Our analysis is based on a simplified model with minimal coset SO(5)/SO(4) in which the t' is a singlet of the unbroken SO(4). The single t' production, as a consequence of electroweak symmetry breaking, is less kinematically suppressed, associated with a light forward jet and has boosted decay products at the 8 TeV LHC. Therefore it provides the most promising channel in searching for a heavy t'. We have exploited the above kinematical features and used the jet substructure method to reconstruct the boosted Higgs in th decay channel. It is shown that a strong constraint on the t'bW coupling (g(t'bW)/g(tbW,SM) < 0.2 similar to 0.3) at the 95% C. L. can be obtained for m(t') subset of (700, 1000) GeV.

submitted time 2016-06-27 Hits2077Downloads1080 Comment 0

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