Search

We modify the implementation of T-parity in the fermion sector (called LHT-III), where the mixing of top quark and T-even partner can be absent, and the Higgs mass quadratic divergence contributed by the top quark and a T-odd partner cancel each other. Besides, the Yukawa couplings of down-type quarks and leptons can be enhanced in this model, while these couplings are suppressed in other little Higgs models. Finally, we study the channel $VV\to h\to\tau\bar{\tau}$ at LHC in several typical little Higgs models, and find that the rate in all these little Higgs models can have a sizable deviation from the SM prediction, especially for that the rate can only be enhanced in LHT-III, but suppressed in other little Higgs models. Therefore, the Higgs production process $VV\to h\to\tau\bar{\tau}$ at LHC can provide a powerful way to probe these little Higgs models, especially for distinguishing the LHT-III from other little Higgs models. [ABSTRACT FROM AUTHOR]

Abstract: In the framework of the left–right twin Higgs (LRTH) model, we study the production of a pair of SM-like Higgs bosons at the LHC (Higgs mass is typical in the range of 160–180 GeV). First, we examine the production rate and find that it can be significantly larger than the SM prediction. Then we investigate the decays of the Higgs-pair and find that in some parameter space the new decay mode ( is a candidate for WIMP dark matter) can be important, which can suppress sizably the conventional decay modes like , and . Finally, we study the promising channel and find that the rate can be sizably enhanced or suppressed compared with the SM prediction. [ABSTRACT FROM AUTHOR]

Abstract: In the framework of the simplest little Higgs model (SLHM), we study the production of a pair of neutral CP-even Higgs bosons at the LHC. First, we examine the production rate and find that it can be significantly larger than the SM prediction. Then we investigate the decays of the Higgs-pair and find that for a low Higgs mass their dominant decay mode is (η is a CP-odd scalar) while and may also have sizable ratios. Finally, we comparatively study the rates of , , and in the SLHM and the littlest Higgs models (LHT). We find that for a light Higgs, compared with the SM predictions, all the three rates can be sizably enhanced in the LHT but severely suppressed in the SLHM; while for an intermediately heavy Higgs, both the LHT and SLHM can enhance sizably the SM predictions. [Copyright &y& Elsevier]