^{1}

^{1}

^{2}

^{3}

^{1}

^{2}

^{3}

^{3}.

We study the single top production in association with a Higgs boson in the

In July 2012, a Higgs-like resonance with mass

It is well known that the SM cannot be the final theory of nature. Theoretically, successful explanation of some problems, such as the hierarchy problem, requires new physics beyond the SM near the TeV scale. Experimentally, the solid evidence for neutrino oscillation is one of the firm hints for new physics. The minimal extension of the SM that we consider in this paper is that the SM gauge groups are augmented by a

The Yukawa couplings play an important role in probing the new physics since they are sensitive to new flavor dynamics. The top quark is the heaviest particle discovered and owns the strongest Yukawa coupling. The top quark Yukawa coupling is speculated to be sensitive to the electroweak symmetry breaking (EWSB) mechanism and new physics. The

The

The paper is structured as follows. In Section

The minimal

The Lagrangian for Yang-Mills and fermionic sectors is given by

In this model, the most general gauge-invariant and renormalizable scalar Lagrangian can be expressed as

From the mass terms in the scalar potential, the mass matrix between the two Higgs bosons in the basis

To complete the discussion on the Lagrangian, we write down the Yukawa term, which in addition to the SM terms has interactions involving the right-handed neutrinos

In terms of the mixing angle

For the single top and Higgs associated production, the three processes of interest are characterized by the virtuality of the

Lowest-order Feynman diagrams for

Lowest-order Feynman diagrams for

Lowest-order Feynman diagrams for

We compute the cross sections by using

In our calculations, the relevant

In Figure

The production cross sections

In Figures

The production cross sections

The production cross sections

The

Feynman diagrams for signal

We generate the signal and background events with

Due to the small signal cross section, this process has a low signal-to-background ratio

The normalized distributions of

Firstly, we impose the cut

After that, we apply the invariant mass of the four-lepton system to further isolate the signal and let

The cut-flow cross sections of the signal and background for 14 TeV LHC are summarized in Table

Cutflow of the cross sections for the signal and backgrounds at 14 TeV LHC on the benchmark point (

Cuts | | | | | |
---|---|---|---|---|---|

Signal | Background | 3000 fb^{−1} | % | ||

| | ||||

No cuts | 34.3 | 103.9 | 1.84 | 0.33 | |

Basic cuts | 15.6 | 50.2 | 1.20 | 0.31 | 45.5 |

| 11.3 | 19.5 | 1.40 | 0.58 | 72.4 |

| 2.97 | 1.04 | 1.60 | 2.86 | 26.3 |

In the minimal

The authors declare that they have no competing interests.

This work was supported by the National Natural Science Foundation of China (NNSFC) under Grant no. 11405047, the Startup Foundation for Doctors of Henan Normal University under Grant no. qd15207, the Joint Funds of the National Natural Science Foundation of China (U1404113), the Education Department Foundation of Henan Province (14A140010), the Aid Project for the Mainstay Young Teachers in Henan Provincial Institutions of Higher Education of China (2014GGJS-283), and colleges and universities in Henan province key scientific research project for 2016 (16B140002).

^{−1}of