https://doi.org/10.1140/epjc/s10052-014-3203-x
Regular Article - Theoretical Physics
Double Higgs production in the littlest Higgs model with T-parity at high energy $$e^{+}e^{-}$$ colliders
1
College of Physics and Electronic Engineering, Henan Normal University, Xinxiang, 453007, China
2
School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454000, China
3
Department of Physics and Electronic Engineering, Zhoukou Normal University, Zhoukou, 466001, Henan, China
* e-mail: yangbingfang@gmail.com
Received:
19
August
2014
Accepted:
27
November
2014
Published online:
11
December
2014
In the framework of the littlest Higgs model with T-parity (LHT), we investigate the double Higgs production processes $$e^{+}e^{-}\rightarrow ZHH$$ and $$e^{+}e^{-}\rightarrow \nu \bar{\nu }HH$$ at high energy $$e^{+}e^{-}$$ colliders. We calculate the production cross sections and find that the relative correction at the center-of-mass energy $$\sqrt{s}=500$$ GeV can maximally reach $$-30\,\%$$ for the process $$e^{+}e^{-}\rightarrow ZHH$$ and $$-16\,\%$$ for the process $$e^{+}e^{-}\rightarrow \nu \bar{\nu }HH$$ in the allowed parameter space, respectively. These large relative corrections can reach the detection range of the future $$e^{+}e^{-}$$ colliders so that they can be used to test the LHT effect. The two relevant decay modes $$e^{+}e^{-}$$ $$\rightarrow ZHH \rightarrow l\bar{l} b\bar{b}b\bar{b}$$ and $$e^{+}e^{-}\rightarrow \nu \bar{\nu }HH\rightarrow \nu \bar{\nu }b\bar{b}b\bar{b}$$ are studied and some distributions of the signal and background are displayed.
© SIF and Springer-Verlag Berlin Heidelberg, 2014
