Precision Calculations for the T-Odd Quark Pair Production at the CLIC e+e- Linear Collider |
| |
Authors: | A B Mahfoudh GUO Lei LIU Wen MA Wen-Gan ZHANG Ren-You ZHANG Wen-Juan |
| |
Institution: | Department of Modern Physics, University of Science and Technology of China (USTC), Hefei 230026, China |
| |
Abstract: | We perform the precision calculations for the e+e-→q_q_(q_q_=u_u_, c_c_, d_d_,s_s_) processes up to the QCD next-to-leading order (NLO) including full weak decays for the final T-odd mirror quarks in the littlest Higgs model with T-parity (LHT) at the Compact Linear Collider (CLIC). We show the dependence of the leading order (LO) and NLO QCD corrected cross sections on the colliding energy √s, and provide the LO and QCD NLO kinematic distributions of final particles. The results show that the LO cross section can be enhanced by the NLO QCD correction and the K-factor increases obviously when the threshold of the on-shell q_q_-pair production approaches the colliding energy √s. The K-factor value varies in the range of 1.04 ~ 1.41 in our chosen parameter space. We find that a simple approximation of multiplying the LO kinematic distribution with the integrated K-factor is not appropriate for precision study of the e+e-→q_q_(q_q_=u_u_, c_c_, d_d_,s_s_) processes, since the NLO QCD corrections are phase space dependent. It is necessary to calculate the differential cross sections including full NLO QCD corrections to get reliable results. |
| |
Keywords: | littlest Higgs model with T-parity compact linear collider NLO QCD |
|
| 点击此处可从《理论物理通讯》浏览原始摘要信息 |
| 点击此处可从《理论物理通讯》下载免费的PDF全文 |
|