The CP-violating effects to the subprocess gg→H+H-are studied in the mSUGRA scenario at the CERN large hadron collider,by taking into account the experimental bounds of electron and neutron electric dipole moments.Th...The CP-violating effects to the subprocess gg→H+H-are studied in the mSUGRA scenario at the CERN large hadron collider,by taking into account the experimental bounds of electron and neutron electric dipole moments.The CP-violating effects in this process are related to the complex phases ofμand Af in the mSUGRA scenario.In our calculation we consider smallCP phases ofμand Af and neglect the effects of neutral Higgs boson mixing.In this case the CP effects to the process mainly come from the complex couplings of Higgs-squark-squark.We find a strong dependence of charged Higgs boson pair production rate on the complex couplings in the parameter space of minimal supersymmetric standard model.展开更多
The left-right twin Higgs （LRTH） model predicts the existence of three additional Higgs bosons： one neutral Higgs φo and a pair of charged Higgs bosons φ±. In this paper, we study two pair production process...The left-right twin Higgs （LRTH） model predicts the existence of three additional Higgs bosons： one neutral Higgs φo and a pair of charged Higgs bosons φ±. In this paper, we study two pair production processes of these new particles at the next generation eγ colliders, i.e., e-γ → e-φ＋φ- , and e-γ→vRφ-φ0. We find that the production cross section of the process e-γ → e-φ＋φ- are at the level of several tens fb, the production cross section of the process e-γ→vRφ-φ0 can reach 0.35 fb with the reasonable parameter values. As long as the charged Higgs bosons are not too heavy, we conclude that these processes might be used to test for the left-right twin Higgs model in future high-energy linear collider experiments.展开更多
The Higgs triplet model （HTM） predicts the existence of a pair of doubly charged Higgs bosons H±±. Single production of H±± via e7 collision at the next generation e＋ e- International Linear Col...The Higgs triplet model （HTM） predicts the existence of a pair of doubly charged Higgs bosons H±±. Single production of H±± via e7 collision at the next generation e＋ e- International Linear Collider （ILC） and the Large Hadron electron Collider （LHeC） is considered. The numerical results show that the production cross sections are very sensitive to the neutrino oscillation parameters. Their values for the inverted hierarchy mass spectrum are larger than those for the normal hierarchy mass spectrum at these two kinds of collider experiments. With reasonable values of the relevant free parameters, the possible signals of the doubly charged Higgs bosons predicted by the HTM might be detected in future ILC experiments.展开更多
Abstract In the context of the left-right twin Higgs （LRTH） model, we have studied the charged Higgs bosons production processes e＋e-（γγ） →tbФ- at the International Linear Collider （ILC）. It is found that t...Abstract In the context of the left-right twin Higgs （LRTH） model, we have studied the charged Higgs bosons production processes e＋e-（γγ） →tbФ- at the International Linear Collider （ILC）. It is found that the cross sections of these two processes could reach a few Fo with reasonable parameter values. With the yearly integrated luminosity of L 500 fb-1 expected at the ILC, one could collect hundreds up to thousands of charged ttiggs events via these two processes. Therefore, our researches in this paper can help us search for charged Higgs bosons, and furthermore, to test the LRTH model.展开更多
We investigate in detail the charged Higgs production associated with a W boson at electron-positron colliders within the framework of the Type-I two-Higgs-doublet model(THDM).We calculate the integrated cross section...We investigate in detail the charged Higgs production associated with a W boson at electron-positron colliders within the framework of the Type-I two-Higgs-doublet model(THDM).We calculate the integrated cross section at the LO and analyze the dependence of the cross section on the THDM parameters and the colliding energy in a benchmark scenario of the input parameters of the Higgs sector.The numerical results show that the integrated cross section is sensitive to the charged Higgs mass,especially in the vicinity of mH±≃184 GeV at a 500 GeV e^+e^−collider,and decreases consistently with the increase of tanβin the low tanβregion.The peak in the colliding energy distribution of the cross section arises from the resonance of the loop integrals,and it moves towards the low colliding energy with the increase of mH±.We also study the two-loop NLO QCD corrections to both the integrated cross section and the angular distribution of the charged Higgs boson and find that the QCD relative correction is also sensitive to the charged Higgs mass and strongly depends on the final-state phase space.For tanβ=2,the QCD relative correction at a 500 GeV e^+e^−collider varies in the range of[-10%,11%]as mH±increases from 150 to 400 GeV.展开更多
基金The project supporled in part by National Natural Science Foundation of China(19875049)a grant from the Education Ministry of China and the State Comnission of Science and Technology of China and the Youth Science Foundation of the University of Science and Techoology of China
文摘The CP-violating effects to the subprocess gg→H+H-are studied in the mSUGRA scenario at the CERN large hadron collider,by taking into account the experimental bounds of electron and neutron electric dipole moments.The CP-violating effects in this process are related to the complex phases ofμand Af in the mSUGRA scenario.In our calculation we consider smallCP phases ofμand Af and neglect the effects of neutral Higgs boson mixing.In this case the CP effects to the process mainly come from the complex couplings of Higgs-squark-squark.We find a strong dependence of charged Higgs boson pair production rate on the complex couplings in the parameter space of minimal supersymmetric standard model.
基金Supported in Part by the National Natural Science Foundation of China under Grant No.10775039 the Foundation of He'nan Educational Committee under Grant No.2009B140003
文摘The left-right twin Higgs （LRTH） model predicts the existence of three additional Higgs bosons： one neutral Higgs φo and a pair of charged Higgs bosons φ±. In this paper, we study two pair production processes of these new particles at the next generation eγ colliders, i.e., e-γ → e-φ＋φ- , and e-γ→vRφ-φ0. We find that the production cross section of the process e-γ → e-φ＋φ- are at the level of several tens fb, the production cross section of the process e-γ→vRφ-φ0 can reach 0.35 fb with the reasonable parameter values. As long as the charged Higgs bosons are not too heavy, we conclude that these processes might be used to test for the left-right twin Higgs model in future high-energy linear collider experiments.
基金Supported by the National Natural Science Foundation of China under Grant No.10975067the Specialized Research Fund for the Doctoral Program of Higher Education(SRFDP) under Grant No.200801650002
文摘The Higgs triplet model （HTM） predicts the existence of a pair of doubly charged Higgs bosons H±±. Single production of H±± via e7 collision at the next generation e＋ e- International Linear Collider （ILC） and the Large Hadron electron Collider （LHeC） is considered. The numerical results show that the production cross sections are very sensitive to the neutrino oscillation parameters. Their values for the inverted hierarchy mass spectrum are larger than those for the normal hierarchy mass spectrum at these two kinds of collider experiments. With reasonable values of the relevant free parameters, the possible signals of the doubly charged Higgs bosons predicted by the HTM might be detected in future ILC experiments.
基金Supported by the Scientific Research Key Project of the Education Department of Henan under Grant Nos.13A140113 and 12A140011Zhoukou Shizhuan Boshi Chuangxin under Grant No.20121039
文摘Abstract In the context of the left-right twin Higgs （LRTH） model, we have studied the charged Higgs bosons production processes e＋e-（γγ） →tbФ- at the International Linear Collider （ILC）. It is found that the cross sections of these two processes could reach a few Fo with reasonable parameter values. With the yearly integrated luminosity of L 500 fb-1 expected at the ILC, one could collect hundreds up to thousands of charged ttiggs events via these two processes. Therefore, our researches in this paper can help us search for charged Higgs bosons, and furthermore, to test the LRTH model.
基金Supported in part by the National Natural Science Foundation of China(11775211,11535002)the CAS Center for Excellence in Particle Physics(CCEPP)。
文摘We investigate in detail the charged Higgs production associated with a W boson at electron-positron colliders within the framework of the Type-I two-Higgs-doublet model(THDM).We calculate the integrated cross section at the LO and analyze the dependence of the cross section on the THDM parameters and the colliding energy in a benchmark scenario of the input parameters of the Higgs sector.The numerical results show that the integrated cross section is sensitive to the charged Higgs mass,especially in the vicinity of mH±≃184 GeV at a 500 GeV e^+e^−collider,and decreases consistently with the increase of tanβin the low tanβregion.The peak in the colliding energy distribution of the cross section arises from the resonance of the loop integrals,and it moves towards the low colliding energy with the increase of mH±.We also study the two-loop NLO QCD corrections to both the integrated cross section and the angular distribution of the charged Higgs boson and find that the QCD relative correction is also sensitive to the charged Higgs mass and strongly depends on the final-state phase space.For tanβ=2,the QCD relative correction at a 500 GeV e^+e^−collider varies in the range of[-10%,11%]as mH±increases from 150 to 400 GeV.
