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
We calculate the complete next-to-leading order(NLO)QCD corrections to J/ψ+W associated production within the factorization formalism of nonrelativistic QCD at the 7 TeV Large Hadron Collider.We provide the numerical...We calculate the complete next-to-leading order(NLO)QCD corrections to J/ψ+W associated production within the factorization formalism of nonrelativistic QCD at the 7 TeV Large Hadron Collider.We provide the numerical results for the leading-order(LO),NLO QCD corrected differential cross sections of the J/ψtransverse momentum by adopting the event selection criteria requested by the ATLAS experiment.It is found that the differential cross section at the LO is significantly enhanced by the NLO QCD corrections.展开更多
We investigate the effects induced by the interactions of the Kaluza–Klein graviton with the standard model(SM)particles on the triple Z^(0)-boson production process at the International Linear Collider in the framew...We investigate the effects induced by the interactions of the Kaluza–Klein graviton with the standard model(SM)particles on the triple Z^(0)-boson production process at the International Linear Collider in the framework of the large extra dimension(LED)model.We present the dependence of the integrated cross sections on the electron-positron colliding energy√s,and various kinematic distributions of final Z^(0) bosons and their subsequential decay products in both the SM and the LED model.We also provide the relationship between the integrated cross section and the fundamental scale MS by taking the number of the extra dimensions(d)as 3,4,5,and 6,respectively.The numerical results show that the LED effect can induce an observable relative discrepancy for the integrated cross section(δ_(LED)).We find that the relative discrepancy of the LED effect can even reach a few dozen percent in the high transverse momentum area or the central rapidity region of the final Z^(0)-bosons and muons.展开更多
We present theoretical predictions including the complete next-to-leading order(NLO)QCD corrections to the top quark pair production in association with a photon at the LHC with the center-of-mass system energy of 7Te...We present theoretical predictions including the complete next-to-leading order(NLO)QCD corrections to the top quark pair production in association with a photon at the LHC with the center-of-mass system energy of 7TeV.The uncertainties of the leading order(LO)and NLO QCD corrected cross sections due to the renormalization/factorization scale,and the distributions of the transverse momenta of the final top quark and the photon are studied.Moreover,we provide the numerical results of the LO,NLO QCD corrected cross sections and the corresponding𝐾-factors with different photon transverse momentum cuts.We also discuss the impact of QCD corrections to the𝑝pp→tt^(ˉ)γ𝛾+X𝑋in the case that there exists an exotic top quark with an electric charge of−4e/3 at the 7TeV LHC.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 by the National Natural Science Foundation of China under Grant Nos 11205003,11275190,11075150,11005101,and 11175001the Key Research Foundation of Education Ministry of Anhui Province(No KJ2012A021)+1 种基金the Youth Foundation of Anhui Province(No 1308085QA07)the 211 Project of Anhui University(No 02303319).
文摘We calculate the complete next-to-leading order(NLO)QCD corrections to J/ψ+W associated production within the factorization formalism of nonrelativistic QCD at the 7 TeV Large Hadron Collider.We provide the numerical results for the leading-order(LO),NLO QCD corrected differential cross sections of the J/ψtransverse momentum by adopting the event selection criteria requested by the ATLAS experiment.It is found that the differential cross section at the LO is significantly enhanced by the NLO QCD corrections.
基金Supported in part by the National Natural Science Foundation of China under Grant Nos 11075150,11005101,11275190the Specialized Research Fund for the Doctoral Program of Higher Education under Grant No 20093402110030.
文摘We investigate the effects induced by the interactions of the Kaluza–Klein graviton with the standard model(SM)particles on the triple Z^(0)-boson production process at the International Linear Collider in the framework of the large extra dimension(LED)model.We present the dependence of the integrated cross sections on the electron-positron colliding energy√s,and various kinematic distributions of final Z^(0) bosons and their subsequential decay products in both the SM and the LED model.We also provide the relationship between the integrated cross section and the fundamental scale MS by taking the number of the extra dimensions(d)as 3,4,5,and 6,respectively.The numerical results show that the LED effect can induce an observable relative discrepancy for the integrated cross section(δ_(LED)).We find that the relative discrepancy of the LED effect can even reach a few dozen percent in the high transverse momentum area or the central rapidity region of the final Z^(0)-bosons and muons.
基金by the National Natural Science Foundation of China under Grant Nos 10875112,11075150 and 11005101the Specialized Research Fund for the Doctoral Program of Higher Education of China(No 20093402110030).
文摘We present theoretical predictions including the complete next-to-leading order(NLO)QCD corrections to the top quark pair production in association with a photon at the LHC with the center-of-mass system energy of 7TeV.The uncertainties of the leading order(LO)and NLO QCD corrected cross sections due to the renormalization/factorization scale,and the distributions of the transverse momenta of the final top quark and the photon are studied.Moreover,we provide the numerical results of the LO,NLO QCD corrected cross sections and the corresponding𝐾-factors with different photon transverse momentum cuts.We also discuss the impact of QCD corrections to the𝑝pp→tt^(ˉ)γ𝛾+X𝑋in the case that there exists an exotic top quark with an electric charge of−4e/3 at the 7TeV LHC.
