Simulation Of Charged Higgs Bosons Signature At Large Hadron Collider

The Standard Model of particle physics is a theory describing basic particles and their interactions.In the past few decades,the correctness of the standard model has been accurately tested by various experiments,especially the discovery of Higgs boson at the Large Hadron Collider(LHC)in 2012,which complements the last part of the Standard Model.So far,all particles predicted by the standard model have been observed.However,with the development of theory and experiment,more and more evidences point out that the standard model is incomplete,such as neutrino oscillation,dark matter,dark energy,baryon anti baryon asymmetry and so on.Whether the Higgs boson discovered in LHC in 2012 is the only scalar particle can not be answered by the standard model.In order to find the answers to these questions,we need to rely on the new physics beyond the standard model.The research on the new physics beyond the standard model has become one of the important directions of the theoretical and experimental research of particle physics.In this paper,the charged Higgs boson is taken as an example,First we briefly introduced the standard model with some other models which can give rise the charged Higgs bosons,such as the Tow Higgs Doublet Model(2HDM)and the Inert Doublet Model(IDM).Then,taking IDM model as an example,we do precise study on the process of pp?H^±H^±jj accompanied by the leptonic decay mode of charged Higgs bosons H±?HW±(l±v)at(?)=14TeV High Luminosity LHC and(?)=27TeV High Energy LHC,here the neutral scalar particle H is a dark matter candidate.Under the assumption in this paper,when the mass of the charged Higgs boson is greater than the HW threshold,the branching ratio of the leptonic decay mode of the charged Higgs bosons is close to 1(BR(H^±?+HW^±)/?(H^±)?1).Then we randomly scanned the low mass range of IDM,and found three feasible parameter spaces by requiring the abundance of dark matter to be within the 3? range of Planck observation ?h²=0.1200±0.0012,they are the Higgs resonance region m_H?mh/2,vector boson annihilation region m_H?71.5GeV,coannihilation region m_H?65GeV accompanied with mA-m_H?8GeV.Considering that the cross section of the same sign diplepton signal given by the coannihilation region can be ignored,we choose 20 Benchmark Points in the Higgs resonance region and the vector boson annihilation region.We simulate the same sign diplepton signal for all Benchmark Points as well as the corresponding background process.According to our simulation,it is difficult to observe the signal for the High Luminosity LHC(?)=14TeV with luminosity L=3ab^-1,and for the High Energy LHC(?)=27TeV with luminosity L=15ab^-1,when 250GeV<m_H±-m_H<300GeV and 60GeV<m_H<71GeV,the signal can achive a significance more than 5?.These results have important reference value for studying the existence of charged Higgs bosons and searching for possible dark matter signal in LHC.