Prelimiary Study On Design Indexes Of EMC Position And Energy Resolution On The STCF

Beijing Electron Positron Collider(BEPCII)has acquired about 10 billion large data samples of J/? cases so far.It is the only large-scale scientific device working in ?-charm physical energy area in the world,and its research in ?-charm physical energy area is in the international leading position.Beijing Spectrometer(BESIII)is the detector on Beijing Electron Positron Collider(BEPC).Electromagnetic Calorimeter(EMC)is one of the most important sub-detectors for detecting neutral track on BESIII.Its posotion resolution and energy resolution have important influence on its detection ability.As one of the next generation of particle physics accelerators in China,it is of great significance to study the EMC position and enegry resolution and other design indicators on STCF.In this paper,it will through the study of J/????? Monte Carlo samples(MC),the important design indexes of EMC position and enegry resolution on STCF are discussed.This work mainly uses the off-line software environment based on BES? and STCF to generate Monte Carlo samples simulating the decay process of J/????? signal decay and background decay,and then MC samples further study the influence of EMC position resolution and enegry resolution on photon detection efficiency,give the trend of signal and background selection efficiency changing with detector position and energy resolution,and get the efficiency curve It can provide important reference indexes for STCF to determine EMC parameters in line with physical targets,so as to improve the efficiency of next generation detector construction funds.In this work,we measured the change trend of the efficiency of signal and background decay in different EMC position and enegry resolution,and further found that improving EMC energy resolution can better improve the detection efficiency of signal and effectively reduce the background noise pollution.