Searching For Dark Matter Particles With Compton-Like Scattering Method

Whether there are dark matter particles in the universe is one of the biggest problems in modern physics.Astronomical observation shows that the proportion of dark matter in the entire universe is about 26.8%.These experiments include the observation of the mass of the Coma galaxy cluster,the rotation curve of the galaxy,the observation of Bullet galaxy cluster with gravitational lens,and the power spectrum of the cosmic microwave background.Different experiments are devoted to the detection and search of dark matter in the mass range from sub-eV to TeV.In the Compton scattering process,when electrons collide with photons,some dark matter particles may be produced,including scalar,pseudoscalar or vector particles.We call this kind of scattering process is Compton-like process.In Compton-like scattering,axions(or axion-like particles)may be produced,which is a pseudoscalar particle and an important candidate for dark matter particles.Dark photon is a kind of vector particle.As one of the candidates of dark matter particles,it may also be produced in Compton-like scattering.In this article,we mainly discuss the possibility of using the Compton process to find dark matter particles on the beamline of the Shanghai laser electron gamma source,including pseudoscalar particles,scalar particles and dark photons.We use the calculation methods in quantum field theory and bring in the relevant parameters of the Shanghai laser electron gamma source to calculate the differential scattering cross sections and scattering cross sections of different dark matter particles(axion-like particles,dark photons,scalar field particles),and draw the relevant total scattering cross section and differential scattering cross section images in the laboratory coordinate system.We found that in the Compton-like scattering process,the dark matter particles are highly concentrated in the forward angle of the incident electron direction,which makes it easier for us to find dark matter particles in the Shanghai laser electron gamma source.With a detector at target area for detecting scattered electrons,which serves as time-of-flight(TOF)start signals,and a detector at the experimental hall area,which serves as TOF stop signals,one can highly suppress the background noise signals,like cosmic rays etc.,which is a very critical issue in the detection of dark matter particles.Through the above work,a possible new platform is provided for us to detect dark matter particles.