Thursday, 14 March 2019

particle physics - Energy dependency of the total cross section for different species


Comparing the plots for the total (inelastic) cross sections as a function of the centre of mass energy for $pp$ and $e^+e^-$ collisions:


proton-proton cross section


electron-positron cross section


one notes that the trend at high energy is opposite: the $pp$ cross section increases while the $e^+e^-$ decreases. Is there a (simple) explanation for this?




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