2)Electrons of energy 4.00 GeV are incident upon stationary target protons and a search is made for neutral particles Q° produced in the reaction \mathrm{e}^{-}+\mathrm{p} \rightarrow \mathrm{e}^{-}+\mathrm{p}+\mathrm{Q}^{0} What is the

maximum mass of Q° which can be produced? Use any reasonable approximations,but justify your arguments. Make clear which statements you make are generally valid, and which are specific to the case of maximum Q° mass. [Mass of electron is 0.511 MeV/c²; that of proton is 938.3 MeV/c².]