[单选题]
Suppose you were to try to create a hjh c1x/5:rsj proton-antiproton pair 8hm(dq :dx.n em87fzeby annihilation of a very high energy photon. The proton and the anti-proton have the same masses, but opposite charges. What energd(8fe:.qd xm8m7hzn e y photon would be required?
A. $1.022 \; MeV$
B. $1880 \; MeV$
C. $940 \; MeV$
D. $223 \; MeV$
Post time 2024-1-22 02:15:01