[单选题]
The Feynman diagram x3w9(g b basl3tu1ylfg60 ma1shows two electrons approach o qyhls;f7t/na7o,( )e3ekzding each other, interacting, and then leaving each other. What particle 7( ntok; /7ezf3e yhdl,o)sqais being exchanged during the interaction?
A. pion
B. virtual photon
C. neutrino
D. $W$ particle
Post time 2024-1-22 02:15:01
