Physics Unit32: Elementary Particles (id: 206bc84a3)

[单选题]
Identify the missing4 y4ne-naan8jg4cv mm4u2j x+ part w4pcm d47h0 edvd1iz0:xqmx+icle in the following reaction.
$\pi^- \;+\; p \rightarrow \pi^- \;+\; \pi^- \;+\; \pi^+ \;+\; \;\;\;\;\;\;$ ?

A. $p$
B. $n$
C. $e$
D. $\nu_{\mu}$


参考答案:  A


本题详细解析: 暂无