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Question 30.CA.4: Conservation of baryon number Which of the following reactio...

Conservation of baryon number

Which of the following reactions obeys the law of conservation of baryon number?

\mathrm{A.  n + p \rightarrow n + p + p + \overline{p} }

 

\mathrm{B.  n + p \rightarrow n + p + \overline{p} }
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In each case, the initial baryon number is 1 + 1 = 2.
In reaction A, the final baryon number for the reaction is 1 + 1 + 1 + (-1) = 2, so the baryon number is conserved. In reaction B, the final baryon number is 1 + 1 + (-1) = 1. Therefore, the baryon number is not conserved, which means that it does not occur in nature. The correct answer is A.

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