Baryon number
from class: College Physics I – Introduction Definition Baryon number is a quantum number representing the difference between the number of baryons and antibaryons in a system. It is conserved in most particle interactions, meaning the total baryon number remains constant.
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Predict what's on your test 5 Must Know Facts For Your Next Test Baryon number is defined as $B = \frac{1}{3}(n_q - n_{\bar{q}})$, where $n_q$ is the number of quarks and $n_{\bar{q}}$ is the number of antiquarks. Protons and neutrons each have a baryon number of +1. Antiprotons and antineutrons each have a baryon number of -1. In any nuclear reaction or particle decay, the total baryon number before and after the process must be equal. Leptons have a baryon number of 0. Review Questions What is the baryon number for a proton? How does baryon number conservation apply to nuclear reactions? What would be the baryon number of an atom with one proton, one neutron, and no antibaryons? "Baryon number" also found in:
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