The baryon number of a quark is:

Question

Quizplus · Accepted Answer

The baryon number of a quark is defined as 1/3 for all quarks. The baryon number of a hadron (such as a proton or neutron) is the sum of the baryon numbers of the quarks that make it up. Since a proton is made up of two up quarks (each with a baryon number of 1/3) and one down quark (with a baryon number of -1/3), the total baryon number of a proton is (1/3 + 1/3 - 1/3) = 1. Similarly, the baryon number of a neutron (which is made up of two down quarks and one up quark) is also 1.

The Baryon Number of a Quark Is