Charm (quantum number)

Charm (symbol C) is a flavour quantum number representing the difference between the number of charm quarks (c) and charm antiquarks (c) that are present in a particle: By convention, the sign of flavour quantum numbers agree with the sign of the electric charge carried by the quarks of corresponding flavour. The charm quark, which carries an electric charge (Q) of +2⁄3, therefore carries a charm of +1. The charm antiquarks have the opposite charge (Q = −2⁄3), and flavour quantum numbers (C = −1).

Charm (quantum number)

Charm (symbol C) is a flavour quantum number representing the difference between the number of charm quarks (c) and charm antiquarks (c) that are present in a particle: By convention, the sign of flavour quantum numbers agree with the sign of the electric charge carried by the quarks of corresponding flavour. The charm quark, which carries an electric charge (Q) of +2⁄3, therefore carries a charm of +1. The charm antiquarks have the opposite charge (Q = −2⁄3), and flavour quantum numbers (C = −1).