Charm is a flavour quantum number representing the difference between the number of charm quarks and charm antiquarks that are present in a particle: C = n c − n c ¯ {\displaystyle C=n_{\text{c}}-n_{\mathrm {\bar {c}} }\ } By convention, the sign of flavour quantum numbers agree with the sign of the electric charge carried by the quarks of corresponding flavour.
Charm is a computer programming language devised in the early 1990s with similarities to the RTL/2, Pascal and C languages in addition to containing some unique features of its own.
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