In the Dirac-Pauli representation, an operator partially named for this quantity takes the form of i times the 2nd gamma matrix; that operator doesn't change helicity, but it flips the sign of all additive quantum numbers.
In the Dirac-Pauli representation, an operator partially named for this quantity takes the form of i times the 2nd gamma matrix; that operator doesn't change helicity, but it flips the sign of all additive quantum numbers. Lines running from the top left to the bottom right of an Eightfold Way diagram represent particles with the same value for this quantity. The symmetry named for this quantity is combined with (*) parity symmetry to form a symmetry violated by the weak force. The value of this quantity for the electron was determined by a measurement of the falling velocity of oil drops by Robert Millikan. Equal to two-thirds for the up quark and minus one-thirds for the down quark, for 10 points, name this quantity which for the electron is minus 1.6 times 10 to the minus 19 coulombs.
In the Dirac-Pauli representation, an operator partially named for this quantity takes the form of i times the 2nd gamma matrix; that operator doesn't change helicity, but it flips the sign of all additive quantum numbers.
electric charge [accept "charge conjugation"]