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Weak hypercharge
The
weak hypercharge
in
particle physics
is a
quantum number
relating the
electric charge
and the third component of
weak isospin
. It is
conserved
(only terms that are overall weak-hypercharge neutral are allowed in the Lagrangian) and is similar to the
Gell-Mann–Nishijima formula
for the
hypercharge
of strong interactions (which is not conserved in weak interactions). It is frequently denoted
Y
W
and corresponds to the
gauge symmetry
U(1)
.
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