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GIM mechanism
In
quantum field theory
, the
GIM mechanism
(or
Glashow–Iliopoulos–Maiani mechanism
) is the mechanism by which
flavour-changing neutral currents
(FCNCs) are suppressed. It also explains why
weak interactions
that change
strangeness
by 2 (Δ
S
= 2 transitions) are suppressed while those that change strangeness by 1 (Δ
S
= 1 transitions) are allowed. The mechanism was put forth by
Sheldon Lee Glashow
,
John Iliopoulos
and
Luciano Maiani
in their famous paper "Weak Interactions with Lepton–Hadron Symmetry" published in
Physical Review D
in 1970.
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