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Calculations near the Banks-Zaks fixed point show that, for massless flavours and a sufficiently small number of species, the theory becomes conformal and can be treated perturbatively.
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Calculations near the Banks-Zaks fixed point show that, for massless flavours and a sufficiently small number of species, the theory becomes conformal and can be treated perturbatively.
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Related words
Banks-Zaks fixed point
Noun
(quantum
chromodynamics)
In
quantum
chromodynamics
with
massless
flavours,
where
the
number
of
flavours
is
sufficiently
small
(i.e.
small
enough
to
guarantee
asymptotic
freedom,
depending
on
the
number
of
colours),
an
interacting
conformal
fixed
point
of
the
renormalization
group
where
the
value
of
the
coupling
is
less
than
one
(i.e.
one
can
perform
perturbation
theory
in
weak
coupling).
Japanese Meaning
Banks‐Zaks固定点とは、質量のないフレーバーを持つ量子色力学において、フレーバー数が十分に少なく（色数に依存し、非自明な漸近自由性を保証できるほど小さい場合）現れる、相互作用するコンフォーマルな（共形）固定点を指す。ここでは結合定数の値が1未満であり、これにより弱結合状態での摂動論が適用可能となる。
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