In theoretical physics, a chiral anomaly is the anomalous nonconservation of a chiral current. In everyday terms, it is equivalent to a sealed box that...

conformal symmetry of the classical theory Chiral anomaly, an anomalous nonconservation of a chiral current Gauge anomaly, the effect of quantum mechanics that...

perturbative local anomalies vanish. Chiral anomaly Conformal anomaly (anomaly of scale invariance) Gauge anomaly Global anomaly Gravitational anomaly (also known...

for his foundational work on the chiral anomaly (the Adler-Bardeen theorem), the Yang-Mills and gravitational anomalies, the development of quantum chromodynamics...

pieces of the Standard Model of physics are non-chiral, which is traceable to anomaly cancellation in chiral theories. Quantum chromodynamics is an example...

electrodynamics. (At the quantum loop level, the chiral symmetry is broken, even for massless electrons, by the chiral anomaly, but the U ( 1 ) {\displaystyle U(1)}...

quantum field theory, the anomaly matching condition by Gerard 't Hooft states that the calculation of any chiral anomaly for the flavor symmetry must...

In gauge theory, topological Yang–Mills theory, also known as the theta term or θ {\displaystyle \theta } -term is a gauge-invariant term which can be...

with charged chiral fermions, such as the quark–gluon plasma, or Dirac and Weyl semimetals. The CME is a consequence of chiral anomaly in quantum field...

Peipei; Chen, Dong; Yang, Zhanhai; et al. (2015). "Observation of the chiral-anomaly-induced negative magnetoresistance in 3‑D Weyl semimetal TaAs". Physical...

Feynman diagrams. In vector gauge anomalies (in gauge symmetries whose gauge boson is a vector), the anomaly is a chiral anomaly, and can be calculated exactly...

suffer from fermion doublings leading to a loss of chirality. Chiral anomaly Ball, R.D. (1989). "Chiral gauge theory". Physics Reports. 182 (1–2). Elsevier...

currents thus couple to the axial vector current and so participate in the chiral anomaly. Pions, which are mesons with zero spin, are composed of first-generation...

violated, if the difference between them (B − L) is conserved (see Chiral anomaly). Strong interactions conserve all flavours, but all flavour quantum...

the flavour group. This is broken by the chiral anomaly. The presence of instantons implied by this anomaly also breaks CP symmetry. In summary, the QCD...

couple via the electromagnetic current.) Chiral anomaly QCD Chiral symmetry breaking Chiral perturbation theory Chiral magnetic effect Parity (physics) Byers...

number (quark number) is conserved (under normal circumstances; see Chiral anomaly for an exception). Therefore, protons will not decay into other particles...

Therefore, all gravitational anomalies must cancel out. The anomaly usually appears as a Feynman diagram with a chiral fermion running in the loop (a...

gauge invariant modulo addition of an integer. Chern–Weil homomorphism Chiral anomaly Topological quantum field theory Jones polynomial Freed, Daniel (January...

In physics, Fujikawa's method is a way of deriving the chiral anomaly in quantum field theory. It uses the correspondence between functional determinants...

deflected by a virtual photon emitted by a quark from the hadron Chiral anomaly Anomaly-induced neutral pion decay π 0 → γ γ   . {\displaystyle \pi ^{0}\to...

emergent but neutral excitation and theoretically interpreted superfluid's chiral anomaly as observation of Fermi points is in Helium-3 A superfluid phase.[non-primary...

chromodynamics (QCD) this leads to asymptotic freedom. The chiral anomaly in either chiral or vector field theories with fermions. This has close connection...

involved is related to the weak nuclear force, and is an example of chiral anomaly. Such processes could have hypothetically created leptons in the early...

change in the path integral measure, an effect closely connected to the chiral anomaly. The theory would be CP invariant if one could eliminate both sources...

right-handed Weyl species for a given combination of generators. The correct chiral anomaly. An action bilinear in Weyl fields. A short proof by contradiction points...

conservation is broken non-perturbatively, i.e. by quantum anomaly. At least one such mechanism is chiral anomaly, which requires the existence of the weak interaction...

accept new particles even if it is filled. This happens when we have a chiral anomaly and a gauge instanton. The development of quantum field theory (QFT)...

SU(2) and the U(1) of the Standard Model. The anomaly usually appears as a Feynman diagram with a chiral fermion running in the loop (a polygon) with n−k...

SU(2) anomaly. Another new but much more subtle example is found in 2018, also for the SU(2) gauge theory in 4D, with an odd number of chiral fermions...