Poster presented by Asit Kumar De

Poster Session

Topic: Theoretical Developments

Fermion decoupling and the axial anomaly on the lattice

Abstract: By an explicit calculation of the continuum limit of the triangle graph amplitude in lattice QED we show that in the axial Ward identity the ABJ anomaly exactly cancels the pseudoscalar density term $2im\langle\overline{\psi}_x\gamma_5\psi_x\rangle_{a=0}$ in the limit of infinite fermion mass $m$. The result, a reflection of decoupling of the heavy fermion, provides a convenient framework for computing the flavor-singlet axial anomaly in non-abelian gauge theories on lattice.

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