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The role of chirality is discussed in unifying the anomaly and the tunnelingformalisms for deriving the Hawking effect. Using the chirality condition andstarting from the familiar form of the trace anomaly, the chiral(gravitational) anomaly, manifested as a nonconservation of the stress tensor,near the horizon of a black hole, is derived. Solution of this equation yieldsthe stress tensor whose asymptotic infinity limit gives the Hawking flux.Finally, use of the same chirality condition in the tunneling formalism givesthe Hawking temperature that is compatible with the flux obtained by anomalymethod.

Connecting anomaly and tunneling methods for Hawking effect through chirality