Lightcone commutator and stress-tensor exchange in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>d</mml:mi><mml:mo>&gt;</mml:mo><mml:mn>2</mml:mn></mml:math> conformal field theories
Physical review. D/Physical review. D.