Journal Article Products of composite operators in the exact renormalization group formalism

Pagani, C.  ,  Sonoda, H.

2018 ( 2 )  , p.023B02 , 2018-02 , Oxford University Press (OUP)
We discuss a general method of constructing the products of composite operators using the exact renormalization group formalism. Considering mainly the Wilson action at a generic fixed point of the renormalization group, we give an argument for the validity of short-distance expansions of operator products. We show how to compute the expansion coefficients by solving differential equations, and test our method with some simple examples.

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