Analytic integration of real-virtual counterterms in NNLO jet cross sections II
نویسندگان
چکیده
We present analytic expressions of all integrals required to complete the explicit evaluation of the real-virtual integrated counterterms needed to define a recently proposed subtraction scheme for jet cross sections at next-to-next-to-leading order in QCD. We use the Mellin-Barnes representation of these integrals in 4 − 2ǫ dimensions to obtain the coefficients of their Laurent expansions around ǫ = 0. These coefficients are given by linear combinations of multidimensional Mellin-Barnes integrals. We compute the coefficients of such expansions in ǫ both numerically and analytically by complex integration over the Mellin-Barnes contours.
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