Journal of High Energy Physics (May 2024)
N-jettiness soft function at next-to-next-to-leading order in perturbative QCD
Abstract
Abstract We derive a compact representation of the renormalized N-jettiness soft function that is free of infrared and collinear divergences through next-to-next-to-leading order in perturbative QCD. The number of hard partons N is a parameter in the formula for the finite remainder. Cancellation of all infrared and collinear singularities between the bare soft function and its renormalization matrix in color space is demonstrated analytically.
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