NNLO soft function for threshold single inclusive jet production

We present a computation of the global soft function for single inclusive hadronic jet production at next-to-next-to-leading order in the strong coupling constant involving four lightlike Wilson lines. Our soft function belongs to SCET1 observables, which arc not sensitive the rapidity divergences and obey the non-Abelian exponentiation theorem. We provide the calculation of the soft function involving four collinear light-cone directions for all 2 -> 2 processes extending the previous result. We perform the threshold resummation for these processes at the next-to-next-to-leading logarithmic accuracy and present the corresponding numerical results.

Automated summary

The study presents a computation of the global soft function for single inclusive hadronic jet production at next-to-next-to-leading order, involving four lightlike Wilson lines and falling under SCET1 observables. The soft function is not sensitive to rapidity divergences and follows the non-Abelian exponentiation theorem. The research extends previous results by providing calculations for all 2 -> 2 processes involving four collinear light-cone directions, with threshold resummation performed at next-to-next-to-leading logarithmic accuracy and corresponding numerical results presented.