The precise description of jet processes requires observables capable of efficiently capturing the dynamics of the energy flow in hadronic final states. We consider a class of transverse-momentum like resolution variables that smoothly describe the n+1 to n jet transition in multi-jet processes. We discuss a general method for the computation of the corresponding quark jet function at next-to-next-to-leading order in perturbative QCD. Rapidity divergences are regulated by using a time-like auxiliary vector. We present explicit results for a variant of y23 in the E-scheme and in the WTA scheme.
Buonocore, L., Grazzini, M., Guadagni, F., Haag, J., Rottoli, L. (2025). The quark jet function for kT-like variables in NNLO QCD. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 85(11) [10.1140/epjc/s10052-025-15048-2].
The quark jet function for kT-like variables in NNLO QCD
Rottoli L.
2025
Abstract
The precise description of jet processes requires observables capable of efficiently capturing the dynamics of the energy flow in hadronic final states. We consider a class of transverse-momentum like resolution variables that smoothly describe the n+1 to n jet transition in multi-jet processes. We discuss a general method for the computation of the corresponding quark jet function at next-to-next-to-leading order in perturbative QCD. Rapidity divergences are regulated by using a time-like auxiliary vector. We present explicit results for a variant of y23 in the E-scheme and in the WTA scheme.
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