Infrared renormalons in Quantum Chromodynamics are associated with non-perturbative corrections to short distance observables. Linear renormalons, i.e. such that the associated non-perturbative corrections scale like one inverse power of the hard scale, can affect at a non-negligible level even the very high-energy phenomena studied at the Large Hadron Collider. Using an Abelian model, we study the presence of linear renormalons in the transverse momentum distribution of a neutral vector boson Z produced in hadronic collisions. We consider a process where the Z transverse momentum is balanced by a sizable recoil against a coloured final state particle. One may worry that such a colour configuration, not being azimuthally symmetric, could generate unbalanced soft radiation, associated in turn with linear infrared renormalons affecting the transverse momentum distribution of the vector boson. We performed a numerical calculation of the renormalon effects for this process in the so-called large b0 limit. We found no evidence of linear renormalons in the transverse momentum distribution of the Z in the large transverse-momentum region, irrespective of rapidity cuts.

Ferrario Ravasio, S., Limatola, G., Nason, P. (2021). Infrared renormalons in kinematic distributions for hadron collider processes. JOURNAL OF HIGH ENERGY PHYSICS, 2021(6) [10.1007/JHEP06(2021)018].

Infrared renormalons in kinematic distributions for hadron collider processes

Ferrario Ravasio, S
;
Limatola, G;Nason, P
2021

Abstract

Infrared renormalons in Quantum Chromodynamics are associated with non-perturbative corrections to short distance observables. Linear renormalons, i.e. such that the associated non-perturbative corrections scale like one inverse power of the hard scale, can affect at a non-negligible level even the very high-energy phenomena studied at the Large Hadron Collider. Using an Abelian model, we study the presence of linear renormalons in the transverse momentum distribution of a neutral vector boson Z produced in hadronic collisions. We consider a process where the Z transverse momentum is balanced by a sizable recoil against a coloured final state particle. One may worry that such a colour configuration, not being azimuthally symmetric, could generate unbalanced soft radiation, associated in turn with linear infrared renormalons affecting the transverse momentum distribution of the vector boson. We performed a numerical calculation of the renormalon effects for this process in the so-called large b0 limit. We found no evidence of linear renormalons in the transverse momentum distribution of the Z in the large transverse-momentum region, irrespective of rapidity cuts.
Articolo in rivista - Articolo scientifico
Perturbative QCD; Renormalization Regularization and Renormalons;
English
3-giu-2021
2021
2021
6
18
open
Ferrario Ravasio, S., Limatola, G., Nason, P. (2021). Infrared renormalons in kinematic distributions for hadron collider processes. JOURNAL OF HIGH ENERGY PHYSICS, 2021(6) [10.1007/JHEP06(2021)018].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/394908
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