We compute the quantum chromodynamics (QCD) corrections to the decay of a neutralino to gluinos and partons at next-to-next-to-next-to-leading order (N3LO) in the strong coupling constant αs, integrated separately over the phase-space of two, three, four or five particles in the final state. The resulting matrix elements are related to the quark-gluon antenna functions, completing the set of integrated antenna functions in final-final kinematics required for the extension of the antenna subtraction scheme to N3LO. For a model with massless partons (quarks and gluons) and an arbitrary number of adjoint fermions, we obtained the following new results to O(αs3) : the inclusive cross section for the decay of a neutralino, the renormalization of the effective coupling of a neutralino to a gluino and gluon(s), the gluino collinear anomalous dimension, the gluino contribution to the parton collinear anomalous dimensions and the neutralino-gluino-gluon(s) vertex form factors. A special case of this model is the N = 1 super Yang-Mills theory, where we can relate some of our findings to known results.

Chen, X., Jakubčík, P., Marcoli, M., Stagnitto, G. (2023). Radiation from a gluon-gluino colour-singlet dipole at N3LO. JOURNAL OF HIGH ENERGY PHYSICS, 2023(12) [10.1007/JHEP12(2023)198].

Radiation from a gluon-gluino colour-singlet dipole at N3LO

Stagnitto, G
2023

Abstract

We compute the quantum chromodynamics (QCD) corrections to the decay of a neutralino to gluinos and partons at next-to-next-to-next-to-leading order (N3LO) in the strong coupling constant αs, integrated separately over the phase-space of two, three, four or five particles in the final state. The resulting matrix elements are related to the quark-gluon antenna functions, completing the set of integrated antenna functions in final-final kinematics required for the extension of the antenna subtraction scheme to N3LO. For a model with massless partons (quarks and gluons) and an arbitrary number of adjoint fermions, we obtained the following new results to O(αs3) : the inclusive cross section for the decay of a neutralino, the renormalization of the effective coupling of a neutralino to a gluino and gluon(s), the gluino collinear anomalous dimension, the gluino contribution to the parton collinear anomalous dimensions and the neutralino-gluino-gluon(s) vertex form factors. A special case of this model is the N = 1 super Yang-Mills theory, where we can relate some of our findings to known results.
Articolo in rivista - Articolo scientifico
Higher-Order Perturbative Calculations; Supersymmetric Gauge Theory; Supersymmetry;
English
29-dic-2023
2023
2023
12
198
open
Chen, X., Jakubčík, P., Marcoli, M., Stagnitto, G. (2023). Radiation from a gluon-gluino colour-singlet dipole at N3LO. JOURNAL OF HIGH ENERGY PHYSICS, 2023(12) [10.1007/JHEP12(2023)198].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/473099
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