In this paper, we elaborate on a method to decompose multiloop multileg scattering amplitudes into Lorentz-invariant form factors, which exploits the simplifications that arise from considering four-dimensional external states. We propose a simple and general approach that applies to both fermionic and bosonic amplitudes and allows us to identify a minimal number of physically relevant form factors, which can be related one to one to the independent helicity amplitudes. We discuss explicitly its applicability to various four- and five-point scattering amplitudes relevant for LHC physics.

Peraro T., Tancredi L. (2021). Tensor decomposition for bosonic and fermionic scattering amplitudes. PHYSICAL REVIEW D, 103(5), 1-14 [10.1103/PhysRevD.103.054042].

Tensor decomposition for bosonic and fermionic scattering amplitudes

Peraro T.;
2021

Abstract

In this paper, we elaborate on a method to decompose multiloop multileg scattering amplitudes into Lorentz-invariant form factors, which exploits the simplifications that arise from considering four-dimensional external states. We propose a simple and general approach that applies to both fermionic and bosonic amplitudes and allows us to identify a minimal number of physically relevant form factors, which can be related one to one to the independent helicity amplitudes. We discuss explicitly its applicability to various four- and five-point scattering amplitudes relevant for LHC physics.
2021
Peraro T., Tancredi L. (2021). Tensor decomposition for bosonic and fermionic scattering amplitudes. PHYSICAL REVIEW D, 103(5), 1-14 [10.1103/PhysRevD.103.054042].
Peraro T.; Tancredi L.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/826667
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