Work

Pseudoscalar Higgs boson decay to three parton amplitudes at NNLO to higher orders in the dimensional regulator

Year: 2025

Type: article

Abstract: We present for the first time the second-order corrections of pseudoscalar( A ) Higgs decay to three parton to higher orders in the dimensional regulator. We compute the one- and two-loop amplitudes for processes, A → g g g and A → q q ¯ g , in the effective theory framework. With suitable crossing of the external momenta, these calculations are well-suited for predicting the differential distribution of pseudoscalar Higgs in association with a jet at hadron colliders, up to next-to-next-to-leading order in the strong coupling constant. These results expanded to higher orders in the dimensional regulator will contribute to the full three-loop cross section. We implement the finite pieces of the amplitudes in a numerical code which can be used with any Monte Carlo phase space generator.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.111.054037

Authors: Pulak Banerjee, Chinmoy Dey, M. C. Kumar, V. Ravindran

Institutions: Indian Institute of Technology Guwahati, Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di Cosenza, Institute of Mathematical Sciences, Institute of Mathematical Sciences

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funder: Science and Engineering Research Board

Award: G3481274468