2020/09/30 by Simone Alioli, Alessandro Broggio, Alessandro Gavardi +5 · 31 citations
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Event (particle physics) #Event generator #Factorization #Hadron #Higgs boson #Jet (fluid) #Logarithm #Particle physics theoretical and experimental studies #Parton #Quantum Chromodynamics and Particle Interactions #Standard Model (mathematical formulation) #hep-ex #hep-ph
paper · pdf · doi:10.1007/jhep04(2021)254
published in Journal of High Energy Physics 2021(4) (Springer Nature) · 34 pages, 10 figures - matches version published in JHEP
openalex created_date 2020/10/08 · openalex publication_date 2021/04/01 · arxiv created 2021/04/22 · arxiv updated 2021/05/12 · openalex updated_date 2026/08/05
A bstract We present the NNLL′ resummed 2-jettiness distribution for decays of the Standard Model Higgs boson to a b b <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mover> <mml:mi>b</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> -quark pair and to gluons. The calculation exploits a factorisation formula derived using Soft-Collinear Effective Theory, in which large logarithms of the 2-jettiness are resummed by renormalisation group evolution of the hard, soft and jet contributions to the differential decay rate. We match the resummed predictions to the fixed-order NNLO result using the Geneva framework, extending the validity of the results to all values of the resolution variable and providing a fully exclusive NNLO event generator matched to the Pythia8 parton shower.