2020/07/31 by Tanjona R. Rabemananjara · 3 citations
Physics and Astronomy · #Formalism (music) #Gluon #Higgs boson #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Perturbative QCD #Phenomenology (philosophy) #Propagator #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Resummation #hep-ph
paper · pdf · doi:10.1007/jhep12(2020)073
published in Journal of High Energy Physics 2020(12) (Springer Nature) · 25 pages, 18 figures. Final version, to be published in JHEP. Added definition of fixed-order notation in Sec. 2.4 and comments on Borel prescription in Sec. 3.1
openalex created_date 2020/07/23 · arxiv created 2020/11/25 · openalex publication_date 2020/12/01 · arxiv updated 2020/12/15 · openalex updated_date 2026/08/05
A bstract We study the phenomenological impact of a recently suggested formalism for the combination of threshold and a so-called threshold-improved transverse momentum resummation, by using it to improve the fixed-order results. This formalism allows for a systematic improvement of the transverse momentum resummation that is valid in the entire range of p T by the inclusion of the threshold contribution. We use the Borel method as a suitable prescription for defining the inverse Mellin and Fourier transforms in the context of combined resummed expression. The study is applied to two QCD processes, namely the Higgs boson produced via gluon fusion and Z boson production via the Drell-Yan mechanism. We compare our results to the standard transverse momentum resummation, as well as to the fixed-order results. We find that the threshold-improved transverse momentum resummation leads to faster perturbative convergence at small p T while the inclusion of threshold resummation improves the agreement with fixed-order calculations at medium and large p T . These effects are more pronounced in the case of Higgs which is known to have slower perturbative convergence.