Small- and large- regions for Higgs transverse momentum distributions
arXiv:2011.13842 · doi:10.1016/j.nuclphysbps.2021.05.007
Abstract
It was shown recently that standard resummation of logarithms of can be supplemented with the resummation of logarithmic contributions at large in the case of a colourless final state such as Higgs produced via gluon fusion or the production of a lepton pair via Drell--Yan mechanism. Such an improved transverse momentum resummation takes into account soft emissions that are emitted at very small angles. We report on recent phenomenological studies of a combined threshold-improved and threshold resummation formalism to the Higgs boson produced at the LHC where small- and threshold logarithms are resummed up to NNLL and NNLL* respectively. We show that the effect of the modified resummation yields a faster perturbative convergence in the small- region while the effect of the threshold one improves the agreement with fixed-order calculations in the medium and large- regions.
5 pages, 3 figures