%0 Journal Article
%A Bagnaschi, Emanuele
%A Harlander, R. V.
%A Mantler, H.
%A Vicini, A.
%A Wiesemann, M.
%T Resummation ambiguities in the Higgs transverse-momentum spectrum in the Standard Model and beyond
%J Journal of high energy physics
%V 2016
%N 1
%@ 1029-8479
%C Berlin
%I Springer
%M PUBDB-2016-01159
%M DESY-15-155
%M arXiv:1510.08850
%P 90
%D 2016
%X We study the prediction for the Higgs transverse momentum distribution ingluon fusion and focus on the problem of matching fixed- and all-order perturbative results.The main sources of matching ambiguities on this distribution are investigated by means ofa twofold comparison. On the one hand, we present a detailed qualitative and quantitativecomparison of two recently introduced algorithms for determining the matching scale [1, 2].On the other hand, we apply the results of both methods to three widely used approaches forthe resummation of logarithmically enhanced contributions at small transverse momenta:the MC@NLO and POWHEG Monte Carlo approaches, and analytic resummation. While thethree sets of results are largely compatible in the low-p ⊥ region, they exhibit sizable differ-ences at large p ⊥ . We show that these differences can be significantly reduced by suitablemodifications of formally subleading terms in the Monte Carlo implementations. We ap-ply our study to the Standard Model Higgs boson and to the neutral Higgs bosons of theTwo-Higgs-Doublet Model for representative scenarios of the parameter space, where thetop- and bottom-quark diagrams enter the cross section at different strengths.
%F PUB:(DE-HGF)29 ; PUB:(DE-HGF)16
%9 ReportJournal Article
%U <Go to ISI:>//WOS:000368704500002
%R 10.1007/JHEP01(2016)090
%U https://bib-pubdb1.desy.de/record/295307