TY  - JOUR
AU  - Bagnaschi, Emanuele
AU  - Harlander, R. V.
AU  - Mantler, H.
AU  - Vicini, A.
AU  - Wiesemann, M.
TI  - Resummation ambiguities in the Higgs transverse-momentum spectrum in the Standard Model and beyond
JO  - Journal of high energy physics
VL  - 2016
IS  - 1
SN  - 1029-8479
CY  - Berlin
PB  - Springer
M1  - PUBDB-2016-01159
M1  - DESY-15-155
M1  - arXiv:1510.08850
SP  - 90
PY  - 2016
AB  - 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.
LB  - PUB:(DE-HGF)29 ; PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000368704500002
DO  - DOI:10.1007/JHEP01(2016)090
UR  - https://bib-pubdb1.desy.de/record/295307
ER  -