Report/Journal Article

PUBDB-2016-01159

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Resummation ambiguities in the Higgs transverse-momentum spectrum in the Standard Model and beyond

Bagnaschi, E. (Corresponding author)DESY* ; Harlander, R. V. ; Mantler, H. ; Vicini, A. ; Wiesemann, M.

2016
Springer Berlin

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Please use a persistent id in citations: doi:10.1007/JHEP01(2016)090

Report No.: DESY-15-155; arXiv:1510.08850

Abstract: 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.

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF3-611) (POF3-611)
2. SFB 676 B08 - Globale SM + BSM Fits mit Resultaten vom LHC und anderen Experimenten (B08) (87303299) (87303299)
3. HIGGSTOOLS - The Higgs quest - exploring electroweak symmetry breaking at the LHC (316704) (316704)
4. MCNETITN - Training Network for Monte Carlo Event Generators for LHC Physics (315877) (315877)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2016

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Database coverage:
; ; ; ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; IF >= 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint/Report Bagnaschi, E. (Corresponding author)DESY* ; Harlander, R. V. ; Mantler, H. ; Vicini, A. ; Wiesemann, M.
Resummation ambiguities in the Higgs transverse-momentum spectrum in the Standard Model and beyond
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