Abstract
We include finite top- and bottom-mass effects in the next-to-next-to-leading order parton shower (NNLOPS) event generator for inclusive Higgs boson production in gluon fusion based upon the POWHEG+MiNLO approach. Since fixed-order results for quark-mass effects only reach NLO accuracy, we add them to the NNLOPS generator at that accuracy. We explore uncertainties related to the unknown all-order logarithmic structure of bottom-mass effects by comparing the assumption of full exponentiation to no exponentiation at all. Phenomenological results showing the effects of finite quark-masses in the NNLOPS simulation are presented. These suggest that the aforementioned uncertainty is well contained within the envelope of plain renormalization and factorization scale uncertainties.
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ArXiv ePrint: 1501.04637
On leave from Rudolf Peierls Centre for Theoretical Physics, University of Oxford, 1 Keble Road, U.K.. (Giulia Zanderighi)
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Hamilton, K., Nason, P. & Zanderighi, G. Finite quark-mass effects in the NNLOPS POWHEG+MiNLO Higgs generator. J. High Energ. Phys. 2015, 140 (2015). https://doi.org/10.1007/JHEP05(2015)140
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DOI: https://doi.org/10.1007/JHEP05(2015)140