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arXiv · 1603.08000

On the Higgs cross section at N$^3$LO+N$^3$LL and its uncertainty

Marco Bonvini·Simone Marzani·Claudio Muselli·Luca Rottoli
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Abstract

We consider the inclusive production of a Higgs boson in gluon-fusion and we study the impact of threshold resummation at next-to-next-to-next-to-leading logarithmic accuracy (N$^3$LL) on the recently computed fixed-order prediction at next-to-next-to-next-to-leading order (N$^3$LO). We propose a conservative, yet robust way of estimating the perturbative uncertainty from missing higher (fixed- or logarithmic-) orders. We compare our results with two other different methods of estimating the uncertainty from missing higher orders: the Cacciari-Houdeau Bayesian approach to theory errors, and the use of algorithms to accelerate the convergence of the perturbative series. We confirm that the best convergence happens at $\mu_R=\mu_F=m_H\,/\,2$, and we conclude that a reliable estimate of the uncertainty from missing higher orders on the Higgs cross section at 13 TeV is approximately $\pm4$%.

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Marco Bonvini, Simone Marzani, Claudio Muselli, Luca Rottoli. 2016-03-25. On the Higgs cross section at N$^3$LO+N$^3$LL and its uncertainty. https://doi.org/10.1007/jhep08(2016)105

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