Abstract
The rapidity-dependent jet veto observables \( {\mathcal{T}}_{Bj} \) and \( {\mathcal{T}}_{Cj} \) provide a tight jet veto at central rapidity, gradually transitioning to a loose veto at forward rapidities. They divide the phase space into exclusive jet bins in a different way to the traditional jet veto observable pT j, and are advantageous to use under harsh pile-up conditions. We obtain predictions for the 0-jet gluon-fusion (ggF) Higgs cross section using both of these veto observables at NNLL′+NNLO, and compare these predictions to the prior state-of-the-art of NLL′+NLO. A significant reduction in perturbative uncertainty is observed going from NLL′+NLO to NNLL′+NNLO, with the NNLL′+NNLO predictions lying inside the uncertainty band of the NLL′+NLO predictions. We also investigate the relative sensitivities of ggF Higgs cross sections with \( {\mathcal{T}}_{Bj} \), \( {\mathcal{T}}_{Cj} \) and pT j jet vetoes to underlying event and hadronisation effects using an NLO+parton shower calculation. We find that the cross sections with \( {\mathcal{T}}_{Bj} \) and \( {\mathcal{T}}_{Cj} \) vetoes have a reduced sensitivity to underlying event and hadronisation effects compared to that with a pT j veto.
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Gangal, S., Gaunt, J.R., Tackmann, F.J. et al. Higgs production at NNLL′+NNLO using rapidity dependent jet vetoes. J. High Energ. Phys. 2020, 54 (2020). https://doi.org/10.1007/JHEP05(2020)054
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DOI: https://doi.org/10.1007/JHEP05(2020)054