Higgs-boson plus Dijets: Higher-Order Matching for High-Energy Predictions

Andersen, Jeppe R; Hapola, Tuomas; Heil, Marian; Maier, Andreas; Smillie, Jennifer M

Abstract

Several important processes and analyses at the LHC are sensitive to higher-order perturbative corrections beyond what can currently be calculated at fixed order. The formalism of High Energy Jets (HEJ) calculates the corrections systematically enhanced for a large ratio of the centre-of-mass energy to the transverse momentum of the observed jets. These effects are relevant in the analysis of e.g. Higgs-boson production in association with dijets within the cuts devised to enhance the contribution from Vector Boson Fusion (VBF). HEJ obtains an all-order approximation, based on logarithmic corrections which are matched to fixed-order results in the cases where these can be readily evaluated. In this paper we present an improved framework for the matching utilised in HEJ, which for merging of tree-level results is mathematically equivalent to the one used so far. However, by starting from events generated at fixed order and supplementing these with the all-order summation, it is computationally simpler to obtain matching to calculations of high multiplicity. We demonstrate that the impact of the higher-multiplicity matching on predictions is small for the gluon-fusion (GF) contribution of Higgs-boson production in association with dijets in the VBF-region, so perturbative stability against high-multiplicity matching has been achieved within HEJ. We match the improved HEJ prediction to the inclusive next-to-leading order (NLO) cross section and compare to pure NLO in the h → γγ channel with standard VBF cuts.

Citation

Andersen, J. R., Hapola, T., Heil, M., Maier, A., & Smillie, J. M. (2018). Higgs-boson plus Dijets: Higher-Order Matching for High-Energy Predictions. Journal of High Energy Physics, 2018(08), Article 090. https://doi.org/10.1007/jhep08%282018%29090

• Journal Article Type: Article
• Acceptance Date: Aug 9, 2018
• Online Publication Date: Aug 16, 2018
• Publication Date: Aug 16, 2018
• Deposit Date: Jun 28, 2018
• Publicly Available Date: Aug 30, 2018
• Journal: Journal of High Energy Physics
• Print ISSN: 1126-6708
• Electronic ISSN: 1029-8479
• Publisher: Scuola Internazionale Superiore di Studi Avanzati (SISSA)
• Peer Reviewed: Peer Reviewed
• Volume: 2018
• Issue: 08
• Article Number: 090
• DOI: https://doi.org/10.1007/jhep08%282018%29090
• Public URL: https://durham-repository.worktribe.com/output/1327850
• Related Public URLs: https://arxiv.org/abs/1805.04446