Extrapolating W-associated jet-production ratios at the LHC

Bern, B.; Dixon, L.J.; Febres Cordero, F.; Hoeche, S.; Ita, H.; Maitre, D.

Abstract

Electroweak vector-boson production, accompanied by multiple jets, is an important background to searches for physics beyond the standard model. A precise and quantitative understanding of this process is helpful in constraining deviations from known physics. We study four key ratios in W+n-jet production at the LHC. We compute the ratio of cross sections for W+n- to W+(n−1)-jet production as a function of the minimum jet transverse momentum. We also study the ratio differentially, as a function of the W-boson transverse momentum; as a function of the scalar sum of the jet transverse energy, HjetsT; and as a function of certain jet transverse momenta. We show how to use such ratios to extrapolate differential cross sections to W+6-jet production at next-to-leading order, and we cross-check the method against a direct calculation at leading order. We predict the differential distribution in HjetsT for W+6 jets at next-to-leading order using such an extrapolation. We use the BlackHat software library together with SHERPA to perform the computations.

Citation

Bern, B., Dixon, L., Febres Cordero, F., Hoeche, S., Ita, H., & Maitre, D. (2015). Extrapolating W-associated jet-production ratios at the LHC. Physical Review D, 92(1), Article 014008. https://doi.org/10.1103/physrevd.92.014008

• Journal Article Type: Article
• Acceptance Date: Apr 23, 2015
• Online Publication Date: Jul 7, 2015
• Publication Date: Jul 7, 2015
• Deposit Date: Oct 27, 2015
• Publicly Available Date: Nov 12, 2015
• Journal: Physical Review D - Particles, Fields, Gravitation, and Cosmology
• Print ISSN: 1550-7998
• Electronic ISSN: 1550-2368
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 92
• Issue: 1
• Article Number: 014008
• DOI: https://doi.org/10.1103/physrevd.92.014008
• Public URL: https://durham-repository.worktribe.com/output/1398972
• Related Public URLs: http://arxiv.org/abs/arXiv:1412.4775