Soft gluon resummation in the signal-background interference process of gg(→ h∗) → ZZ

• Published in: The journal of high energy physics Vol. 2015; no. 8; p. 1
• Main Authors: Li, Chong Sheng, Li, Hai Tao, Shao, Ding Yu, Wang, Jian
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.08.2015; Springer Nature B.V
• Subjects: Classical and Quantum Gravitation; Elementary Particles; High energy physics; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Regular Article - Theoretical Physics; Relativity Theory; String Theory; Higgs Physics; Resummation; QCD
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP08(2015)065

A bstract We present a precise theoretical prediction for the signal-background interference process of gg (→ h ∗ ) → ZZ , which is useful to constrain the Higgs boson decay width and to measure Higgs couplings to the SM particles. The approximate NNLO K -factor is in the range of 2 . 05 − 2 . 45 (1 . 85 − 2 . 25), depending on M ZZ , at the 8 (13) TeV LHC. And the soft gluon resummation can increase the approximate NNLO result by about 10% at both the 8 TeV and 13 TeV LHC. The theoretical uncertainties including the scale, uncalculated multi-loop amplitudes of the background and PDF+α s are roughly O 10 % at NNLL ′ . We also confirm that the approximate K -factors in the interference and the pure signal processes are the same.