Non-global logarithms in jet and isolation cone cross sections

Balsiger, Marcel; Becher, Thomas; Shao, Dingyu (2018). Non-global logarithms in jet and isolation cone cross sections. Journal of High Energy Physics, 2018(8) Springer 10.1007/JHEP08(2018)104

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Starting from a factorization theorem in effective field theory, we derive a parton-shower equation for the resummation of non-global logarithms. We have implemented this shower and interfaced it with a tree-level event generator to obtain an automated framework to resum the leading logarithm of non-global observables in the large-Nc limit. Using this setup, we compute gap fractions for dijet processes and isolation cone cross sections relevant for photon production. We compare our results with fixed-order computations and LHC measurements. We find that naive exponentiation is often not adequate, especially when the vetoed region is small, since non-global contributions are enhanced due to their dependence on the veto-region size. Since our parton shower is derived from first principles and based on renormalization-group evolution, it is clear what ingredients will have to be included to perform resummations at subleading logarithmic accuracy in the future.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Balsiger, Marcel; Becher, Thomas and Shao, Dingyu

Subjects:

500 Science > 530 Physics

ISSN:

1029-8479

Publisher:

Springer

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

30 Aug 2018 15:39

Last Modified:

16 Nov 2020 12:18

Publisher DOI:

10.1007/JHEP08(2018)104

ArXiv ID:

1803.07045

BORIS DOI:

10.7892/boris.119658

URI:

https://boris.unibe.ch/id/eprint/119658

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