Factorization and resummation for jet processes

Becher, Thomas; Neubert, Matthias; Rothen, Lorena; Shao, Dingyu (2016). Factorization and resummation for jet processes. Journal of High Energy Physics, 2016(11), pp. 1-61. Springer 10.1007/JHEP11(2016)019

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From a detailed analysis of cone-jet cross sections in effective field theory, we obtain novel factorization theorems which separate the physics associated with different energy scales present in such processes. The relevant low-energy physics is encoded in Wilson lines along the directions of the energetic particles inside the jets. This multi-Wilson-line structure is present even for narrow-cone jets due to the relevance of small-angle soft radiation. We discuss the renormalization-group equations satisfied by these operators. Their solution resums all logarithmically enhanced contributions to such processes, including non-global logarithms. Such logarithms arise in many observables, in particular whenever hard phase-space constraints are imposed, and are not captured with standard resummation techniques. Our formalism provides the basis for higher-order logarithmic resummations of jet and other non-global observables. As a nontrivial consistency check, we use it to obtain explicit two-loop results for all logarithmically enhanced terms in cone-jet cross sections and verify those against numerical fixed-order computations.

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:

Becher, Thomas; Rothen, Lorena and Shao, Dingyu

Subjects:

500 Science > 530 Physics

ISSN:

1029-8479

Publisher:

Springer

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

23 Jan 2017 17:23

Last Modified:

04 Jun 2017 02:11

Publisher DOI:

10.1007/JHEP11(2016)019

ArXiv ID:

1605.02737

BORIS DOI:

10.7892/boris.91495

URI:

https://boris.unibe.ch/id/eprint/91495

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