| Article | |
| Report number | arXiv:1803.07045 ; CERN-TH-2018-187 |
| Title | Non-global logarithms in jet and isolation cone cross sections |
| Author(s) | Balsiger, Marcel (U. Bern, AEC) ; Becher, Thomas (U. Bern, AEC) ; Shao, Ding Yu (CERN) |
| Publication | 2018-08-17 |
| Imprint | 2018-03-19 |
| Number of pages | 39 |
| Note | 39 pages, 13 figures. v2: journal version with new result (4.18) for narrow isolation cones |
| In: | JHEP 08 (2018) 104 |
| DOI | 10.1007/JHEP08(2018)104 |
| Subject category | hep-ph ; Particle Physics - Phenomenology |
| Abstract | 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-$N_c$ 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. |
| Copyright/License | publication: (License: CC-BY-4.0) preprint: (License: arXiv nonexclusive-distrib 1.0) |
Corresponding record in: Inspire
Element opprettet 2018-04-06, sist endret 2021-11-12