Generic dijet soft functions at two-loop order: correlated emissions

Bell, Guido; Rahn, Rudi; Talbert, Jim

doi:10.1007/JHEP07(2019)101

Report/Journal Article

PUBDB-2019-02906

Generic dijet soft functions at two-loop order: correlated emissions

Bell, G. (Corresponding author) ; Rahn, R. ; Talbert, J.DESY*

2019
Springer Nature Cham

Journal of high energy physics 1907(07), 101 (2019) [10.1007/JHEP07(2019)101]

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Please use a persistent id in citations: doi:10.1007/JHEP07(2019)101 doi:10.3204/PUBDB-2019-02906

Report No.: DESY-18-209; arXiv:1812.08690

Abstract: We present a systematic algorithm for the perturbative computation of soft functions that are defined in terms of two light-like Wilson lines. Our method is based on a universal parametrisation of the phase-space integrals, which we use to isolate the singularities in Laplace space. The observable-dependent integrations can then be performed numerically, and they are implemented in the new, publicly available package SoftSERVE that we use to derive all of our numerical results. Our algorithm applies to both SCET-1 and SCET-2 soft functions, and in the current version it can be used to compute two out of three NNLO colour structures associated with the so-called correlated-emission contribution. We confirm existing two-loop results for about a dozen $e^+e^-$ and hadron-collider soft functions, and we obtain new predictions for the C-parameter as well as thrust-axis and broadening-axis angularities.

Classification:

ddc:530

Contributing Institute(s):

Theorie-Gruppe (T)

Research Program(s):

611 - Fundamental Particles and Forces (POF3-611) (POF3-611)

Experiment(s):

No specific instrument

Appears in the scientific report 2019

Database coverage:
Creative Commons Attribution CC BY 4.0

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