Soft evolution of multi-jet final states
Name
Gerwick-2015-Soft evolution of mu.pdf
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1.34 MB
Format
Adobe PDF
Checksum (MD5)
1073506143f8f0ba2f8d1530f6e7e986
Author(s)
Gerwick, Erik
Schumann, Steffen
Höche, Stefan
Marzani, Simone
Date Issued
February 2015
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag
Citation
Gerwick, Erik, Steffen Schumann, Stefan Höche, and Simone Marzani. “Soft Evolution of Multi-Jet Final States.” J. High Energ. Phys. 2015, no. 2 (February 2015).
Version
Final published version
Abstract
We present a new framework for computing resummed and matched distributions in processes with many hard QCD jets. The intricate color structure of soft gluon emission at large angles renders resummed calculations highly non-trivial in this case. We automate all ingredients necessary for the color evolution of the soft function at next-to-leading-logarithmic accuracy, namely the selection of the color bases and the projections of color operators and Born amplitudes onto those bases. Explicit results for all QCD processes with up to 2 → 5 partons are given. We also devise a new tree-level matching scheme for resummed calculations which exploits a quasi-local subtraction based on the Catani-Seymour dipole formalism. We implement both resummation and matching in the Sherpa event generator. As a proof of concept, we compute the resummed and matched transverse-thrust distribution for hadronic collisions.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1007/jhep02(2015)106
