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Title: New Tools for Forecasting Old Physics at the LHC

Abstract

For the LHC to uncover many types of new physics, the "old physics" produced by the Standard Model must be understood very well. For decades, the central theoretical tool for this job was the Feynman diagram expansion. However, Feynman diagrams are just too slow, even on fast computers, to allow adequate precision for complicated LHC events with many jets in the final state. Such events are already visible in the initial LHC data. Over the past few years, alternative methods to Feynman diagrams have come to fruition. These new "on-shell" methods are based on the old principles of unitarity and factorization. They can be much more efficient because they exploit the underlying simplicity of scattering amplitudes, and recycle lower-loop information. I will describe how and why these methods work, and present some of the recent state-of-the-art results that have been obtained with them.

Authors:
Publication Date:
OSTI Identifier:
1025951
Resource Type:
Multimedia
Country of Publication:
CERN
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; LHC; COLLIDER; LOOP AMPLITUDES; NEW PHYSICS

Citation Formats

Dixon, Lance. New Tools for Forecasting Old Physics at the LHC. CERN: N. p., 2011. Web.
Dixon, Lance. New Tools for Forecasting Old Physics at the LHC. CERN.
Dixon, Lance. Fri . "New Tools for Forecasting Old Physics at the LHC". CERN. https://www.osti.gov/servlets/purl/1025951.
@article{osti_1025951,
title = {New Tools for Forecasting Old Physics at the LHC},
author = {Dixon, Lance},
abstractNote = {For the LHC to uncover many types of new physics, the "old physics" produced by the Standard Model must be understood very well. For decades, the central theoretical tool for this job was the Feynman diagram expansion. However, Feynman diagrams are just too slow, even on fast computers, to allow adequate precision for complicated LHC events with many jets in the final state. Such events are already visible in the initial LHC data. Over the past few years, alternative methods to Feynman diagrams have come to fruition. These new "on-shell" methods are based on the old principles of unitarity and factorization. They can be much more efficient because they exploit the underlying simplicity of scattering amplitudes, and recycle lower-loop information. I will describe how and why these methods work, and present some of the recent state-of-the-art results that have been obtained with them.},
doi = {},
journal = {},
number = ,
volume = ,
place = {CERN},
year = {2011},
month = {1}
}

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