期刊
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
卷 518, 期 4-5, 页码 141-250出版社
ELSEVIER
DOI: 10.1016/j.physrep.2012.01.008
关键词
QCD; Perturbation theory; Helicity amplitudes; Precision calculations; LHC
资金
- NSF [PHY-0855365]
- British Science and Technology Council
- LHCPhenoNet network [PITN-GA-2010-264564]
- European Research and Training Network (RTN) grant Unification in the LHC ERA [PITN-GA-2009-237920]
- Science and Technology Facilities Council [ST/J000507/1] Funding Source: researchfish
- STFC [ST/J000507/1] Funding Source: UKRI
The success of the experimental program at the Tevatron re-inforced the idea that precision physics at hadron colliders is desirable and, indeed, possible. The Tevatron data strongly suggests that one-loop computations in QCD describe hard scattering well. Extrapolating this observation to the LHC, we conclude that knowledge of many short-distance processes at next-to-leading order may be required to describe the physics of hard scattering. While the field of one-loop computations is quite mature, parton multiplicities in hard LHC events are so high that traditional computational techniques become inefficient. Recently, new approaches based on unitarity have been developed for calculating one-loop scattering amplitudes in quantum field theory. These methods are especially suitable for the description of multi-particle processes in QCD and are amenable to numerical implementations. We present a systematic pedagogical description of both conceptual and technical aspects of the new methods. (c) 2012 Elsevier B.V. All rights reserved.
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