One-loop calculations in quantum field theory: From Feynman diagrams to unitarity cuts
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,...
| Main Authors: | , , , |
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| Format: | Journal article |
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2012
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| _version_ | 1797068362587570176 |
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| author | Ellis, R Kunszt, Z Melnikov, K Zanderighi, G |
| author_facet | Ellis, R Kunszt, Z Melnikov, K Zanderighi, G |
| author_sort | Ellis, R |
| collection | OXFORD |
| description | 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. © 2012 Elsevier B.V. |
| first_indexed | 2024-03-06T22:09:41Z |
| format | Journal article |
| id | oxford-uuid:515fe1af-7fc6-4c42-bc02-7c83f2c2693f |
| institution | University of Oxford |
| last_indexed | 2024-03-06T22:09:41Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:515fe1af-7fc6-4c42-bc02-7c83f2c2693f2022-03-26T16:19:07ZOne-loop calculations in quantum field theory: From Feynman diagrams to unitarity cutsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:515fe1af-7fc6-4c42-bc02-7c83f2c2693fSymplectic Elements at Oxford2012Ellis, RKunszt, ZMelnikov, KZanderighi, GThe 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. © 2012 Elsevier B.V. |
| spellingShingle | Ellis, R Kunszt, Z Melnikov, K Zanderighi, G One-loop calculations in quantum field theory: From Feynman diagrams to unitarity cuts |
| title | One-loop calculations in quantum field theory: From Feynman diagrams to unitarity cuts |
| title_full | One-loop calculations in quantum field theory: From Feynman diagrams to unitarity cuts |
| title_fullStr | One-loop calculations in quantum field theory: From Feynman diagrams to unitarity cuts |
| title_full_unstemmed | One-loop calculations in quantum field theory: From Feynman diagrams to unitarity cuts |
| title_short | One-loop calculations in quantum field theory: From Feynman diagrams to unitarity cuts |
| title_sort | one loop calculations in quantum field theory from feynman diagrams to unitarity cuts |
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