| Sum rules for light-by-light scattering. | |
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MedLine Citation:
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PMID: 21231218 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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We derive a set of sum rules for the light-by-light scattering and fusion: γγ→all, and verify them in lowest order QED calculations. A prominent implication of these sum rules is the superconvergence of the helicity-difference total cross section for photon fusion, which in the hadron sector reveals an intricate cancellation between the pseudoscalar and tensor mesons. An experimental verification of superconvergence of the polarized photon fusion into hadrons is called for, but will only be possible at e+ e- and γγ colliders with both beams polarized. We also show how the sum rules can be used to measure various contributions to the low-energy light-by-light scattering. |
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Authors:
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Vladimir Pascalutsa; Marc Vanderhaeghen |
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Publication Detail:
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Type: Journal Article Date: 2010-11-12 |
Journal Detail:
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Title: Physical review letters Volume: 105 ISSN: 1079-7114 ISO Abbreviation: Phys. Rev. Lett. Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2011-01-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0401141 Medline TA: Phys Rev Lett Country: United States |
Other Details:
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Languages: eng Pagination: 201603 Citation Subset: - |
Affiliation:
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Institut für Kernphysik, Johannes Gutenberg Universität, Mainz D-55099, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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