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The triple collinear limit of one-loop QCD amplitudes
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The triple collinear limit of one-loop QCD amplitudes
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| dc.contributor.author | Catani, Stefano | |
| dc.contributor.author | de Florian, Daniel | |
| dc.contributor.author | Rodrigo García, Germán Vicente | |
| dc.date.accessioned | 2015-06-18T11:44:24Z | |
| dc.date.available | 2015-06-18T11:44:24Z | |
| dc.date.issued | 2004 | |
| dc.identifier.citation | Catani, Stefano de Florian, Daniel Rodrigo García, Germán Vicente 2004 The triple collinear limit of one-loop QCD amplitudes Physics Letters B 586 3-4 323 331 | |
| dc.identifier.uri | http://hdl.handle.net/10550/44449 | |
| dc.description.abstract | We consider the singular behaviour of one-loop QCD matrix elements when several external partons become simultaneously parallel. We present a new factorization formula that describes the singular collinear behaviour directly in colour space. The collinear singularities are embodied in process-independent splitting matrices that depend on the momenta, flavours, spins and colours of the collinear partons. We give the general structure of the infrared and ultraviolet divergences of the one-loop splitting matrices. We also present explicit one-loop results for the triple collinear splitting, q→qQ¯Q, of a quark and a quark--antiquark pair of different flavours. The one-loop triple collinear splitting is one of the ingredients that can be used to compute the evolution of parton distributions at the next-to-next-to-leading order in QCD perturbation theory. | |
| dc.language.iso | eng | |
| dc.relation.ispartof | Physics Letters B, 2004, vol. 586, num. 3-4, p. 323-331 | |
| dc.subject | Física | |
| dc.title | The triple collinear limit of one-loop QCD amplitudes | |
| dc.type | journal article | es_ES |
| dc.date.updated | 2015-06-18T11:44:24Z | |
| dc.identifier.doi | 10.1016/j.physletb.2004.02.039 | |
| dc.identifier.idgrec | 072221 | |
| dc.rights.accessRights | open access | es_ES |
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