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dc.contributor.authorFeige, Ilya Eric Alexander
dc.contributor.authorSchwartz, Matthew D
dc.date.accessioned2016-11-08T22:12:30Z
dc.date.issued2013
dc.identifier.citationFeige, Ilya, and Matthew D. Schwartz. 2013. “An on-Shell Approach to Factorization.” Physical Review D 88 (6) (September 19). doi:10.1103/physrevd.88.065021.en_US
dc.identifier.issn1550-7998en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:29374832
dc.description.abstractFactorization is possible due to the universal behavior of Yang-Mills theories in soft and collinear limits. Here, we take a small step towards a more transparent understanding of these limits by proving a form of perturbative factorization at treelevel using on-shell spinor helicity methods. We present a concrete and self-contained expression of factorization in which matrix elements in QCD are related to products of other matrix elements in QCD up to leading order in a power-counting parameter determined by the momenta of certain physical on-shell states. Our approach uses only the scaling of momenta in soft and collinear limits, avoiding any assignment of scaling behavior to unphysical (and gauge-dependent) fields. The proof of factorization exploits many advantages of helicity spinors, such as the freedom to choose different reference vectors for polarizations in different collinear sectors. An advantage of this approach is that once factorization is shown to hold in QCD, the transition to SoftCollinear Effective Theory is effortless.en_US
dc.description.sponsorshipPhysicsen_US
dc.language.isoen_USen_US
dc.publisherAmerican Physical Society (APS)en_US
dc.relation.isversionofdoi:10.1103/PhysRevD.88.065021en_US
dc.relation.hasversionhttps://arxiv.org/abs/1306.6341en_US
dash.licenseOAP
dc.titleAn on-shell approach to factorizationen_US
dc.typeJournal Articleen_US
dc.description.versionAccepted Manuscripten_US
dc.relation.journalPhysical Review Den_US
dash.depositing.authorSchwartz, Matthew D
dc.date.available2016-11-08T22:12:30Z
dc.identifier.doi10.1103/PhysRevD.88.065021*
dash.contributor.affiliatedFeige, Ilya
dash.contributor.affiliatedSchwartz, Matthew


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