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dc.contributor.authorIlderton, A
dc.contributor.authorMacLeod, AJ
dc.date.accessioned2020-07-11T08:20:41Z
dc.date.available2020-07-11T08:20:41Z
dc.date.issued2020-04-14
dc.identifier.issn1029-8479
dc.identifier.issn1029-8479
dc.identifier.other78
dc.identifier.urihttp://hdl.handle.net/10026.1/16002
dc.description25 pages, 4 figures. V2: added references. V3: Updated to match published version appearing in JHEP [JHEP 04 (2020) 078]
dc.description.abstract

Gauge invariance and soft limits can be enough to determine the analytic structure of scattering amplitudes in certain theories. This prompts the question of how gauge invariance is connected to analytic structure in more general theories. Here we focus on QED in background plane waves. We show that imposing gauge invariance introduces new virtuality poles into internal momenta on which amplitudes factorise into a series of terms. Each term is gauge invariant, has a different analytic structure in external momenta, and exhibits a hard/soft factorisation. The introduced poles are dictated by infra-red behaviour, which allows us to extend our results to scalar Yukawa theory. The background is treated non-perturbatively throughout.

dc.format.extent78-
dc.languageen
dc.language.isoen
dc.publisherSpringer Science and Business Media LLC
dc.subjectGauge Symmetry
dc.subjectScattering Amplitudes
dc.titleThe analytic structure of amplitudes on backgrounds from gauge invariance and the infra-red
dc.typejournal-article
dc.typeArticle
plymouth.author-urlhttp://arxiv.org/abs/2001.10553v3
plymouth.issue4
plymouth.volume2020
plymouth.publisher-urlhttp://dx.doi.org/10.1007/JHEP04(2020)078
plymouth.publication-statusPublished
plymouth.journalJournal of High Energy Physics
dc.identifier.doi10.1007/jhep04(2020)078
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/EXTENDED UoA 10 - Mathematical Sciences
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA10 Mathematical Sciences
dcterms.dateAccepted2020-03-27
dc.rights.embargodate2020-7-29
dc.identifier.eissn1029-8479
dc.rights.embargoperiodNot known
rioxxterms.funderEngineering and Physical Sciences Research Council
rioxxterms.identifier.projectQuantum phenomena in high-intensity laser-matter interactions
rioxxterms.versionofrecord10.1007/jhep04(2020)078
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2020-04-14
rioxxterms.typeJournal Article/Review
plymouth.funderQuantum phenomena in high-intensity laser-matter interactions::Engineering and Physical Sciences Research Council


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