Show simple item record

dc.contributor.authorDavighi, Joseph
dc.contributor.authorMelville, Scott
dc.contributor.authorYou, T
dc.date.accessioned2022-05-27T16:08:37Z
dc.date.available2022-05-27T16:08:37Z
dc.date.issued2022-02-21
dc.date.submitted2021-08-30
dc.identifier.issn1029-8479
dc.identifier.otherjhep02(2022)167
dc.identifier.other17852
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/337558
dc.description.abstractWe derive new effective field theory (EFT) positivity bounds on the elastic $2\to2$ scattering amplitudes of massive spinning particles from the standard UV properties of unitarity, causality, locality and Lorentz invariance. By bounding the $t$ derivatives of the amplitude (which can be represented as angular momentum matrix elements) in terms of the total ingoing helicity, we derive stronger unitarity bounds on the $s$- and $u$-channel branch cuts which determine the dispersion relation. In contrast to previous positivity bounds, which relate the $t$-derivative to the forward-limit EFT amplitude with no $t$ derivatives, our bounds establish that the $t$-derivative alone must be strictly positive for sufficiently large helicities. Consequently, they provide stronger constraints beyond the forward limit and can be used to constrain dimension-6 interactions with a milder assumption about the high-energy growth of the UV amplitude.
dc.languageen
dc.publisherSpringer Science and Business Media LLC
dc.subjectRegular Article - Theoretical Physics
dc.subjectEffective Field Theories
dc.subjectScattering Amplitudes
dc.titleNatural selection rules: new positivity bounds for massive spinning particles
dc.typeArticle
dc.date.updated2022-05-27T16:08:36Z
prism.issueIdentifier2
prism.publicationNameJournal of High Energy Physics
prism.volume2022
dc.identifier.doi10.17863/CAM.84967
dcterms.dateAccepted2022-01-27
rioxxterms.versionofrecord10.1007/JHEP02(2022)167
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
dc.contributor.orcidDavighi, Joseph [0000-0003-1002-0972]
dc.contributor.orcidMelville, Scott [0000-0003-3516-856X]
dc.identifier.eissn1029-8479
dc.publisher.urlhttp://dx.doi.org/10.1007/JHEP02(2022)167
cam.issuedOnline2022-02-21
dc.identifier.arxiv2108.06334


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record