Show simple item record

dc.contributor.authorRodríguez Chala, Mikael 
dc.contributor.authorSantiago Pérez, José
dc.identifier.citationChala, M., & Santiago, J. (2022). Positivity bounds in the Standard Model effective field theory beyond tree level. Physical Review D, 105(11), L111901. DOI: [10.1103/PhysRevD.105.L111901]es_ES
dc.description.abstractFocusing on four-Higgs interactions, we analyze the robustness of tree-level-derived positivity bounds on standard model effective field theory (SMEFT) operators under quantum corrections. Among other results, we demonstrate that: (i) Even in the simplest extensions of the Standard Model, e.g., with one new scalar singlet or with a neutral triplet, some positivity bounds are strictly violated; (ii) the mixing of the dimension-eight operators under renormalization, which we compute here for the first time, can drive them out of their positivity region; (iii) the running of the dimension-eight interactions triggered by solely dimension-six terms respects the positivity bounds. Our results suggest, on one hand, that departures from positivity within the SMEFT, if ever found in the data, do not necessarily imply the breaking of unitarity or causality, nor the presence of new light degrees of freedom. On the other hand, they lead to strong constraints on the form of certain anomalous dimensions.es_ES
dc.description.sponsorshipSpanish Government PID2019 - 106087 GB-C21/C22es_ES
dc.description.sponsorshipJunta de Andaluciaes_ES
dc.description.sponsorshipEuropean Commission FQM 101 A-FQM-211-UGR18 P18-FR-4314es_ES
dc.description.sponsorshipSpanish Governmentes_ES
dc.publisherAmerican Physical Societyes_ES
dc.rightsAtribución 4.0 Internacional*
dc.titlePositivity bounds in the standard model effective field theory beyond tree leveles_ES

Files in this item


This item appears in the following Collection(s)

Show simple item record

Atribución 4.0 Internacional
Except where otherwise noted, this item's license is described as Atribución 4.0 Internacional