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dc.contributor.authorCriado, Juan Carlos
dc.contributor.authorDjouadi, Abdelhak
dc.identifier.citationJ.C. Criado, A. Djouadi, N. Koivunen et al. Confronting spin-3/2 and other new fermions with the muon g-2 measurement. Physics Letters B 820 (2021) 136491. []es_ES
dc.descriptionThis work was supported by the Estonian Research Council grants MOBTTP135 , PRG803 , MOBTT5 , MOBJD323 and MOBTT86 , and by the EU through the European Regional Development Fund CoE program TK133 “The Dark Side of the Universe.” J.C.C. is supported by the STFC under grant ST/P001246/1 , and A.D. is also supported by the Junta de Andalucía through the Talentia Senior program as well as by A-FQM-211-UGR18 , P18-FR-4314 with ERDF.es_ES
dc.description.abstractThe new measurement of the muon's anomalous magnetic moment released by the Muon g-2 experiment at Fermilab sets strong constraints on the properties of many new particles. Using an effective field theory approach to the interactions of higher-spin fields, we evaluate the contribution of an electrically neutral and colour singlet spin-3/2 fermion to (g−2)μ and derive the corresponding constraints on its mass and couplings. These constraints are then compared with the ones on spin-1/2 fermions, such as the vector-like leptons that are predicted by various extensions of the Standard Model, the excited leptons which appear in composite models, as well as the charginos and neutralinos of supersymmetric theories. Unlike these new spin-1/2 fermions, the spin-3/2 particles generate only small contributions to the muon anomalous magnetic moment unless the effective new physics scale is very close to the electroweak scale.es_ES
dc.description.sponsorshipScience and Technology Facilities Council ST/P001246/1es_ES
dc.description.sponsorshipEuropean Commissiones_ES
dc.description.sponsorshipEesti Teadusagentuur MOBJD323, MOBTT86, MOBTTP135, PRG803es_ES
dc.description.sponsorshipEuropean Regional Development Fund TK133es_ES
dc.description.sponsorshipJunta de Andalucía A-FQM-211-UGR18, P18-FR-4314es_ES
dc.rightsAtribución 3.0 España*
dc.titleConfronting spin-3/2 and other new fermions with the muon g-2 measurementes_ES

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