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dc.contributorEscuela de Ingenierias Industrial, Informática y Aeroespaciales_ES
dc.contributor.authorBettoni, Dario 
dc.contributor.authorZumalacárregui, Miguel
dc.contributor.otherDidactica de la Matematicaes_ES
dc.date2015-05-11
dc.date.accessioned2024-04-09T07:44:45Z
dc.date.available2024-04-09T07:44:45Z
dc.identifier.citationBettoni, D., & Zumalacárregui, M. (2015). Shaken, not stirred: kinetic mixing in scalar-tensor theories of gravity. Physical Review D, 91(10), 104009. arXiv:1502.02666v3es_ES
dc.identifier.issn1550-7998
dc.identifier.urihttps://hdl.handle.net/10612/19557
dc.description.abstract[EN] Kinetic mixing between the metric and scalar degrees of freedom is an essential ingredient in contemporary scalar-tensor theories. This often makes it hard to understand their physical content, especially when derivative mixing is present, as is the case for Horndeski action. In this work we develop a method that allows us to write a Ricci-curvature-free scalar field equation, and we discuss some of the advantages of such a rephrasing in the study of stability issues in the presence of matter, the existence of an Einstein frame, and the generalization of the disformal screening mechanism. For quartic Horndeski theories, such a procedure leaves, in general, a residual coupling to the curvature, given by the Weyl tensor. This gives rise to a binary classification of scalar-tensor theories into stirred theories, in which the curvature can be substituted, and shaken theories, in which a residual coupling to the curvature remains. Quite remarkably, we have found that generalized Dirac-Born-Infeld Galileons belong to the first class. Finally, we discuss kinetic mixing in quintic theories, in which nonlinear mixing terms appear, and in the recently proposed theories beyond Horndeski that display a novel form of kinetic mixing, in which the field equation is sourced by derivatives of the energy-momentum tensor.es_ES
dc.languageenges_ES
dc.publisherAmerican Physical Societyes_ES
dc.subjectFísicaes_ES
dc.subject.otherTeorías escalar-tensorialeses_ES
dc.subject.otherCosmologíaes_ES
dc.subject.otherFísica Teóricaes_ES
dc.titleShaken, not stirred: Kinetic mixing in scalar-tensor theories of gravityes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.identifier.doi10.1103/PhysRevD.91.104009
dc.description.peerreviewedSIes_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES
dc.identifier.essn1550-2368
dc.journal.titlePhysical Review Des_ES
dc.volume.number91es_ES
dc.issue.number10es_ES
dc.type.hasVersioninfo:eu-repo/semantics/acceptedVersiones_ES
dc.subject.unesco2101 Cosmología y Cosmogoníaes_ES


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