Chern-Simons diffusion rate across different phase transitions

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dc.contributor.authorRougemont, Romulo
dc.contributor.authorFinazzo, Stefano Ivo
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Do Estado de São Paulo
dc.date.accessioned2022-04-29T08:44:59Z
dc.date.available2022-04-29T08:44:59Z
dc.date.issued2016-05-24
dc.description.abstractWe investigate how the dimensionless ratio given by the Chern-Simons diffusion rate ΓCS divided by the product of the entropy density s and temperature T behaves across different kinds of phase transitions in the class of bottom-up nonconformal Einstein-dilaton holographic models originally proposed by Gubser and Nellore. By tuning the dilaton potential, one is able to holographically mimic a first order, a second order, or a crossover transition. In a first order phase transition, ΓCS/sT jumps at the critical temperature (as previously found in the holographic literature), while in a second order phase transition it develops an infinite slope. On the other hand, in a crossover, ΓCS/sT behaves smoothly, although displaying a fast variation around the pseudo-critical temperature. In all the cases, ΓCS/sT increases with decreasing T. The behavior of the Chern-Simons diffusion rate across different phase transitions is expected to play a relevant role for the chiral magnetic effect around the QCD critical end point, which is a second order phase transition point connecting a crossover band to a line of first order phase transition. Our findings in the present work add to the literature the first predictions for the Chern-Simons diffusion rate across second order and crossover transitions in strongly coupled nonconformal, non-Abelian gauge theories.en
dc.description.affiliationInstituto de Física Universidade de São Paulo, Rua do Matão, 1371
dc.description.affiliationInstituto de Física Teórica Universidade Do Estado de São Paulo, Rua Dr. Bento T. Ferraz, 271
dc.identifierhttp://dx.doi.org/10.1103/PhysRevD.93.106005
dc.identifier.citationPhysical Review D, v. 93, n. 10, 2016.
dc.identifier.doi10.1103/PhysRevD.93.106005
dc.identifier.issn2470-0029
dc.identifier.issn2470-0010
dc.identifier.scopus2-s2.0-84971320790
dc.identifier.urihttp://hdl.handle.net/11449/231374
dc.language.isoeng
dc.relation.ispartofPhysical Review D
dc.sourceScopus
dc.titleChern-Simons diffusion rate across different phase transitionsen
dc.typeArtigo

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