Chern-Simons diffusion rate across different phase transitions
dc.contributor.author | Rougemont, Romulo | |
dc.contributor.author | Finazzo, Stefano Ivo | |
dc.contributor.institution | Universidade de São Paulo (USP) | |
dc.contributor.institution | Universidade Do Estado de São Paulo | |
dc.date.accessioned | 2022-04-29T08:44:59Z | |
dc.date.available | 2022-04-29T08:44:59Z | |
dc.date.issued | 2016-05-24 | |
dc.description.abstract | We 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.affiliation | Instituto de Física Universidade de São Paulo, Rua do Matão, 1371 | |
dc.description.affiliation | Instituto de Física Teórica Universidade Do Estado de São Paulo, Rua Dr. Bento T. Ferraz, 271 | |
dc.identifier | http://dx.doi.org/10.1103/PhysRevD.93.106005 | |
dc.identifier.citation | Physical Review D, v. 93, n. 10, 2016. | |
dc.identifier.doi | 10.1103/PhysRevD.93.106005 | |
dc.identifier.issn | 2470-0029 | |
dc.identifier.issn | 2470-0010 | |
dc.identifier.scopus | 2-s2.0-84971320790 | |
dc.identifier.uri | http://hdl.handle.net/11449/231374 | |
dc.language.iso | eng | |
dc.relation.ispartof | Physical Review D | |
dc.source | Scopus | |
dc.title | Chern-Simons diffusion rate across different phase transitions | en |
dc.type | Artigo |