2026-06-07T19:38:52Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/437992024-09-04T14:04:54Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Dobado González, Antonio
author
Llanes Estrada, Felipe José
author
Torres Rincón, Juan Miguel
2023-06-20T03:32:30Z
2023-06-20T03:32:30Z
2009-12
1550-7998
10.1103/PhysRevD.80.114015
https://hdl.handle.net/20.500.14352/43799
http://prd.aps.org/abstract/PRD/v80/i11/e114015
http://prd.aps.org
We reexamine the possibility of employing the viscosity over entropy density ratio as a diagnostic tool to identify a Phase transition in hadron physics to the strongly coupled quark-gluon plasma and other circumstances where direct measurement of the order parameter or the free energy may be difficult. It has been conjectured that the minimum of eta/s does indeed occur at the phase transition. We now make a careful assessment in a controlled theoretical framework, the linear sigma model at large N, and indeed find that the minimum of eta/s occurs near the second-order phase transition of the model due to the rapid variation of the order parameter (here the sigma vacuum expectation value) at a temperature slightly smaller than the critical one.
eng
Minimum of eta/s and the phase transition of the linear sigma model in the large-N limit
journal article
URL
https://docta.ucm.es/bitstreams/b1963ac3-5812-4a9b-80e7-6d0c768cc6be/download
File
MD5
5d9bb8d232a8a7c7acc89a69f99b3655
1529803
application/pdf
DobadoAntonio014libre.pdf