### Abstract

Understanding of the transport properties of the the quark-gluon plasma is becoming increasingly important to describe current measurements at heavy ion collisions. This work reports on recent efforts to determine the shear viscosity η in the deconfined phase from lattice QCD. The main focus is on the integration of the Wilson flow in the analysis to get a better handle on the infrared behaviour of the spectral function which is relevant for transport. It is carried out at finite Wilson flow time, which eliminates the dependence on the lattice spacing. Eventually, a new continuum limit has to be carried out which sends the new regulator introduced by finite flow time to zero. Also the non-perturbative renormalization strategy applied for the energy momentum tensor is discussed. At the end some quenched results for temperatures up to 4.5T_{c} are presented.

Original language | English |
---|---|

Article number | 232 |

Journal | Proceedings of Science |

Volume | Part F130500 |

Publication status | Published - Jan 1 2014 |

Event | 32nd International Symposium on Lattice Field Theory, LATTICE 2014 - New York, United States Duration: Jun 23 2014 → Jun 28 2014 |

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### ASJC Scopus subject areas

- General

### Cite this

*Proceedings of Science*,

*Part F130500*, [232].

**Shear viscosity from lattice QCD.** / Borsányi, Szabolcs; Fodor, Z.; Mages, Simon; Schäfer, Andreas; Szabó, Kálmán K.

Research output: Contribution to journal › Conference article

*Proceedings of Science*, vol. Part F130500, 232.

}

TY - JOUR

T1 - Shear viscosity from lattice QCD

AU - Borsányi, Szabolcs

AU - Fodor, Z.

AU - Mages, Simon

AU - Schäfer, Andreas

AU - Szabó, Kálmán K.

PY - 2014/1/1

Y1 - 2014/1/1

N2 - Understanding of the transport properties of the the quark-gluon plasma is becoming increasingly important to describe current measurements at heavy ion collisions. This work reports on recent efforts to determine the shear viscosity η in the deconfined phase from lattice QCD. The main focus is on the integration of the Wilson flow in the analysis to get a better handle on the infrared behaviour of the spectral function which is relevant for transport. It is carried out at finite Wilson flow time, which eliminates the dependence on the lattice spacing. Eventually, a new continuum limit has to be carried out which sends the new regulator introduced by finite flow time to zero. Also the non-perturbative renormalization strategy applied for the energy momentum tensor is discussed. At the end some quenched results for temperatures up to 4.5Tc are presented.

AB - Understanding of the transport properties of the the quark-gluon plasma is becoming increasingly important to describe current measurements at heavy ion collisions. This work reports on recent efforts to determine the shear viscosity η in the deconfined phase from lattice QCD. The main focus is on the integration of the Wilson flow in the analysis to get a better handle on the infrared behaviour of the spectral function which is relevant for transport. It is carried out at finite Wilson flow time, which eliminates the dependence on the lattice spacing. Eventually, a new continuum limit has to be carried out which sends the new regulator introduced by finite flow time to zero. Also the non-perturbative renormalization strategy applied for the energy momentum tensor is discussed. At the end some quenched results for temperatures up to 4.5Tc are presented.

UR - http://www.scopus.com/inward/record.url?scp=85030096984&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85030096984&partnerID=8YFLogxK

M3 - Conference article

VL - Part F130500

JO - Proceedings of Science

JF - Proceedings of Science

SN - 1824-8039

M1 - 232

ER -