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22-28 July 2018
Kellogg Hotel and Conference Center
EST timezone

Study of energy-momentum tensor correlation function in Nf=2+1 full QCD for QGP viscosities

Jul 26, 2018, 9:10 AM
20m
Centennial (Kellogg Hotel and Conference Center)

Centennial

Kellogg Hotel and Conference Center

219 S Harrison Rd, East Lansing, MI 48824
Nonzero Temperature and Density Nonzero Temperature and Density

Speaker

Prof. Yusuke Taniguchi (University of Tsukuba)

Description

We study correlation functions of the energy-momentum (EM) tensor in Nf=2+1 full QCD for the sake of QGP viscosities. The viscosity is given by three steps on lattice: (1) calculate two point correlation functions of the energy-momentum tensor, (2) derive the spectral function from the correlation function, (3) applying the Kubo's formula the viscosity is related to the spectral function. However the first two steps have severe difficulties. By applying the gradient flow we solve the difficulty in the first step that the EM tensor cannot be defined as a conserved current on lattice and give a non-perturbatively renormalized EM tensor. We calculate the correlation functions of the EM tensor and try to extract the shear viscosity through the spectral function.

Primary author

Prof. Yusuke Taniguchi (University of Tsukuba)

Co-authors

Mr Asobu Suzuki (University of Tsukuba) Mr Atsushi Baba (University of Tsukuba) Prof. Hiroshi Suzuki (Kyushu University) Prof. Kazuyuki Kanaya (University of Tsukuba) Prof. Masakiyo Kitazawa (Osaka University) Prof. Shinji Ejiri (Niigata University) Mr Takanori Shimojo (Kyushu University) Prof. Takashi Umeda (Hiroshima University)

Presentation Materials