Equation of state in (2+1)-flavor QCD at physical point with improved Wilson fermion action using gradient flow
Center for Integrated Research in Fundamental Science and Engineering (CiRfSE), University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
2 Department of Physics, Niigata University, Niigata, Niigata 950-2181, Japan
3 Track Maintenance of Shinkansen, Rail Maintenance 1st Department, East Japan Railway Company Niigata Branch, Niigata, Niigata 950-0086, Japan
4 Department of Physics, Osaka University, Osaka, Osaka 560-0043, Japan
5 J-PARC Branch, KEK Theory Center, Institute of Particle and Nuclear Studies, KEK, 203-1, Shirakata, Tokai, Ibaraki 319-1106, Japan
6 Department of Physics, Kyushu University, 744 Motooka, Fukuoka, Fukuoka 819-0395, Japan
7 Center for Computational Sciences (CCS), University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
8 Graduate School of Education, Hiroshima University, Higashihiroshima, Hiroshima 739-8524, Japan
* Speaker, e-mail: firstname.lastname@example.org, present address: Tomonaga Center for the History of the Universe, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
Published online: 26 March 2018
We study the energy-momentum tensor and the equation of state as well as the chiral condensate in (2+1)-flavor QCD at the physical point applying the method of Makino and Suzuki based on the gradient flow. We adopt a nonperturbatively O(a)- improved Wilson quark action and the renormalization group-improved Iwasaki gauge action. At Lattice 2016, we have presented our preliminary results of our study in (2+1)- flavor QCD at a heavy u; d quark mass point. We now extend the study to the physical point and perform finite-temperature simulations in the range T ≃ 155.544 MeV (Nt = 4-14 including odd Nt’s) at a ≃ 0:09 fm. We show our final results of the heavy QCD study and present some preliminary results obtained at the physical point so far.
© The Authors, published by EDP Sciences, 2018
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