Speaker
Hideaki Iida
(Hashimoto Mathematical Physics Laboratory, Nishina Center, RIKEN, Japan)
Description
Spatial meson correlators at finite temperature are studied on lattice QCD.
Two-flavor gauge configurations of 16^3*4 lattice with the RG improved
gluon action and the clover-improved Wilson quark action,
generated by WHOT-QCD collaboration, are employed [1].
The simulations are performed along the lines of constant physics,
on which the mass ratio of pseudo-scalar meson to vector meson,
m_{PS}/m_V, is kept constant.
The temperatures of the simulation in the unit of the pseudo-critical
temperature, T/T_{PC}, are in the range 0.76-4.0 for m_{PS}/m_V=0.65 and 0.80.
Screening masses of the mesons at finite temperature are extracted from
the spatial meson correlators.
Next, meson properties at finite temperature and density are
studied by using the Taylor expansion with respect to quark chemical potential.
Responses of spatial meson correlators to quark chemical potential
are calculated up to second order.
The shifts of meson screening masses due to medium effect are
obtained from the responses.
Based on these results, meson properties at finite temperature and
density are discussed.
Reference:
[1] Y.Maezawa et al. (WHOT-QCD Collaboration), Phys. Rev. D75, 074501 (2007).
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Primary author
Hideaki Iida
(Hashimoto Mathematical Physics Laboratory, Nishina Center, RIKEN, Japan)
Co-authors
Prof.
Koichi Yazaki
(Hashimoto Mathematical Physics Laboratory, Nishina Center, RIKEN, Japan)
Dr
Yu Maezawa
(Hashimoto Mathematical Physics Laboratory, Nishina Center, RIKEN, Japan)
