9,334 research outputs found
Lattice QCD thermodynamics at finite chemical potential and its comparison with Experiments
We compare higher moments of baryon numbers measured at the RHIC heavy ion
collision experiments with those by the lattice QCD calculations. We employ the
canonical approach, in which we can access the real chemical potential regions
avoiding the sign problem. In the lattice QCD simulations, we study several
fits of the number density in the pure imaginary chemical potential, and
analyze how these fits affects behaviors at the real chemical potential. In the
energy regions between =19.6 and 200 GeV, the susceptibility
calculated at is consistent with experimental data at , while the kurtosis shows similar behavior with that of the
experimental data in the small regions . The
experimental data at 11.5 shows quite different behavior. The
lattice result in the deconfinement region,, is far from
experimental data
Temperature dependence of the axial magnetic effect in two-color quenched QCD
The Axial Magnetic Effect is the generation of an equilibrium dissipationless
energy flow of chiral fermions in the direction of the axial (chiral) magnetic
field. At finite temperature the dissipationless energy transfer may be
realized in the absence of any chemical potentials. We numerically study the
temperature behavior of the Axial Magnetic Effect in quenched SU(2) lattice
gauge theory. We show that in the confinement (hadron) phase the effect is
absent. In the deconfinement transition region the conductivity quickly
increases, reaching the asymptotic behavior in a deep deconfinement
(plasma) phase. Apart from an overall proportionality factor, our results
qualitatively agree with theoretical predictions for the behavior of the energy
flow as a function of temperature and strength of the axial magnetic field.Comment: 5 pages, 1 figur
Study of lattice QCD at finite baryon density using the canonical approach
At finite baryon density lattice QCD first-principle calculations can not be
performed due to the sign problem. In order to circumvent this problem, we use
the canonical approach, which provides reliable analytical continuation from
the imaginary chemical potential region to the real chemical potential region.
We briefly present the canonical partition function method, describe our
formulation, and show the results, obtained for two temperatures: and in lattice QCD with two flavors of improved Wilson
fermions.Comment: 8 pages, 4 figures, Contribution to XIIth Quark Confinement and the
Hadron Spectru
Lattice QCD at finite baryon density using analytic continuation
We simulate lattice QCD with two flavors of Wilson fermions at imaginary
baryon chemical potential. Results for the baryon number density computed in
the confining and deconfining phases at imaginary baryon chemical potential are
used to determine the baryon number density and higher cumulants at the real
chemical potential via analytical continuation.Comment: 8 pages, 8 figures, Contribution to ICNFP2017, to be published in EPJ
Web of Conference
A Derivation of Three-Dimensional Inertial Transformations
The derivation of the transformations between inertial frames made by
Mansouri and Sexl is generalised to three dimensions for an arbitrary direction
of the velocity. Assuming lenght contraction and time dilation to have their
relativistic values, a set of transformations kinematically equivalent to
special relativity is obtained. The ``clock hypothesis'' allows the derivation
to be extended to accelerated systems. A theory of inertial transformations
maintaining an absolute simultaneity is shown to be the only one logically
consistent with accelerated movements. Algebraic properties of these
transformations are discussed. Keywords: special relativity, synchronization,
one-way velocity of light, ether, clock hypothesis.Comment: 16 pages (A5), Latex, one figure, to be published in Found. Phys.
Lett. (1997
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