272 research outputs found
In-medium modification and decay asymmetry of omega mesons in cold nuclear matter
We discuss an asymmetry of the decay in nuclear matter with
respect to the electron and positron energies. This asymmetry is sensitive to
the properties of the meson self-energy and, in particular, it has a
non-trivial dependence on the energy and momentum. Therefore, this
asymmetry may serve as a powerful tool in studying the properties of the
meson in the nuclear medium.Comment: 19 pages, 9 figure
Equation of State and Viscosities from a Gravity Dual of the Gluon Plasma
Employing new precision data of the equation of state of the SU(3) Yang-Mills
theory (gluon plasma) the dilaton potential of a gravity-dual model is adjusted
in the temperature range within a bottom-up approach. The ratio
of bulk viscosity to shear viscosity follows then as for and achieves a maximum value of
at , where is the
non-conformality measure and is the velocity of sound squared, while
the ratio of shear viscosity to entropy density is known as for
the considered set-up with Hilbert action on the gravity side.Comment: 19 pages, 13 figures. Version published in PL
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