Toward a more realistic holographic QCD model

By matching the $Dp-Dq$ system in type II superstring theory with the Regge trajectories of vector and axial-vector meson spectra, a possible 5-dimension metric of a $Dp-Dq$ soft-wall model has been determined. The dependence of the metric parameters on Regge trajectory parameters has been demonstrated. It is shown that the models defined in $Dp$ brane background for $p=3$ or 4 can be consistent with experimental data.Comment: 8 pages, proceedings for the YITP International Symposium "Fundamental Problems in Hot and/or Dense QCD", March 3-6, 2008, Kyoto, Japa

Sigma meson and lowest possible glueball candidate in an extended linear σ\sigma model

We formulate an extended linear $\sigma$ model of a quarkonia nonet and a tetraquark nonet as well as a complex iso-singlet (glueball) field to study the low-lying scalar meson. Chiral symmetry and $U_A(1)$ symmetry and their breaking play important role to shape the scalar meson spectrum in our work. Based on our study we will comment on what may be the mass of the lowest possible scalar and pseudoscalar glueball states. We will also discuss on what may be the nature of the sigma or $f_0(600)$ meson.Comment: Contribution to the Proceedings of QCD@work 2012, Lecce, Italy, 18-21 June 2012, 5 pages, 2 figure

Traduciendo el feminismo : Taiwán, Spivak, A-Wu

Este artículo establece un diálogo entre las propuestas de Gayatri Spivak y las de la feminista taiwanesa A-Wu. Exponiendo las tensiones existentes dentro de los feminismos taiwaneses y su relación y negociación con las presiones imperialistas que configuran la identidad de la isla, la autora propone vías para una crítica recíproca entre grupos feministas que logre negociar productivamente con la universalización e intraducibilidad en cuyo marco tienen lugar los encuentros feministas transnacionales

Lifshitz holographic superconductor in Horava-Lifshitz gravity

We study the holographic phase transition of superconductor dual to a Lifshitz black brane probed by an anisotropic scalar field in the probe limit in Ho\u{r}ava-Lifshitz gravity. With the use of numerical and analytical method, we investigate how the critical temperature of the condensation is affected by the Lifshitz exponent $z$, $\alpha-$correction term in the action as well as the dimensions of the gravity. We also numerically explore the condensation of the dual operator and optical conductivity of the holographic system. Various interesting properties of the holographic condensation affected by the parameters of model are discussed