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Meson Thermalizationin AdS/CFT Correspondence
, M.Sc. Thesis Sharif University of Technology ; Arfaie, Hesameddin (Supervisor) ; Ali-Akbari, Mohammad (Supervisor)
Abstract
AdS/CFT correspondence is a suitable framework for studying strongly coupled gauge theories. It corresponds a strongly coupled gauge theory to a classical gravity theory with an extra dimension. Quark-gluon plasma which is produced in accelerators is strongly coupled. We use AdS/CFT correspondence to calculate Meson thermalization time by approximating the collisions by a sudden change of baryon number chemical potential. On the gravity side, this is followed with an apparent horizon formation on probe-brane which is the signal of thermalization
Charge Asymmetry as a Tool to Probe Dark Matter at Large Hadron Collider, LHC
, M.Sc. Thesis Sharif University of Technology ; Arfaie, Hesameddin (Supervisor) ; Mohammadi Najafabadi, Mojtaba (Supervisor)
Abstract
Today, many evidences, including the distribution of galactic velocities, gravitational lensing observations, and the cosmic microwave background, show that there exist dark matter (non-baryon matter) in large-scale cosmological structures that are stable, free of charge and without color, which has gravitational interaction like normal matter. The hypothesis that weakly interacting massive particles (WIMPs) as a dark matter candidate with mass range of several tens of GeV to several teV and with the typical couplings of Electroweak order of magnitude, is an attractive and desirable model, Which naturally explains the density of cosmic dark matter in agreement with observations. Alongside...