Nuclear Theory Seminars at Texas A&M: Spring & Fall 2015

Location: Cyclotron Conference Room (CYCL-300)

January 30, 4:00pm
      G. Lacroix (University of Mons, Mons, Belgium)
"Study of the Yang-Mills and Quark-Gluon Plasma Equations of State thanks to Quasiparticle Approaches"

Understanding QCD at finite temperature and baryonic potential is nowadays a fascinating topic. Indeed, from the experimental side, SPS, RHIC and LHC have pointed out several evidences of the existence of a deconfined matter: the Quark-Gluon Plasma (QGP).
From a theoretical point of view, studying the QCD phase diagram and all its implications is a challenging subject in itself and has motivated many approaches and developments. In particular, in this seminar, we will focus on two quasiparticle approaches and their comparisons with lattice QCD data.
In the first approach, the thermodynamics of the Yang-Mills matter in the confined phase is addressed thanks to a hadron resonance gas model. Its particularity is to obtain equations of state (EoS) for any gauge groups.
In the second approach, the Dashen, Ma and Bernstein formulation of statistical mechanics is used in order to produce EoS for QCD matter in the deconfined regime. This formulation has the advantage to formally take into account many-body interactions. In our developments, we limited ourself to two-body interactions; These latter being computed within a T-matrix formalism. Then, the thermodynamics of the Yang-Mills matter (for arbitrary gauge groups), the QGP and a supersymmetric medium with one supersymmetric generator have been studied.

September 11, 4:00pm      

Baoyi Chen (Tian-Jing University, China)
"Coupling between open/hidden charm with hot medium"

We will discuss medium effects of quark gluon plasma and hadron gas on charmonium, and show sensitivities of charmonium properties to the bulk medium. Within a Langevin equation, we discuss the evolution of charm thermalization and its effect on charmonium production.

October 02, 4:00pm
      Xingbo Zhao (Iowa State University)
"An introduction to Basis Light-front Quantization"

Basis Light-front Quantization (BLFQ) has recently been constructed as a non-perturbative approach to quantum field theory based on light-front quantization and Hamiltonian framework. In this method the mass eigenstates of quantum field systems are solved through the eigenvalue problem of the associated light-front Hamiltonian. The obtained eigenvectors, identified as the light-front wavefunctions, encode the full information on the structure of the associated mass eigenstates. In this talk I start with the basics of BLFQ followed by the applications to the single electron and positronium systems in QED and the heavy quarkonium system in QCD. Then I introduce a recent extension of BLFQ to time-dependent regime, namely, the time-dependent BLFQ (tBLFQ) approach, which is designed to solve for time-evolution of quantum field configurations. I will illustrate tBLFQ through the applications to strong field laser physics and to electron-heavy ion scattering. Finally I conclude with a “roadmap” summarizing our future plans.

Previous seminars

Fall 2014
Spring 2014
Spring 2013
Spring 2012
Fall 2011
Spring 2011
Fall 2010
Spring 2010
Fall 2009
Spring 2009
Fall 2008
Spring 2008
Fall 2007
Spring 2007
Fall 2006
Spring 2006
Fall 2005
Spring 2005
Fall 2004
Spring 2004
Fall 2003

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Last updated: Sept 10, 2015
Maintained by Ralf Rapp