[Todos] RECORDATORIO / JUEVES 7 DE JULIO: SEMINARIO IFLP/DEPARTAMENTO DE FÍSICA

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> SEMINARIO DEL IFLP Y DEL DEPARTAMENTO DE FÍSICA 
> 
> JUEVES 7 DE JULIO 
> 
> 15HS. AULA CHICA 
> 
> TÍTULO: QCD SUM RULES APPROACH  FOR THE  GLUON CONDENSATE AND DECONFINEMENT. 
> 
>   
> 
> EXPONE: MARCELO LOEWE 
> 
> After a brief introduction of the QCD Sum Rules approach, including its extensión to the finite temperature and density scenario, we will concentrate on the finite energy sum rules (FESR) for the two point axial-vector current correlator in the presence of an external magnetic field, in the weak limit and at zero temperatura. Both the perturbative QCD and the hadronic contribution to the sum rules get explicit magnetic-field-dependent corrections which in turn induce a magnetic field dependence on the hadronic continuum threshold S0 and on the gluon condensate. We find from the dimensión d=2 first FESR that the magnetic field dependence of S0 is proportional to the absolute value of the light-quark condensate increasing, therefore, with an increasingn field strength. This shows that the parameter describing chiral symmetry restoration and deconfinement behave similarly as funtions of the magnetic field. At zero temperatura, the magnetic field plays the role of catalyzing agent of
both chiral symmetry breaking and confinement. From the second FESR, dimensión d=4, we obtain also the behavior of the gluon condensate as function of the magnetic field. This condensate aslo increases as function of the magnetic field.

 
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