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

[tierno]

ESTIMADOS: 

AGRADECEMOS LA DIFUSIÓN DEL ANUNCIO DEL SEMINARIO DEL CICLO DE COLOQUIOS
Y SEMINARIOS QUE SE ORGANIZA EN EL INSTITUTO DE FÍSICA LA PLATA/
DEPARTAMENTO DE FÍSICA. 

 SE ADJUNTA MATERIAL PARA DIFUNDIR EN CARTELERAS. 

SALUDOS,  

ATTE. 

ADMINISTRACIÓN IFLP 

___________________________________________________________________________--


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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