Fwd: SP Seminar 26.09 @SISSA: Alessandro Codello (room changed)

[Condensed Matter Section]

Below the information about a seminar tomorrow at 11:00 a.m. in the 
Meeting Room at SISSA Via Bonomea, 7th Floor - please notice the CHANGE 
OF LECTURE ROOM. We also draw your attention to the fact that there will 
be on October 4th, at 3:00 p.m., a TPP seminar by Safari Mahmoud (INFN 
and University of Bologna) on related arguments. 
***************************************************************** Joint 
ICTP/SISSA Statistical Physics Seminar Tuesday, 26 September at 11:00 
a.m. SISSA, Via Bonomea, Big Meeting Room, 7th Floor 
***************************************************************** 
Speaker: Alessandro Codello Title: Functional perturbative RG and CFT 
data in the e-expansion Abstract: I will show how the use of standard 
perturbative RG in dimensional regularization allows for a 
renormalization group based computation of both the spectrum and a 
family of coefficients of the operator product expansion (OPE) for the 
whole family of scalar multi-critical universality classes. The task is 
greatly simplified by a straightforward generalization of perturbation 
theory to a functional perturbative RG approach. I illustrate the 
procedure in the e-expansion by obtaining the next-to-leading 
corrections for the spectrum and the leading corrections for the OPE 
coefficients of Ising and Lee-Yang universality classes and then give 
several results for the whole family of renormalizable multi-critical 
models. Whenever comparison is possible our RG results explicitly match 
the ones recently derived using combination of CFT constraints, 
Schwinger-Dyson equation and the free theory behavior at the upper 
critical dimension. 
***************************************************************** 
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