%0 Conference Paper
%F Oral 
%T Wall-crossing in N=2 theories: Smooth Index and Generalized Theta Series
%+ Laboratoire Charles Coulomb (L2C)
%A Alexandrov, Sergey
%F Invité
%< sans comité de lecture
%Z L2C:15-081
%B Théorie des Cordes en France
%C Paris, France
%8 2015-05-26
%D 2015
%Z Physics [physics]/High Energy Physics - Theory [hep-th]Conference papers
%X I'll present the construction of an index in 4d N=2 supersymmetric gauge theories which is smooth across walls of marginal stability and appears as a natural generalization of the CFIV index in two-dimensional theories. I'll explain its physical and geometric interpretation originating in the hyperkahler structure of the 3d theory obtained by compactification on a circle. In the end, I'll also briefly discuss the behavior under wall-crossing of certain generalized theta series which appear, in particular, in the description of NS5-brane instantons in Calabi-Yau compactifications of type II strings.
%G English
%L hal-01160075
%U https://hal.science/hal-01160075
%~ CNRS
%~ L2C
%~ MIPS
%~ UNIV-MONTPELLIER
%~ UM-2015-2021