There is a nice formulation of the geometry of QFT, available at :
http://www.math.jussieu.fr/~fpaugam/documents/enseignement/master-mathematical-physics-impa-v01-2011.pdfTowards the mathematics of quantum field theory (Jan 10 2011). URL originally posted.
Towards the mathematics of quantum field theory (Nov 30 2012). Updated.
Frédéric Paugam's Homepage (Current: Jun 25 2018).