Summary: UNIVERSITY OF CALIFORNIA, SANTA BARBARA
BERKELEY · DAVIS · IRVINE · LOS ANGELES · MERCED · RIVERSIDE · SAN DIEGO · SAN FRANCISCO
CSANTA BARBARA · SANTA CRUZ
Geometry, Topology, and Physics Seminar
Self-duality, K-theory, and Orientifolds
Friday, January 18, 2008, 4:00 p.m.
Room 6635 South Hall
Abstract: In joint work with Jacques Distler and Gregory Moore we develop the
theory of Ramond-Ramond fields on orientifolds in string theory. The mathematics
we encounter includes the localization theorem in (twisted) equivariant KO-theory,
KO-theoretic Wu classes, the self-duality of KO, etc. We derive the gravitational
contribution to Ramond-Ramond charge, generalizing a previous result in Type I
(the Green-Schwarz anomaly cancellation). Over the rationals this agrees with the
formula derived by Morales-Scrucca-Serone from the worldsheet point of view.
Information about future meetings of this seminar can be found at