I.F.T.
Almuerzo-Seminario
(Lunch seminar)
October 19th 1999, 14:00 p.m.
Anomaly Cancellation in D=4, N=1 Orientifolds
and Linear/Chiral Multiplet Duality
Matthias Klein
I.F.T./U.A.M.
It has been proposed that gauge and K"ahler anomalies in
four-dimensional type IIB orientifolds are cancelled by a generalized
Green-Schwarz mechanism involving exchange of twisted RR-fields. I
explain how this can be understood using the well-known duality
between linear and chiral multiplets. I find that all the twisted
fields associated to the N=1 sectors and some of the fields associated
to the N=2 sectors reside in linear multiplets. Only the linear
multiplets contribute to anomaly cancellation. This suffices to cancel
all U(1) anomalies. In the case of K"ahler symmetries the complete
SL(2,R) can be restored at the quantum level for all planes that are
not fixed by an order-two twist.
The almuerzo-seminario is
intended to be an informal seminar and an open forum for discussion.
You are wellcome to bring your own
bocata (sandwich), or coffee or tea.
Where: Modulo C-XVI, 3rd floor,
Facultad de Ciencias U.A.M., C.U. Cantoblanco, 28049-Madrid
To get more information about this seminar e-mail
Tomás Ortín
or phone +34-91-397-8546
Last modified: Wed Oct 13 23:34:42 CEST 1999