1,399 research outputs found
Kontinuierliche Druckfiltration feinstkörniger Kohlekonzentrate. Continuous pressure filtration of very fine coal concentrates
A Note on the Equality of Algebraic and Geometric D-Brane Charges in WZW Models
The algebraic definition of charges for symmetry-preserving D-branes in
Wess-Zumino-Witten models is shown to coincide with the geometric definition,
for all simple Lie groups. The charge group for such branes is computed from
the ambiguities inherent in the geometric definition.Comment: 12 pages, fixed typos, added references and a couple of remark
A New Symmetry for QED
We demonstrate that QED exhibits a previously unobserved symmetry. Some
consequences are discussed.Comment: 9 pages, MZ-TH/93-02, DIAS-STP-93-0
Model building by coset space dimensional reduction in ten-dimensions with direct product gauge symmetry
We investigate ten-dimensional gauge theories whose extra six-dimensional
space is a compact coset space, , and gauge group is a direct product of
two Lie groups. We list up candidates of the gauge group and embeddings of
into them. After dimensional reduction of the coset space,we find fermion and
scalar representations of with
and which accomodate all of the standard
model particles. We also discuss possibilities to generate distinct Yukawa
couplings among the generations using representations with a different
dimension for and models.Comment: 14 pages; added local report number, added refferenc
Remarks on Chern-Simons invariants
The perturbative Chern-Simons theory is studied in a finite-dimensional
version or assuming that the propagator satisfies certain properties (as is the
case, e.g., with the propagator defined by Axelrod and Singer). It turns out
that the effective BV action is a function on cohomology (with shifted degrees)
that solves the quantum master equation and is defined modulo certain canonical
transformations that can be characterized completely. Out of it one obtains
invariants.Comment: 33 pages; minor corrections, new appendices with technical details,
new references, new example; to appear in Commun. Math. Phys
Die kontinuierliche Druckfiltration feiner Komplexerze - Scale up, Prozeß- und Anlagengestaltung
- …