منابع مشابه
Anomalous Creation of Branes
In certain circumstances when two branes pass through each other a third brane is produced stretching between them. We explain this phenomenon by the use of chains of dualities and the in ow of charge that is required for the absence of chiral gauge anomalies when pairs of D-branes intersect. At large distances D-branes [1, 2] interact through the long-range elds of supergravity. At substringy ...
متن کاملCosmological Creation of D-branes and anti-D-branes
We argue that the early universe may be described by an initial state of space-filling branes and anti-branes. At high temperature this system is stable. At low temperature tachyons appear and lead to a phase transition, dynamics, and the creation of D-branes. These branes are cosmologically produced in a generic fashion by the Kibble mechanism. From an entropic point of view, the formation of ...
متن کاملAnomalous Couplings of Type 0 D-branes
Closed type 0 string theories and their D-branes are introduced. The full Wess-Zumino action of these D-branes is derived. The analogy with type II is emphasized throughout the argument. Type 0 Strings and D-branes. Type 0 string theory is a nonsupersymmetric, modular invariant theory of closed strings. The presence of a tachyonic state in their spectrum makes type 0 strings much harder to anal...
متن کاملD-branes and Creation of Strings
We review two types of D-branes processes where open strings are created. In the first type, a closed string incident on a collection of D-branes is converted into a number of open strings running along them. For the case of threebranes we compare the leading absorption rate with that in semiclassical gravity, and find exact agreement. A supersymmetric non-renormalization theorem guarantees tha...
متن کاملAnomalous Couplings of Non-bps D-branes
Non-BPS type II D-branes couple to R-R potentials via an action that, upon tachyon condensation, gives rise to the Wess-Zumino action of BPS D-branes. Non-BPS branes in string theory have received a lot of attention after the seminal work by Sen [1], as such non-BPS states allow for highly non-trivial tests of string dualities. In a related development, unstable and/or non-BPS D-branes have pla...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 1997
ISSN: 1029-8479
DOI: 10.1088/1126-6708/1997/07/002