String Seminars
This series consists of talks in the area of Superstring Theory.
Seminar Series Events/Videos
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Tuesday Apr 22, 2008Speaker(s):
Geometries produced by brane intersections preserving eight supercharges are constructed. Typical examples of such configurations are given by fundamental strings ending on D branes and by brane webs. Consistency conditions of supergravity are shown to impose certain requirements on the locations of the sources, and these restrictions are found to be in a perfect agreement with results of the probe analysis. This agreement serves as a nontrivial test of the duality between open and closed strings. Some applications to AdS/CFT correspondence are also discussed.
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Tuesday Apr 15, 2008Speaker(s):
F-theory compactifications on Calabi-Yau fourfolds provide one way to obtain N=1 supersymmetric grand unified models of particle physics from string theory. With this motivation in mind, I will consider F-theory on a particularly simple class of local Calabi-Yau fourfolds, for which a low-energy analysis based upon topological gauge theory is valid. For these models, I will explain how the geometry of the fourfold determines the spectrum of massless charged matter and the effective superpotential in four dimensions.
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Thursday Apr 10, 2008Speaker(s):
TBA
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Monday Mar 31, 2008Speaker(s):
TBA
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Tuesday Mar 25, 2008Speaker(s):Collection/Series:Scientific Areas:
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Tuesday Mar 18, 2008Speaker(s):Collection/Series:Scientific Areas:
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Tuesday Mar 11, 2008Speaker(s):
TBA
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Tuesday Mar 04, 2008Speaker(s):
TBA
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Tuesday Feb 26, 2008Speaker(s):
TBA
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Tuesday Feb 19, 2008Speaker(s):
We consider the large N limit of a class of fourdimensional supersymmetric theories in conjunction with a limit in their parameter space towards singular points where extra baryonic states become light, which causes the low-energy description to break down. However, this can be cured by defining a large N double scaling limit where one approaches the singularity by keeping the mass M of these states fixed. This limit has several interesting features.
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