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ResearchVan Swinderen Institute

Lunch seminar Abhishek Chowdhury

When:Fr 10-04-2015 14:00 - 15:00


Abhishek Chowdhury


Harish-Chandra Research Institute, Allahabad, India


BPS State Counting in Pure D-brane Configurations


Exact results for the BPS index are known for a class of BPS dyons in type II string theory compactified on a six dimensional torus. In this talk we set up the problem of counting the same BPS states in a duality frame in which the states carry only Ramond-Ramond charges. We explicitly count the number of states carrying the lowest possible charges and find agreement with the result obtained in other duality frames. Furthermore, we find that after factoring out the supermultiplet structure, each of these states carry zero angular momentum. This is in agreement with the prediction obtained from a representation of these states as supersymmetric black holes.