On walls of marginal stability in N=2 string theories


Autoria(s): David, Justin R
Data(s)

01/08/2009

Resumo

We study the properties of walls of marginal stability for BPS decays in a class of N = 2 theories. These theories arise in N = 2 string compactifications obtained as freely acting orbifolds of N = 4 theories, such theories include the STU model and the FHSV model. The cross sections of these walls for a generic decay in the axion-dilaton plane reduce to lines or circles. From the continuity properties of walls of marginal stability we show that central charges of BPS states do not vanish in the interior of the moduli space. Given a charge vector of a BPS state corresponding to a large black hole in these theories, we show that all walls of marginal stability intersect at the same point in the lower half of the axion-dilaton plane. We isolate a class of decays whose walls of marginal stability always lie in a region bounded by walls formed by decays to small black holes. This enables us to isolate a region in moduli space for which no decays occur within this class. We then study entropy enigma decays for such models and show that for generic values of the moduli, that is when moduli are of order one compared to the charges, entropy enigma decays do not occur in these models.

Formato

application/pdf

Identificador

http://eprints.iisc.ernet.in/24532/1/fulletxt.pdf

David, Justin R (2009) On walls of marginal stability in N=2 string theories. In: Journal of High Energy Physics (JHEP) (8). pp. 1-34.

Publicador

Institute of Physics

Relação

http://www.iop.org/EJ/abstract/1126-6708/2009/08/054

http://eprints.iisc.ernet.in/24532/

Palavras-Chave #Centre for High Energy Physics
Tipo

Journal Article

PeerReviewed