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D-brane probes on G(2) orbifolds

Gabriele Ferretti (Institutionen för teoretisk fysik och mekanik, Matematisk fysik) ; Per Salomonson (Institutionen för teoretisk fysik och mekanik, Elementarpartikelfysik) ; Dimitrios Tsimpis
Journal of High Energy Physics (1029-8479). Vol. 03 (2002), p. 04.
[Artikel, refereegranskad vetenskaplig]

We consider type-IIB string theory on a seven dimensional orbifold with holonomy in G2. The motivation is to use D1-branes as probes of the geometry. The low energy theory on the D1-brane is a sigma-model with two real supercharges (N = (1,1) in two dimensional language). We study in detail the closed and open string sectors and propose a coupling of the twisted fields to the brane that modifies the vacuum moduli space so that the singularity at the origin is removed. Instead of coming from D-terms, which are not present here, the modification comes from a ``twisted'' mass term for the seven scalar multiplets on the brane. The proposed mechanism involves a generalization of the moment map.

Nyckelord: orbifold, string theory, G2, branes

Denna post skapades 2006-08-25. Senast ändrad 2013-07-03.
CPL Pubid: 2469


Institutioner (Chalmers)

Institutionen för teoretisk fysik och mekanik, Matematisk fysik (1900-2005)
Institutionen för teoretisk fysik och mekanik, Elementarpartikelfysik (1900-2005)



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