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Fractional branes and N = 1 gauge theories

Matteo Bertolini ; Paolo Di Vecchia ; Gabriele Ferretti (Institutionen för teoretisk fysik och mekanik, Matematisk fysik) ; R Marotta
Nuclera Physics Vol. B (2002), 630, p. 222.
[Artikel, refereegranskad vetenskaplig]

We discuss fractional D3-branes on the orbifold C^3/Z_2*Z_2. We study the open and the closed string spectrum on this orbifold. The corresponding N=1 theory on the brane has, generically, a U(N_1)*U(N_2)*U(N_3)*U(N_4) gauge group with matter in the bifundamental. In particular, when only one type of brane is present, one obtains pure N=1 Yang-Mills. We study the coupling of the branes to the bulk fields and present the corresponding supergravity solution, valid at large distances. By using a probe analysis, we are able to obtain the Wilsonian beta-function for those gauge theories that possess some chiral multiplet. Although, due to the lack of moduli, the probe technique is not directly applicable to the case of pure N=1 Yang-Mills, we point out that the same formula gives the correct result also for this case.

Nyckelord: Fractional branes, supersymmetry, gauge theory

Denna post skapades 2006-08-25.
CPL Pubid: 2467


Institutioner (Chalmers)

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



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