In quest of "just" the Standard Model on D-branes at a singularity

Details In quest of "just" the Standard Model on D-branes at a singularity In quest of "just" the Standard Model on D-branes at a singularity

2002-03-14

arxiv.org/abs/hep-th/0203129v2

JHEP0205:022,2002

Physics

High Energy Physics

High Energy Physics - Theory

18 pages, 1 table, no figures, v2: typos corrected

Scientific paper

10.1088/1126-6708/2002/05/022

In this note we explore the possibility of obtaining gauge bosons and fermionic spectrum as close as possible to the Standard Model content, by placing D3-branes at a ZN orbifold-like singularity in the presence of D7-branes. Indeed, we find that this is plausible provided a sufficiently high N is allowed for and the singular point is also fixed by an orientifold action. If extra charged matter is not permitted then the singularity should necessarily be non-supersymmetric. Correct hypercharge assignments require a dependence on some Abelian gauge D7-groups. In achieving such a construction we follow a recent observation made in Ref. [hep-th/0105155] about the possibility that, the three left handed quarks, would present different U(2) transformation properties.

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