Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2002-05-08
Nucl.Phys. B643 (2002) 93-130
Physics
High Energy Physics
High Energy Physics - Theory
46 pages, Latex file, 5 figures. Minor corrections and references updated
Scientific paper
10.1016/S0550-3213(02)00746-0
Recently a class of Type IIA orientifold models was constructed yielding just the fermions of the SM at the intersections of D6-branes wrapping a 6-torus. We generalize that construction to the case of Type IIB compactified on an orientifold of T^4 \times (C/Z_N) with D5-branes intersecting at angles on T^4. We construct explicit models in which the massless fermion spectrum is just the one of a three-generation Standard Model. One of the motivations for these new constructions is that in this case there are 2 dimensions which are transverse to the SM D5-brane configuration. By making those two dimensions large enough one can have a low string scale M_s of order 1-10 TeV and still have a large M_{Planck} in agreement with observations. From this point of view, these are the first explicit D-brane string constructions where one can achieve having just the fermionic spectrum and gauge group of the SM embedded in a Low String Scale scenario. The cancellation of U(1) anomalies turns out to be quite analogous to the toroidal D6-brane case and the proton is automatically stable due to the gauging of baryon number. Unlike the D6-brane case, the present class of models has N = 0 SUSY both in the bulk and on the branes and hence the spectrum is simpler.
Cremades Daniel
Ibanez Luis E.
Marchesano Fernando
No associations
LandOfFree
Standard Model at Intersecting D5-branes: Lowering the String Scale does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Standard Model at Intersecting D5-branes: Lowering the String Scale, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Standard Model at Intersecting D5-branes: Lowering the String Scale will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-504731