Standard Model at Intersecting D5-branes: Lowering the String Scale
By D. Cremades, Luis E Ibáñez, F. Marchesano. 2002
159 citations recorded by the source corpus.
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.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/87468d093ebfc8e23b839b426903594a32c83840
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Citations in the corpus
- Yukawa couplings in intersecting D-brane models (2003, background): “Indeed, some of these models have been constructed in [3,4,9,10,14].”
- Orientifolds of K3 and Calabi-Yau manifolds with intersecting D-branes (2002, unknown): “Keywords: Superstring Vacua, D-branes, Supersymmetry Breaking. c© SISSA/ISAS 2002 http://jhep.sissa.it/archive/papers/jhep072002026/jhep072002026.pdf J H E P 0 7 ( 2 0 0 2 ) 0 2 6 Contents”
- Supersymmetric Intersecting Branes on the Type IIA T6/Bbb Z4 Orientifold (2002, background): “Intersecting brane world models have been the subject of elaborate string model building for several years [1-38].”
- TOWARD REALISTIC INTERSECTING D-BRANE MODELS (2005, methodology): “Therefore, typically these models require Ms of the order of the TeV scale.”
- Scales and hierarchies in warped compactifications and brane worlds (2002, background): “Many ideas have occurred in the literature, involving intersecting branes and branes at singularities, and it may be possible to combine these scenarios with a framework like that presented here, but clearly there is some non-trivial work to be done; some interesting recent progress in this directio”
- D‐branes in Standard Model building, gravity and cosmology (2003, methodology): “By arranging the multiplicities NA and the wrapping numbers m i A, n i A, models can be obtained with the standard model gauge group, and the correct spectrum [82, 83, 84, 88]-[91].”
- Four-dimensional string compactifications with D-branes, orientifolds and fluxes (2006, methodology): “Therefore, the models constructed in [36, 37, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234] can be regarded as a hybrid of these two methods to obtain chiral fermions, namely as intersecting branes at singularities.”