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Título

Non-supersymmetric orientifolds of Gepner models

AutorGato Rivera, Beatriz ; Schellekens, A. N.
Fecha de publicación12-ene-2009
EditorElsevier
CitaciónPhysics Letters B 671(1): 105-110 (2009)
SerieNIKHEF/2008-027
IFF-FM-2008/03
ResumenStarting from a previously collected set of tachyon-free closed strings, we search for N=2 minimal model orientifold spectra which contain the standard model and are free of tachyons and tadpoles at lowest order. For each class of tachyon-free closed strings – bulk supersymmetry, automorphism invariants or Klein bottle projection – we do indeed find non-supersymmetric and tachyon free chiral brane configurations that contain the standard model. However, a tadpole-cancelling hidden sector could only be found in the case of bulk supersymmetry. Although about half of the examples we have found make use of branes that break the bulk space–time supersymmetry, the resulting massless open string spectra are nevertheless supersymmetric in all cases. Dropping the requirement that the standard model be contained in the spectrum, we find chiral tachyon and tadpole-free solutions in all three cases, although in the case of bulk supersymmetry all massless spectra are supersymmetric. In the other two cases we find truly non-supersymmetric spectra, but a large fraction of them are nevertheless partly or fully supersymmetric at the massless level.
Descripción6 pages, 4 figures.-- Available online Nov 20, 2008.-- ArXiv pre-print available at: http://arxiv.org/abs/0810.2267
Versión del editorhttp://dx.doi.org/10.1016/j.physletb.2008.11.039
URIhttp://hdl.handle.net/10261/13700
DOI10.1016/j.physletb.2008.11.039
ISSN0370-2693
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