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M-Theory Model-Building and Proton Stability | | John Ellis
; Alon E. Faraggi
; D.V. Nanopoulos
; | | Date: |
5 Sep 1997 | | Journal: | Phys.Lett. B419 (1998) 123-131 | | Subject: | hep-th hep-ph | | Abstract: | We study the problem of baryon stability in M theory, starting from realistic four-dimensional string models constructed using the free-fermion formulation of the weakly-coupled heterotic string. Suitable variants of these models manifest an enhanced custodial gauge symmetry that forbids to all orders the appearance of dangerous dimension-five baryon-decay operators. We exhibit the underlying geometric (bosonic) interpretation of these models, which have a $Z_2 imes Z_2$ orbifold structure similar, but not identical, to the class of Calabi-Yau threefold compactifications of M and F theory investigated by Voisin and Borcea. A related generalization of their work may provide a solution to the problem of proton stability in M theory. | | Source: | arXiv, hep-th/9709049 | | Services: | Forum | Review | PDF | Favorites | |
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