Anomalous U(1)s in Type I superstring vacua
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In this article, the masses of anomalous U(1) gauge bosons in four-dimensional orientifold vacua were computed and their localization properties in the internal (compactified) space were studied.Abstract:
We perform a systematic string computation of the masses of anomalous U(1) gauge bosons in four-dimensional orientifold vacua, and we study their localization properties in the internal (compactified) space. We find that N=1 supersymmetric sectors yield four-dimensional contributions, localized in the whole six-dimensional internal space, while N=2 sectors give contributions localized in four internal dimensions. As a result, the U(1) gauge fields can be much lighter than the string scale, so that when the latter is at the TeV, they can mediate new non-universal repulsive forces at submillimeter distances much stronger than gravity. We also point out that even U(1)s which are free of four-dimensional anomalies may acquire non-zero masses as a consequence of six-dimensional anomalies.read more
Citations
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Anomalous U(1)'s and Proton Stability in Brane Models
Luis E. Ibáñez,Fernando Quevedo +1 more
TL;DR: In this article, the authors considered a general generation-independent U(1) gauge symmetry consistent with the presence of Yukawa couplings for all quarks and leptons in the SUSY version of the Standard Model.
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A Note on the Green - Schwarz Mechanism in Open - String Theories
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