Anomalous U(1)s in Type I superstring vacua

Details Anomalous U(1)s in Type I superstring vacua Anomalous U(1)s in Type I superstring vacua

2002-04-18

arxiv.org/abs/hep-th/0204153v3

Nucl.Phys.B637:92-118,2002

Physics

High Energy Physics

High Energy Physics - Theory

LateX, 30pages, (v2) minor corrections, versio to appear in Nucl. Phys. B

Scientific paper

10.1016/S0550-3213(02)00458-3

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.

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