Gauge Origin of Baryon Number Conservation and Suppressed Neutrino Masses From Five Dimensions

Details Gauge Origin of Baryon Number Conservation and Suppressed Neutrino Masses From Five Dimensions Gauge Origin of Baryon Number Conservation and Suppressed Neutrino Masses From Five Dimensions

2002-06-25

arxiv.org/abs/hep-ph/0206258v2

Phys.Rev.D66:055010,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, LaTex

Scientific paper

10.1103/PhysRevD.66.055010

We consider a 5D SUSY $SU(3)_c\times SU(2)_L\times U(1)_Y\times {\cal U}(1)$ model compactified on an $S^{(1)}/Z_2$ orbifold. To cancel anomalies arising from the presence of ${\cal U}(1)$, we employ a Chern-Simons term and also chiral fields which could reside on the brane or in the bulk depending on the model. The presence of ${\cal U}(1)$ symmetry leads to baryon number conservation, gives rise to matter parity, and permits satisfactory neutrino masses and mixings even for a low fundamental scale. The brane Fayet-Iliopoulos D-terms naturally break ${\cal U}(1)$, leaving N=1 SUSY unbroken in 4 dimensions.

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