Family Symmetries and Proton Decay

Details Family Symmetries and Proton Decay Family Symmetries and Proton Decay

1994-06-30

arxiv.org/abs/hep-ph/9406423v1

Phys.Lett.B336:221-228,1994

Physics

High Energy Physics

High Energy Physics - Phenomenology

NSF-ITP-94-69, LBL-35807, DOE/ER/40561-148-INT94-00-61, 13 pages, written with harvmac

Scientific paper

10.1016/0370-2693(94)90242-9

The proton decay modes $p\to K^0 e^+$ and $p\to K^0 \mu^+$ may be visible in certain supersymmetric theories, and if seen would provide evidence for new flavor physics at extremely short distances. These decay modes can arise from the dimension five operator $(Q_1Q_1Q_2L_{1,2})$, where $Q_i$ and $L_i$ are ${i^{th}}$ generation quark and lepton superfields respectively. Such an operator is not generated at observable levels due to gauge or Higgs boson exchange in a minimal GUT. However in theories that explain the fermion mass hierarchy, it may be generated at the Planck scale with a strength such that the decays $p\to K^0 \ell^+$ are both compatible with the proton lifetime and visible at Super-Kamiokande. Observable proton decay can even occur in theories without unification.

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