منابع مشابه
Proton decay
The status of proton decay is described, including general motivations for baryon number violation, and the present and future experimental situation. Grand unification with and without supersymmetry is considered, including possible evidence from coupling constant unification and implications for proton decay and neutrino mass. 1 Motivations Baryon number is almost certainly not absolutely con...
متن کاملProton Decay
We discuss the status of supersymmetric grand unified theories [SUSY GUTs] with regards to the observation of proton decay. In this talk we focus on SUSY GUTs in 4 dimensions. We outline the major theoretical uncertainties present in the calculation of the proton lifetime and then present our best estimate of an absolute upper bound on the predicted proton lifetime. Towards the end, we consider...
متن کاملProton Decay in SO
We calculate the proton lifetime in an SO(10) supersymmetric grand unified theory [SUSY GUT] with U(2) family symmetry. This model fits the low energy data, including the recent data for neutrino oscillations. We discuss the predictions of this model for the proton lifetime in light of recent SuperKamiokande results which significantly constrain the SUSY parameter space of the model. Some of th...
متن کاملUnification, Multiplets and Proton Decay
We make a detailed analysis of gauge coupling unification in supersymmetry. When the Standard Model gauge group is embedded in a Grand Unified Theory, new particles often appear below the GUT scale in order to predict the right phenomenology at low energy. While these new particles are beyond the reach of accelerator experiments, they change the prediction of αs. Here we classify all the (SU(3)...
متن کاملFamily Symmetries and Proton Decay
The proton decay modes p → Ke and p → Kμ 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 (Q1Q1Q2L1,2), where Qi and Li are i th generation quark and lepton superfields respectively. Such an operator is not generated at observable levels due to g...
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ژورنال
عنوان ژورنال: Nature
سال: 1981
ISSN: 0028-0836,1476-4687
DOI: 10.1038/291006c0