Simple E_6 Unification with Anomalous U(1)_A Symmetry(Particles and Fields)

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概要

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• We propose Higgs sectors in E_6 grand unified theory (GUT) with anomalous U(1)_A gauge symmetry that are simpler than that of a previous model [N. Maekawa and T. Yamashita, Prog. Theor. Phys. 107(2002), 1201]. In these new Higgs sectors, as in the previous one, the doublet-triplet (DT) splitting can be realized in a natural way, while proton decay via dimension 5 operators is suppressed, and gauge coupling unification is also realized without fine-tuning. Combining the matter sector, simple complete GUTs can be obtained. Since the Higgs sector is simpler, it is possible for the gauge coupling constant at the cutoff scale to be in the perturbative region, and therefore, the estimated value of the lifetime of a nucleon in this model, τ_p(p → e^+π^0) 〜 5 × 10^<33> years, is more reliable.

• 理論物理学刊行会の論文
• 2003-07-25

著者

• Maekawa Nobuhiro

  Department Of Anesthesia And Perioperative Medicine Kobe University Hospital

• Yamashita Toshifumi

  Department Of Physics Kyoto University

• Maekawa N

  名古屋大学大学院理学研究科

• Maekawa Nobuhiro

  Department Of Anesthesia And Perioperative Medicine Kobe University

• MAEKAWA Nobuhiko

  Department of Physics, Kyoto University

• MAEKAWA Nobuhiro

  Department of Physics. Kyoto University

• MAEKAWA Nobuhiro

  Departinrnt of Physics, Kyoto University

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