Two-Loop Analysis of Gauge Coupling Unification with Anomalous U(1) Symmetry and Proton Decay(Particles and Fields)
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概要
- 論文の詳細を見る
Recently, a new mechanism, which explains why the three gauge coupling constants meet at a certain scale in the minimal supersymmetric standard model, has been proposed in a scenario of grand unified theories with anomalous U(1)_A gauge symmetry. It is a nontrivial result that although there are many superheavy fields whose mass scales are below the unification scale, this mechanism explains this fact by means of one-loop renormalization group equations. Since the unification scale generically becomes below the usual GUT scale, 2 x 10^16 GeV, and proton decay via dimension 5 operators is suppressed, the scenario predicts that proton decay via dimension 6 operators, ρ→eπ^0 will be observed in the near future. In this paper, we attempt to estimate a reasonable range of values of the lifetime of the proton predicted within this scenario by using a two-loop renormalization group calculation and the ambiguities of 〓(1) coefficients.
- 理論物理学刊行会の論文
- 2002-10-25
著者
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Yamashita Toshifumi
Department Of Physics Kyoto University
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Maekawa N
名古屋大学大学院理学研究科
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Maekawa Nobuhiro
Department Of Anesthesia And Perioperative Medicine Kobe University
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MAEKAWA Nobuhiko
Department of Physics, Kyoto University
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MAEKAWA Nobuhiro
Department of Physics. Kyoto University
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MAEKAWA Nobuhiro
Departinrnt of Physics, Kyoto University
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