Heavy Leptons, Weak Angles and a Sextet of Quarks

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概要

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• The possible existence of heavy leptons and several schemes to accommodate these leptons are investigated. We first study the problems related to the lepton number assignment and the existence of weak lepton angles. A possible violation of the e-μ universality and its experimental consequences are examined. Guided by a lepton-hadron analogy, we also discuss a sextet scheme of hadrons based on (p, p', p", n, λ, λ') which was previously studied in connection with ψ-particles. Several versions of the sextet scheme, in particular, the structure of weak hadron currents in the SU(2)_L×U(1) gauge theory and a generalization of the Cabibbo analysis are discussed. If one takes (p, n, λ, λ') as a low lying quartet among the sextet of quarks, the low lying "charmed" particles have rather long lifetime and decay predominantly into non-strange particles. The radiative width of ψ-particle in this scheme becomes one quarter of that in the standard quartet model. We finally comment on the dimuon events at FNAL.

• 理論物理学刊行会の論文
• 1976-06-25

著者

• FUJIKAWA Kazuo

  Institute of Quantum Science, College of Science and Technology, Nihon University

• Kawamoto Noboru

  Institute For Nuclear Study University Of Tokyo:department Of Physics Tokyo Institute Of Technology

• Fujikawa Kazuo

  Institute For Nuclear Study University Of Tokyo

• Fujikawa Kazuo

  Institute For Nuclear Study University Of Tokyo:desy

• Kawamoto Noboru

  Department of Physics Tokyo Institute of Technology:Institute for Nuclear Study, University of Tokyo

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