Masses of composite fermions in a fermion-boson-symmetric preon model

Journal Article · Wed Feb 01 04:00:00 EST 1984 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.29.547· OSTI ID:5210784

Ito, I; Yasue, M

Masses of the leptons and quarks are discussed in a preon model. Gauge bosons (including the gluons and photon) as well as leptons, quarks, and Higgs scalars are made of spinor preons C and F and scalar preons f, f', c, and c, ' where C, c, and c' carry colors and lepton number and F, f, and f' carry weak isospins. Composite leptons and quarks are kept light because of the global SU(4)/sub L/ x SU(4)/sub R/ x SU(2)/sub L/ x SU(2)/sub R/ symmetry while composite gauge bosons are massless because of the local SU(3)/sub C/ x SU(2)/sub L/ x U(1)/sub Y/ gauge symmetry. Construction of an effective gauge-invariant preon Lagrangian requires scalar preons in addition to spinor preons. The masses for the leptons and quarks have upper bounds: ..cap alpha..m/sub C/ for (fC/sub L/)/sub L/ and (f'C/sub R/)/sub R/ and ..cap alpha../sup 3/2/G/sub F/ /sup -1/2/ for (cF/sub L/)/sub L/ and (c'F/sub R/)/sub R/ (most likely, their masses are of order ..cap alpha../sup 3/2/m/sub C/), where ..cap alpha.. is the fine-structure constant, m/sub C/ is the SU(4)/sub L/ x SU(4)/sub R/-breaking mass scale, and G/sub F/ /sup -1/2/ is the Fermi mass of 300 GeV. The appearance of ..cap alpha.. is due to the compositeness of gauge bosons.

• Research Organization: Institute of Physics, College of Technology, Seikei University, Musashino, Tokyo 180, Japan
• OSTI ID: 5210784
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 29:3; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645201* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- General & Scattering Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
COMPOSITE MODELS
ELEMENTARY PARTICLES
FERMIONS
GAUGE INVARIANCE
GLUONS
INVARIANCE PRINCIPLES
ISOSPIN
LEPTONS
LIE GROUPS
MASS FORMULAE
MASSLESS PARTICLES
MATHEMATICAL MODELS
PARTICLE MODELS
PARTICLE PROPERTIES
PHOTONS
POSTULATED PARTICLES
QUARKS
SPINORS
SU GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
U GROUPS
U-1 GROUPS