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We consider an extension of the standard model gauge symmetry to a local gauge group S U ( 3 ) C ⊗ S U ( 3 ) L ⊗ U ( 1 ) X which is a subgroup of S U ( 4 ) P S ⊗ S U ( 4 ) L + R . The symmetry breaking pattern is S U ( 4 ) → S U ( 3 ) ⊗ U ( 1 ) for both weak S U ( 4 ) L + R and strong Pati-Salam S U ( 4 ) P S group. The S U ( 3 ) C ⊗ U ( 1 ) B - L ⊗ S U ( 3 ) L ⊗ U ( 1 ) Y 1 (3-3-1-1) local gauge symmetry breaks to S U ( 3 ) C ⊗ S U ( 3 ) L ⊗ U ( 1 ) X and generates a <?format ?>3-3-1 model with three-generation, anomaly-free fermions which transform as bifundamentals of <?format ?>(3-3-1-1). The 3-3-1 model is of Pleitez-Frampton type but S U ( 3 ) L gauge bosons ( B - L = 0 ) do not include bilepton gauge boson. The neutral gauge bosons include γ , Z , Z ′ and a fourth, heavy gauge boson Z ′ ′ which decouples from rest but can decay to ordinary fermions. An analysis for two-body decays of neutral Z ′ gauge boson is presented. From Yukawa interactions, the masses of all exotic fermions are obtained in the TeV region. This restricts Z ′ decays to exotic fermions. The Z ′ is also found to be leptophobic and decays mainly to quarks.
Physical Review D – American Physical Society (APS)
Published: Feb 1, 2005
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