Hypercharge and baryon minus lepton number in E6

Details Hypercharge and baryon minus lepton number in E6 Hypercharge and baryon minus lepton number in E6

2003-05-02

arxiv.org/abs/hep-ph/0305015v1

JHEP 0304 (2003) 011

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, JHEP3.cls, To appear in JHEP

Scientific paper

10.1088/1126-6708/2003/04/011

We study assignments of the hypercharge and baryon minus lepton number for particles in the $E_6$ grand unification model. It is shown that there are three assignments of hypercharge and three assignments of baryon minus lepton number which are consistent with the Standard Model. Their explicit expressions and detailed properties are given. In particular, we show that the $U(1)_{B-L}$ symmetry in $E_6$ cannot be orthogonal to the $SU(3)_R$ symmetry. Based on these investigations, we propose an alternative SU(5) grand unification model.

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