What is the Discrete Gauge Symmetry of the MSSM?

Details What is the Discrete Gauge Symmetry of the MSSM? What is the Discrete Gauge Symmetry of the MSSM?

2005-12-13

arxiv.org/abs/hep-ph/0512163v3

Phys.Rev. D73 (2006) 075007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Typo in item 2 below Eq.(6.9) corrected (wrong factor of "3"); 27 pages, 5 tables

Scientific paper

10.1103/PhysRevD.73.075007

We systematically study the extension of the Supersymmetric Standard Model (SSM) by an anomaly-free discrete gauge symmetry Z_N. We extend the work of Ibanez and Ross with N=2,3 to arbitrary values of N. As new fundamental symmetries, we find four Z_6, nine Z_9 and nine Z_18. We then place three phenomenological demands upon the low-energy effective SSM: (i) the presence of the mu-term in the superpotential, (ii) baryon-number conservation upto dimension-five operators, and (iii) the presence of the see-saw neutrino mass term LHLH. We are then left with only two anomaly-free discrete gauge symmetries: baryon-triality, B_3, and a new Z_6, which we call proton-hexality, P_6. Unlike B_3, P_6 prohibits the dimension-four lepton-number violating operators. This we propose as the discrete gauge symmetry of the Minimal SSM, instead of R-parity.

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