1996/04/17 by David E. Brahm, Brahm, David E.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9604325
4 pages, LaTeX, 1 figure (using epsf). Running of lambda added, typos fixed
arxiv created 1996/08/22 · arxiv updated 2009/11/30
The \Zbb excess, \Zcc deficit, and low left-right asymmetry Ab may be explained by a single term \lam Cc Bc B′ c in the superpotential. This operator violates R-parity and requires a sequential 4th generation. 1-loop diagrams involving squark exchange interfere with the tree-level processes to give an excess of right-handed b quarks, and a deficit of right-handed c quarks. Though the coupling must be large (\lam≈ 2 or 3), the model is phenomenologically and cosmologically acceptable.