English

Quark-Lepton Nonuniversality

High Energy Physics - Phenomenology 2007-05-23 v1

Abstract

There is new experimental evidence which may be interpreted as a small departure from quark-lepton universality. We propose to understand this as the result of a hierarchy of mass scales in analogy to mu,md<<ΛQCDm_u, m_d << \Lambda_{QCD} for strong isospin. We show (GF)lqNC<(GF)lqCC<(GF)llCC<(GF)llNC(G_F)^{NC}_{lq} < (G_F)^{CC}_{lq} < (G_F)^{CC}_{ll} < (G_F)^{NC}_{ll} in principle, but all are still approximately equal. New physics is predicted at the TeV scale.

Keywords

Cite

@article{arxiv.hep-ph/0301006,
  title  = {Quark-Lepton Nonuniversality},
  author = {Xiao-Yuan Li and Ernest Ma},
  journal= {arXiv preprint arXiv:hep-ph/0301006},
  year   = {2007}
}

Comments

3 pages, talk by E. Ma at XXIII ENFPC, Aguas de Lindoia, Brazil (Oct 2002)