We study gauge and Yukawa coupling unification in the simplest extension of the Minimal Supersymmetric Standard Model (MSSM) which incorporates R-Parity violation through a bilinear superpotential term. Contrary to what happens in the MSSM, we show that bottom-tau unification at the scale M_GUT where the gauge couplings unify can be achieved for any value of tan(beta) by choosing appropriately the sneutrino vacuum expectation value. In addition, we show that bottom-tau-top unification occurs in a slightly wider tan(beta) range than in the MSSM.
Díaz, Marco Aurelio Ferrandis Alapont, Francisco Javier Romao, J. C. Furtado Valle, José Wagner 1999 Gauge and Yukawa unification with broken R-parity Physics Letters B 453 3-4 263 268
