U(1)_A Topological Susceptibility and its Slope, Pseudoscalar Gluonium and the Spin of the Proton

U(1)_B-L: Neutrino Physics and Inflation

U(1)_Q invariance and SU(3)_C X SU(3)_L X U(1)_X models with beta arbitrary

U(1)_R mediation from the flux compactification in six dimensions

U(1)_R-mediated supersymmetry breaking from a six-dimensional flux compactification

U(1,1)--Invariant Generation of Charges for Einstein--Maxwell--Dilaton--Axion Theory

U(12) A New Symmetry Possibly Realizing in Hadron Spectroscopy

U(2) and Maximal Mixing of nu_{mu}

U(2) and MFV in Supersymmetry

U(2) and Minimal Flavour Violation in Supersymmetry

U(2) Flavor Physics without U(2) Symmetry

U(2) instantons and leptons

U(2) projectors and 't Hooft-Polyakov monopoles on a fuzzy sphere

U(2)-chiral symmetries of supersymmetric QED3

U(2)-like Flavor Symmetries and Approximate Bimaximal Neutrino Mixing

U(2)^5 flavor symmetry and lepton universality violation in W -> tau nu_tau

U(2)_{L}\times U(2)_{R} Chiral Theory of Mesons

U(2,2) gravity on noncommutative space with symplectic structure

U(3) chiral perturbation theory with infrared regularization

U(3)-Family Nonet Higgs Boson and its Phenomenology