We present new studies of 3-jet nal states from hadronic Z decays recorded by the SLD experiment, in which jets are identi ed as quark, antiquark or gluon. Our gluon energy spectrum, measured over the full kinematic range, is consistent with the predictions of QCD, and we derive a limit on an anomalous chromomagnetic bbg coupling. We measure the parity violation in Z decays into b bg to be cons...

After a lightning review of current bounds on the masses of supersymmetric particles, we describe strategies that may be helpful for extracting signals from the production of squarks, gluinos or top squarks, and from associated chargino-neutralino production at the Tevatron. We then briefly review SUSY signals at hadron and e + e − supercolliders. We discuss how various SUSY signals may be corr...

1 Restoration of chiral and U (1) A symmetries in excited hadrons. The effective restoration of SU(2) L × SU(2) R and U(1) A chiral symmetries of QCD in excited hadrons is reviewed. While the low-lying hadron spectrum is mostly shaped by the spontaneous breaking of chiral symmetry, in the high-lying hadrons the role of the quark con-densate of the vacuum becomes negligible and the chiral symmet...

We investigate the spin 3/2 baryons in the 27-plet based on flavor SU(3) symmetry. For J = 3/2, we find all the candidates for non-exotic members. For J = 3/2−, we predict a new non-exotic member Λ(1780). Fitting the mass spectrum and calculating the widths of the members show an approximate symmetry of the 27-plet of SU(3). We find that the exotic members have relatively large widths and the Ξ...

New string dynamics is formulated on the basis of the extended set of supergauge constraints including not only supergauge Vira-soro conditions but also nilpotent supercurrent constraints. This approach arises from a natural generalization of the classical operator many-string vertices. The formulation of this model leads to three two-dimensional surfaces for description of hadron strings. It g...

The predictions of QCD for the evolution of the quark and gluon structure functions of a polarized proton are discussed. In fact, the parton polarizations increase with energy, for fixed Feynman x. Thus, polarized protons may be useful for the discovery or investigation of new physical phenomena at very high energy, especially i f there are new interactions or particles whose behavior violates ...

We revisit the minimal supersymmetric left–right model with B−L = 2 triplet Higgs fields and show that a self–consistent picture emerges with automatic R–parity conservation even in the absence of higher dimensional operators. By computing the effective potential for the Higgs system including heavy Majorana neutrino Yukawa couplings we show that the global minimum of the model can lie in the c...

We first study the hadronic lepton flavor violating tau decays within littlest Higgs model with T-parity (including one or two pseudoscalars, a vector resonance). consider case where only T-odd particles and partner fermions contribute, also its extension including Majorana neutrinos coming from an inverse seesaw. In both cases our mean values lie order of magnitude below current upper limits, ...

We revisit the minimal supersymmetric left–right model with B−L = 2 triplet Higgs fields and show that a self–consistent picture emerges with automatic R–parity conservation even in the absence of higher dimensional operators. By computing the effective potential for the Higgs system including heavy Majorana neutrino Yukawa couplings we show that the global minimum of the model can lie in the c...