No abstract available

[en] Recent results on baryon spectroscopy at BES are presented. Many N*, Λ* and Σ* peaks have been observed from various channels of J/ψ decays. Especially, a clear new peak around 2.02 GeV is observed in πN invariant mass spectrum for the J/ψ→n-barpπ^- process. (author)

[en] After explaining necessity of exotic hadrons, we discuss mechanisms which could determine production of the exotic Theta-baryon. A possible important role of resonances (producing the Theta in real or virtual decays) is emphasized for various processes. Several experimental directions for studies of such resonances, and the Theta itself, are suggested. We briefly discuss also recent negative results on the Theta-baryon

[en] Published in summary form only

[en] This book emphasizes the fundamental concepts and their phenomenological consequences in the physics of elementary particles. The author deals with quantum electrodynamics and with quantum chromodynamics. The unifying principle of working with gauge groups is applied to explain the electroweak interaction. The author presents the standard model and makes a comparison between theoretical and experimental results in particle physics

[en] The current state-of-the-art experimental studies of τ lepton production and decay are reviewed with an emphasis on the most recent results. The priorites for future measurements in this multifaceted laboratory are discussed

[en] General structure and classification of hadrons with orientable strings and string junctions are discussed. In addition to the familiar meson M₂=qq^- and baryon B₃=qqq, a lot of higher hadrons are expected to exist; linear tree family of M₄, B₅..., and meson ring family of M₂, M₄.... Even multibaryons and closed strings with junctions (but without urbaryons) are not necessarily ruled out. Mass, interactions, production and decay of orientable hadrons are examined. In particular, interaction rules are classified into allowed and forbidden ones, in conformity with the Okubo-Zweig-Iizuka and Freund-Waltz-Rosner selection rules for urbaryons and also with duality. The interaction rules forbid higher hadrons with three or more junctions to decay into two lowest hadrons (M₂ or B₃), and give possibilities to assign narrow NN^- resonances at 1932 and 1897 MeV to M₄, and psi particles to M₄ which should have a narrow width if its mass is lower than 4x(nucleon mass) asymptotically equals 3.76 GeV. (auth.)

No abstract available

No abstract available

[en] We show that a hadron gas with continuous emission may solve some of the problems that freeze out models encounter when studying strangeness particle ratios such as those by WA85 experiment. (author)