[en] The masses of the S-state hadrons containing only light quarks or containing a single charmed or bottom quark are calculated in a bag model using the static cavity approximation. The heavy quarks are treated as point particles fixed at the center of the bag and the light quarks are treated in te usual way of being free particles confined to the gas. The MIT bag model has been extended to include center-of-mass corrections, asymptotic freedom, and Johnson's vacuum. In applying the nonlinear boundary condition of minimizing the mass as a function of the radius, a rigorous first order approach is used that identifies and eliminates higher order terms in α_s that normally appear in the expression for the mass when center-of-mass corrections are included. The electromagnetic and pion decay rates have also been calculated for those S-state hadrons containing a single charmed or bottom quark

[en] With the advent of new powerful experimental facilities providing large numbers of pions, η, η^' and other light mesons, there is hope of improving the accuracy of measurement of many decay modes and of observing new rare decay modes. A brief review is given over various possible weak and electromagnetic decays of these particles. In particular, the electromagnetic decays of the π⁰, η and η^' mesons are discussed in some detail

No abstract available

[en] The two highest precision determinations of α_s (M_Z² ), that based on the analysis of short-distance-sensitive lattice observables, and that based on an analysis of hadronic τ decay data, have, until very recently, given results which are not in good agreement. I review new versions of these analyses which bring the two determinations into excellent agreement, and discuss prospects for additional future improvements. (author)

[en] After a brief description of the CLEO detector, results reported by the CLEO Collaboration on B meson decays are presented. Most of the results were reported by CLEO during 1993

No abstract available

[en] We first summarize (a) why the quark s-bar-d-bar loop transition dominated by the physical W⁺ exchange controls the large ΔI=1/2 K_π and K_2π^o nonleptonic decay amplitudes, and (b) why the vacuum-saturated hadronic (implied W⁺) current-current hamiltonian correctly explains the small ΔI-3/2 K_2π⁺ decay. Then we study in greater detail a more complete hadronic D.K.π meson-W^± loop calculation of the ΔI=1/2 and ΔI=3/2 K_2π amplitudes and show that this picture further reinforces our original quark ΔI=1/2 and hadron vacuum-saturated ΔI=3/2 (long distance) scheme. (author). 29 refs, 8 figs

[en] Meson physics was studied in a relativized quark model which includes the important features of quantum chromodynamics. It was found that all mesons, from the π to the Υ, can be describe successfully in this model. The key ingredient of the model is a universal one-gluon-exchange plus linear confinement potential motivated by QCD. However, it is crucial to the success of the model that relativistic effects be included. The spectroscopic results of the model are supported by an extensive analysis of strong, electromagnetic, and weak couplings. The model will be described briefly followed by a more detailed discussion of high spin mesons

[en] One of the primary tasks for the coming round of experiments is the search for the Higgs boson(s), the final, undetected remnant(s) of electroweak symmetry breaking. What, exactly, are we looking for? There may exist one or more scalar particles, charged or neutral, which decay preferentially, up to mixing angles which may cloud the phenomenological picture, into the heaviest available ''daughters'', and which weigh anything within the accessible mass range. Clearly, this search will have to be carried out at several different machines, taking advantage of their complementary features. The author describes here a few of the ways he thinks he can find the neutral, Standard Model Higgs at LEP 200, an e⁺e^- colliding beam machine at E/sub cm/= 200 GeV. Perhaps some of these techniques will be of some use at pp colliders as well

[en] The strong and electromagnetic decays of the ground-state tensor mesons are studied in an effective field approach. A fit to the well-known experimental data is performed. The decay ratios of the tensor glueball are evaluated and possible candidates are discussed