The Abelian decomposition of QCD which decomposes the gluons to the color neutral binding gluons and the colored valence gluons shows that QCD can be viewed as the restricted QCD (RCD) made of the binding gluons which has the valence gluons as colored source, and simplifies the QCD dynamics greatly. In particular, it tells that the gauge covariant valence gluons can be treated as the constituents of hadrons, and generalizes the quark model to the quark and valence gluon model. So it provides a comprehensive picture of glueballs and their mixing with quarkoniums, and predicts new hybrid hadrons made of quarks and valence gluons. We discuss how these predictions could be confirmed experimentally. In particular we present a systematic search for the ground state glueballs and their mixing with quarkoniums below 2 GeV in 0 ++ , 2 ++ , and 0 −+ channels within the framework of QCD, and predict the relative branching ratios of the radiative decay of ψ to the physical states.

Assuming factorization, we establish restrictions on B K (K ) form factors imposed by recent data on B J/P + K (K*) decay rates and polarization. We show that these constraints are not satisfied by commonly used models. In addition, we relate B K (K ) form factors to those in D K (K*) transitions using the heavy flavor symmetry as proposed by Isgur and Wise and discuss the uncertainties in this procedure. We find that this method also leads to form factors excluded by data.

Ho-Kim, Q. (Quang), 1938-Elementary particles and their interactions: concepts and phenomena / Quang Ho-Kim, Xuan-Yem Pham. p. cm. Includes bibliographical references and index. ISBN 3-540-63667-6 (alk. paper) 1. Particles (Nuclear physics) 2.. Nuclear reactions. I.

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Abstract-Neutrino oscillations, as recently reported by the Super-Kamiokande collaboration, imply that lepton numbers could be violated, and τ ± → µ ± + + + − , τ ± → µ ± + ρ 0 are some typical examples. We point out that in these neutrinoless modes, the GIM cancelation is much milder with only a logarithmic behavior log(m j /m k ) where m j,k are the neutrino masses. This is in sharp contrast with the vanishingly small amplitude τ ± → µ ± +γ strongly suppressed by the quadratic powerIn comparison with the hopelessly small branching ratio B(τ ± → µ ± + γ) ≈ 10 −40 , the B(τ ± → µ ± + + + − ) could be larger than 10 −14 . The latter mode, if measurable, could give one more constraint to the lepton mixing angle sin 2θ jk and the neutrino mass ratio m j /m k , and therefore is complementary to neutrino oscillation experiments.

Mass effects in weak-decay rates of heavy particles are computed. A natural explanation of the experimental D ' semileptonic branching ratio arises when mass and quantum-chrornodynamic corrections are both taken into account. The experimental results on semileptonic branching ratio of b-flavored B mesons allows the prediction of the lifetime ratio r ( B )/r(K0) 5 3.5 in a model-independent way.

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