The Japan Hadron Facility will provide an unprecedented opportunity for the study of baryon resonance properties. This talk will focus on the chiral nonanalytic behaviour of magnetic moments exclusive to baryons with open decay channels. To illustrate the novel features associated with an open decay channel, we consider the " Access " quark model, where an analytic continuation of chiral pertur...

We give a general formulation of the quark diagram scheme for the nonleptonic weak decays of baryons. We apply it to all decays of the antitriplet and sextet charmed baryons and express their decay amplitudes in terms of the quark-diagram amplitudes, including the e ects of nal-state interactions. (We also point out the mistaken results in the literature.) We obtain many relations among various...

It is shown that the absolute rate of the semileptonic decays of the Ξc baryons can be as much as two times higher than the semileptonic decay rate of Λc due to the Pauli interference of the strange quark. This interference effect is still larger in the semileptonic decay rate of Ωc. An experimental measurement of the difference of these rates would thus provide an important piece of informatio...

The status of top quark searches will be briefly reviewed. Theoretical predictions for the top quark decay rate are presented including QCD and electroweak radiative corrections. The possibilities for quarkonium searches at an hadron collider will be discussed. The perspectives for top production at an electron positron collider will be described in detail with emphasis on the behavior of the c...

We study the angular distribution of the charged lepton in the top-quark decay into a bottom quark and a W boson which subsequently decays into lνl, when a hard gluon is radiated off. The absorptive part of the t → bWg decay amplitudes, which gives rise to T -odd asymmetries in the distribution, is calculated at the one-loop level in perturbative QCD. The asymmetries at a few percent level are ...

We study the corrections due to renormalons to the heavy hadron decay width. The renormalons contribution estimated in terms of finite gluon mass based on the assumption that the gluon mass represents the short distance nonperturbative effects in the standard OPE (and hence in the heavy quark expansion). We found that the corrections are about 10% of the leading decay rate. We point out the imp...

We analyze the inclusive decay mode B → Xs +Missing Energy in the unparticle model, where an unparticle can also serve as the missing energy. We use the Heavy Quark Effective Theory in the calculation. The analytical result of the decay width in the free quark limit and that of the differential decay rate to the order of 1/mb are presented. Numerical results of the inclusive mode show interesti...

The one-loop supersymmetric QCD corrections to the top quark semileptonic decays t → b l̄ νl are considered. The corrections are found to reduce the decay width. In the still acceptable parameter space the corrections to the percentage change in top quark semileptonic decay width can reach the level of -0.7%. PACS numbers: 11.30.Pb, 12.38.Bx, 14.65.Ha Keyword(s): SUSY QCD, RADIATIVE CORRECTIONS,...

We discuss the rare decay of the top quark into a pair of same charge leptons (with identical or different flavors), a b quark and a (real or virtual) W−. The above process proceeds only if the exchanged neutrino N is of the Majorana type. This decay is the neutrinoless double β decay of the top. We find measurable values for its rate at the LHC with luminosity of 100fb−1. Furthermore, we consi...

In some models, exotic baryons with strangeness and anticharm or antibeauty should exist and even be stable against strong decay. We consider the stability of such possible exotic baryons, which in the constituent quark picture are called pentaquarks (each is composed of four quarks and an antiquark). Our model is based on diquark clustering and supersymmetry in hadrons, and assumes that the sp...