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Weak Interactions with Lepton-Hadron Symmetry
We propose a model of weak interactions in which the currents are constructed out of four basic quark fields and interact with a charged massive vector boson. We show, to all orders in perturbationExpand
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Diquark-antidiquarks with hidden or open charm and the nature of X(3872)
Heavy-light diquarks can be the building blocks of a rich spectrum of states which can accommodate some of the newly observed charmoniumlike resonances not fitting a pure $c\overline{c}$ assignment.Expand
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Z (4430) and a new paradigm for spin interactions in tetraquarks
Following the recent confirmation of the Z+(4430) resonance with J^{PG}=1^{++}, we have re-examined the model of S- and P-wave tetraquarks. We propose a `type-II' diquark-antidiquark model whichExpand
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A symmetric theory of electrons and positrons
It is shown that it is possible to achieve complete formal symmetrization in the electron and proton quantum theory by means of a new quantization process. The meaning of Dirac equations is somewhatExpand
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Chiral Symmetry on the Lattice with Wilson Fermions
Abstract The chiral properties of the continuum limit of lattice QCD with Wilson fermions are studied. We show that a partially conserved axial current can be defined, satisfying the usual currentExpand
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Leptonic Decay of Heavy Flavors: A Theoretical Update
Abstract The spectrum of charged leptons in semileptonic B and D decays is reanalyzed. Special emphasis is given to the behaviour near the end point which is of importance for the determination ofExpand
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Final state interactions from euclidean correlation functions
Abstract We study the three-point euclidean correlation functions and derive a theorem relating their asymptotic behaviour in euclidean time and for infinite space volume to the threshold time-likeExpand
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Bounds on the Fermions and Higgs Boson Masses in Grand Unified Theories
Abstract In the framework of grand unifying theories, the requirement that no interaction becomes strong and no vacuum instability develops up to the unification energy is shown to imply upper boundsExpand
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Octet enhancement of non-leptonic weak interactions in asymptotically free gauge theories
Abstract Octet enhancement of weak non leptonic amplitudes is found to occur in asymptotically free gauge theories of strong interactions, combined with unified weak and e.m. interactions. The orderExpand
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