19,380 research outputs found

    CP Violation: Past, Present, and Future

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    We discuss the history of CP violation and its manifestations in kaon physics, its explanation in terms of phases of the Cabibbo-Kobayashi-Maskawa matrix describing charge-changing weak quark transitions, predictions for experiments involving BB mesons, and the light it can shed on physics beyond the Standard Model.Comment: 13 pages, LaTeX, 8 figures, Invited talk presented at XXI Brazilian National Meeting on Particles and Fields, Sao Lourenco, Minas Gerais, October 23--26, 2000, proceedings to be published in a special issue of the Brazilian Journal of Physics. Further small changes in two figure captions and acknowledgment

    Theoretical Issues in Flavor Physics

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    Quark and lepton flavor physics presents us with a basic question: Can we understand the pattern of masses and mixings of the known quarks and leptons, and how do present and proposed measurements help to advance that goal? Topics discussed include the apparent suppression of new flavor-changing effects, the status of quark and lepton mixing, the implications of new measurements of CP asymmetries in heavy quark decays, the impications of forthcoming experiments on the muon's anomalous magnetic moment and its transitions to an electron, and what we can hope to learn from electric dipole moments.Comment: 11 pages, 3 figures, presentation at the DPF 2013 Meeting of the American Physical Society Division of Particles and Fields, Santa Cruz, California, August 13-17, 2013. One reference update

    BB Physics (Theory)

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    Some theoretical aspects of BB physics are reviewed. These include a brief recapitulation of information on weak quark transitions as described by the Cabibbo-Kobayashi-Maskawa (CKM) matrix, a description of CP asymmetries in BB decays to CP eigenstates and self-tagging modes, a discussion of final-state phases in BB and charm decays, some topics on BsB_s properties and decays, the prospects for unusual excited BB states opened by discovery of some narrow csˉc \bar s resonances, and the prospects for seeing the heavier Q=1/3Q=1/3 quarks predicted in some extended grand unified theories.Comment: 23 pages, LaTeX, 12 figures, invited talk presented at Fourth Tropical Workshop, Cairns, Australia, 9--13 June 2003. Proceedings to be published by AIP. Some updated figure

    M2 signatures in psi(2S) radiative decays

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    The sensitivity of observables in radiative decays psi(2S) -> gamma chi_{1,2} -> gamma gamma J/psi to quadrupole (M2) admixtures in the dominant electric dipole (E1) transitions is explored. Emphasis is placed on distributions in a single angle, and several examples are given.Comment: 8 pages, 4 figures, to be submitted to Phys. Rev. D. Additional data and referenc

    Hadron Spectroscopy - A 2005 Snapshot

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    Some aspects of hadron spectroscopy are reviewed as of summer 2005.Comment: 15 pages, 8 figures, invited talk presented at Physics in Collision 2005, Prague, Czech Republic, July 7-9, 2005. Proceedings to be published by AIP. Uses AIP style files. Typo correcte
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