3,447 research outputs found

    An Asymmetric B Factory at 10^(36) Luminosity

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    The physics opportunities at an asymmetric B Factory operating at the unprecedented luminosity of 10^(36) cm^(–2) s^(–1) are unique and attractive. The accelerator appears to be practical and the challenges of performing a sensitive experiment in this environment can be met

    Super B Factories

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    Heavy-flavor physics, in particular B and τ physics results from the B factories, currently provides strong constraints on models of physics beyond the Standard Model. A new generation of colliders, Super B Factories, with 50 to 100 times the luminosity of existing colliders, can, in a dialog with LHC and ILC, provide unique clarification of new physics phenomena seen at those machines

    First CP Violation Results from BABAR

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    We present a preliminary measurement of time-dependent CP-violating asymmetries in B^0-->J/psi K_S and B^0-->psi(2S) K_S decays recorded by the BABAR detector at the PEP-II asymmetric B Factory at SLAC. The data sample consists of 9.0 fb-1 collected at the Upsilon(4S) resonance and 0.8 fb-1 off-resonance. One of the neutral B mesons, produced in pairs at the Upsilon(4S), is fully reconstructed. The flavor of the other neutral B meson is tagged at the time of its decay, mainly with the charge of identified leptons and kaons. The time difference between the decays is determined by measuring the distance between the decay vertices. Wrong-tag probabilities and the time resolution function are measured with samples of fully-reconstructed semileptonic and hadronic neutral B final states. The value of the asymmetry amplitude, sin(2*beta), is determined from a maximum likelihood fit to the time distribution of 120 tagged B^0-->J/psi K_S and B^0-->psi(2S) K_S candidates: sin(2*beta) = 0.12+/-0.37(stat)+/-0.09(syst).Comment: 19 pages, 10 postscript figures, contributed to the Proceedings of ICHEP200

    We the People': Five Years of Online Petitions

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    Americans are most likely to petition the White House on health care, veterans' issues, illnesses, immigration, animal rights, holidays and criminal investigations, but the actual impact of petitions was modest and varied

    The tracker and calorimeter systems of the Mu2e experiment

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    The Mu2e experiment at Fermilab is a sensitive search for lepton flavor violation via muon-to-electron conversion in the field of an aluminum nucleus. The requirements for the tracking and calorimeter systems of the experiment, as well as the design of systems that fulfill these requirements, are briefly described

    Global Fits of the CKM Matrix

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    We report upon the present status of global fits to Cabibbo-Kobayashi-Maskawa matrix.Comment: 3 pages, 3 figures invited talk presented at EPS conference, Aachen July 17-2
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