18,627 research outputs found

    Branching fractions and direct CP asymmetries of charmless decay modes at the Tevatron

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    We present new CDF results on the branching fractions and time-integrated direct CP asymmetries for B0B^{0} and Bs0B^{0}_{s} decay modes into pairs of charmless charged hadrons (pion or kaon). The data set for this update amounts to 1 fb1^{-1} of pˉp\bar{p}p collisions at s=1.96TeV\sqrt{s}=1.96 \rm{TeV}. We report the first observation of the Bs0Kπ+B^{0}_{s} \to K^{-}\pi^{+} mode and a measurement of its branching fraction and direct CP asymmetry. We also observe for the first time two charmless decays of bb-baryon: Λb0pπ\Lambda^{0}_{b} \to p\pi^{-} and Λb0pK\Lambda^{0}_{b} \to pK^{-}.Comment: Proceedings for Beauty 2006, Sept. 25-29 at Oxford University, to be published in Nucl. Phys. (Proc. Suppl.). FERMILAB-CONF-06-471-E. Dec 2006. 6p

    Updated measurements of hadronic B decays at CDF

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    The CDF experiment at the Tevatron ppˉp\bar{p} collider established that extensive and detailed exploration of the bb--quark dynamics is possible in hadron collisions, with results competitive and supplementary to those from e+ee^+e^- colliders. This provides a rich, and highly rewarding program that has currently reached full maturity. In the following I report some recent results on hadronic decays: the evidence for the charmless annihilation decay mode Bs0pi+πB^0_s \to pi^+\pi^-, and the first reconstruction in hadron collisions of the suppressed decays BD(K+π)KB^- \to D(\to K^+\pi^-)K^- and BD(K+π)πB^- \to D(\to K^+\pi^-)\pi^-.Comment: 5 pages,2 figures, proceedings for EPS-HEP 2011. To be published in the on-line journal Proceedings of Scienc

    B Physics at the TeVatron

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    The CDF and D\O\ experiments at the Tevatron ppˉp\bar{p} collider established that extensive and detailed exploration of the bb--quark dynamics is possible in hadron collisions, with results competitive and supplementary to those from e+ee^+e^- colliders. This provides a rich, and highly rewarding program that is currently reaching full maturity. I report a few recent world-leading results on rare decays, CP-violation in Bs0B^0_s mixing, bsb\to s penguin decays, and charm physics.Comment: 5 pages, 1 figure, proceedings for IFAE2011. To be published in the Nuovo Cimento C - Colloquia on Physic

    CP and charge asymmetries at CDF

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    We present CDF results on the branching fractions and time-integrated direct CP asymmetries for B0 and B0s decay modes into pairs of charmless charged hadrons (pions or kaons). We report also the first observation of B0s->DsK mode and the measurement of its branching fraction.Comment: Proceedings of The 2007 Europhysics Conference on High Energy Physics Manchester, England 19-25 July 2007. To be published electronically by IoP Journals. FERMILAB-CONF-07-590-E. Nov 2007. 3p

    Reading, Writing, and Breathing

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    This report looks at the distribution of air toxics, respiratory hazard, and school children in the state of California. The report finds evidence of disproportionate exposure and a potential link between such exposure and school-level academic performance, and calls for policy changes that can better situate environmental health concerns within initiatives for school improvement

    Still Toxic After All These Years: Air Quality and Environmental Justice in the San Francisco Bay Area

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    From West Oakland's diesel-choked neighborhoods to San Francisco's traffic-snarled Mission District to the fenceline communitis abutting Richmond's refineries, poor and minority residents of the San Francisco Bay Area get more than their share of exposure to air pollution and environmental hazards. That's the conclusion of a new report issued by the Center for Justice, Tolerance & Community (CJTC) at the University of California, Santa Cruz. The first published analysis of the overall state of environmental disparity in the nine-county region, the report is entitled, "Still Toxic After All These Years... Air Quality and Environmental Justice in the Bay Area.

    Minding The Climate Gap: What's at Stake if California's Climate Law isn't Done Right and Right Away

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    Minding the Climate Gap: What's at Stake if California's Climate Law isn't Done Right and Right Away details how incentivizing the reduction of greenhouse gases -- which cause climate change -- from facilities operating in the most polluted neighborhoods could generate major public health benefits. The study also details how revenues generated from charging polluters could be used to improve air quality and create jobs in the neighborhoods that suffer from the dirtiest air. In California, children in poverty, together with all people in poverty, live disproportionately near large facilities emitting toxic air pollution and greenhouse gases.People of color in the state experience over seventy percent more of the dangerous pollution coming from major greenhouse gas polluters as whites, and the disparity is particularly sharp for African Americans. The racial differential in proximity to pollution is not just a function of income: people of color are more likely to live near these polluting facilities than whites with similar incomes. Continuing to move forward with California's climate law presents the opportunity to save lives and bolster California's economy by focusing pollution reductions in neighborhoods suffering the worst public health impacts
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