11,591 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 fbβˆ’1^{-1} of pΛ‰p\bar{p}p collisions at s=1.96TeV\sqrt{s}=1.96 \rm{TeV}. We report the first observation of the Bs0β†’Kβˆ’Ο€+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: Ξ›b0β†’pΟ€βˆ’\Lambda^{0}_{b} \to p\pi^{-} and Ξ›b0β†’pKβˆ’\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 ppΛ‰p\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+eβˆ’e^+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 Bs0β†’pi+Ο€βˆ’B^0_s \to pi^+\pi^-, and the first reconstruction in hadron collisions of the suppressed decays Bβˆ’β†’D(β†’K+Ο€βˆ’)Kβˆ’B^- \to D(\to K^+\pi^-)K^- and Bβˆ’β†’D(β†’K+Ο€βˆ’)Ο€βˆ’B^- \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 ppΛ‰p\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+eβˆ’e^+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, bβ†’sb\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
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