Bulletin of the American Physical Society
2005 APS April Meeting
Saturday–Tuesday, April 16–19, 2005; Tampa, FL
Session J8: Tevatron B Physics II |
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Sponsoring Units: DPF Chair: Kaustabh Agashe Room: Marriott Tampa Waterside Room 4 |
Sunday, April 17, 2005 10:45AM - 10:57AM |
J8.00001: $B_c\rightarrow J/\psi+e^{\pm}$ decays at CDF Masato Aoki The $B_{c}$ meson is the only meson containing two differently flavored heavy quarks. It was first seen by the CDF Collaboration in $110 pb^{-1}$ of data collected at the CDF detector during Run I of the Fermilab Tevatron, in the combined decay mode $B_c\rightarrow J/\psi+\ell^{\pm}X$, followed by $J/\psi\rightarrow \mu^{+}\mu^{-}$. In this study we report on a search for the $B_c$ in the semileptonic decay mode $B_c\rightarrow J/\psi+e^{\pm}X$ using recent CDF data. [Preview Abstract] |
Sunday, April 17, 2005 10:57AM - 11:09AM |
J8.00002: $B_c\rightarrow J/\psi+\mu^{\pm}$ decays at CDF Mark Hartz We report on a study of the $B_c$ meson in the semileptonic decay mode $B_c\rightarrow J/\psi+\mu^{\pm}X$ with $J/\psi\rightarrow \mu^+\mu^-$ using 360 pb$^{-1}$ of data collected at the CDF detector during Run II of the Fermilab Tevatron. We examine the sources of background and report on the status of establishing a $B_c$ signal over the predicted background. The possible uses of the data to determine the $B_c$ lifetime, mass, and the ratio $\frac{\sigma BR(B_c\rightarrow J/\psi \mu^{\pm} X)}{\sigma BR(B^{\pm}\rightarrow J/\psi K^{\pm})}$ are discussed and some preliminary results presented. [Preview Abstract] |
Sunday, April 17, 2005 11:09AM - 11:21AM |
J8.00003: Properties of the $B_c$ Meson Sherry Towers Using more than 250~pb$^{-1}$ of data collected with the D\O\ detector in Run II of the Tevatron, we study the $B_c^+$ meson in the $J/\psi \mu^+ \nu$ and $J/\psi \pi^+$ final states. We use these events to measure the mass and the lifetime of the $B_c$. [Preview Abstract] |
Sunday, April 17, 2005 11:21AM - 11:33AM |
J8.00004: Preliminary lifetime measurement of the $B^0_s \rightarrow D_s \mu X$ decay channel Marco Carrasco-Lizarraga From February 2002 to August 2004, the D\O\ detector has collected about 400~pb$^{-1}$ of high quality $p\bar{p}$ interactions. Using this data, we have reconstructed over 5000 $B^0_s \rightarrow D_s \mu X$ ($D_s \rightarrow \phi \pi$) decays, one of the largest samples of $B^0_s$ candidates in the world. Using this sample, we present a measurement of the $B^0_s$ lifetime that is competitive with the world average lifetime. Published lifetime results of exclusive decays $B^0_s \rightarrow J/\psi \phi$ and $\Lambda^0_b \rightarrow J/\psi \Lambda_0$ are also covered. [Preview Abstract] |
Sunday, April 17, 2005 11:33AM - 11:45AM |
J8.00005: Search for rare flavor-changing and penguin decays of the $B^0_s$ meson Ralf Bernhard Using data collected with the D\O\ detector in Run II of the Tevatron, limits are presented for searches for the rare flavour changing neutral current decay $B^0_s \rightarrow \mu^+ \mu^-$, as well as $B^0_s \rightarrow \mu^+ \mu^- \phi$. The former decay mode is particularly sensitive to supersymmetric extensions of the Standard Model. For the latter mode, a measurement of the branching ratio could validate the prediction of the Standard Model. [Preview Abstract] |
Sunday, April 17, 2005 11:45AM - 11:57AM |
J8.00006: Lifetime in $B_s\rightarrowK^+K^-$ decay Nicola Pounder $B_s\rightarrow K^+K^-$ is nearly entirely a CP even eigenstate, so the Bs lifetime measured in this decay should be short compared to the average Bs lifetime. At run II of the Fermilab Tevatron, CDF's hadronic trigger will collect a sample of $B_s\rightarrowK^+K^-$ events from p pbar collisions at $\sqrt{1.96}$ TeV. This trigger may, however, bias a measurement of lifetime. We present an approach to correct for this bias and discuss the challenges of separating this mode from the physics decay backgrounds and prospects for a lifetime measurement. [Preview Abstract] |
Sunday, April 17, 2005 11:57AM - 12:09PM |
J8.00007: $B_s$ Mixing Results for Hadronic and Semileptonic Decays Nuno Leonardo We report preliminary results for $B_s$ oscillation in Run II CDF. About 360 pb$^{-1}$ of the data are collected in 2002-2004 with the CDF detector at the Fermilab Tevatron collider. Triggers based on precise on-line tracking using silicon detector information are implemented in CDF Run-II in order to capture the hadronic and semileptonic decay modes of $B_s$ meson more efficiently. We also estimate our sensitivity including straight forward improvements of our first results. [Preview Abstract] |
Sunday, April 17, 2005 12:09PM - 12:21PM |
J8.00008: Study of $B_{s}$ to $\psi{\prime}\phi$ decays Daejung Kong We have searched for $B_{s} \rightarrow \psi(2s) \phi$ decays in $p \overline{p}$ collisions at $\sqrt{s} = 1.96$ TeV, using $360~ pb^{-1}$ of data from the CDF II detector at the Fermilab Tevatron. The $B_{s} \rightarrow J/\psi \phi$ mode is used for normalization, while $B^{\pm} \rightarrow \psi(2s)K^{\pm}$ and $B^{\pm} \rightarrow J/\psi K^{\pm}$ modes are used as control samples. [Preview Abstract] |
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