Bulletin of the American Physical Society
2005 APS April Meeting
Saturday–Tuesday, April 16–19, 2005; Tampa, FL
Session Z8: Tevatron B Physics Topics |
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Sponsoring Units: DPF Room: Marriott Tampa Waterside Room 4 |
Tuesday, April 19, 2005 3:30PM - 3:42PM |
Z8.00001: Observation and Measurements of Semileptonic$B$ decays to $D^{**}$ Mesons Dmitri Tsybychev Using 460 pb$^{-1}$ of integrated luminosity accumulated with the D\O\ detector, we have observed the semileptonic decays $B \rightarrow \mu \mu D^0_1(2420) X$ and $B \rightarrow \mu \nu D^{*0}_2(2460) X$. The results on their branching rates are presented. [Preview Abstract] |
Tuesday, April 19, 2005 3:42PM - 3:54PM |
Z8.00002: Semileptonic Lifetimes of B Mesons from CDF RUN II Data David Clark A measurement of the B+/-, B0, and Bs mesons' lifetimes are presented using semileptonic decay from $\sim$ 350 pb-1 of data collected by CDF's lepton plus displaced track trigger. The decays of B$\rightarrow$l nu DX, where D is either D0, D*, Ds, are partially reconstructed from a lepton, a displaced track, and a fully reconstructed charm meson. The B+/-, B0, and Bs lifetimes are obtained from an unbinned maximum-likelihood fit to the proper decay length distribution. [Preview Abstract] |
Tuesday, April 19, 2005 3:54PM - 4:06PM |
Z8.00003: First Measurements of polarization in Charmless B to Vector Vector decays at CDF Gianluca De Lorenzo We study samples of $B^0\to\phi K^{\ast 0}$ and $B^0_s\to\phi \phi$ collected in approximately 400 pb-1 of CDF run II data to measure the longitudinal and transverse polarization in these b-s penguin dominated decays. Comparison with analogous B-factories measurement and prospect for future developments are also given. [Preview Abstract] |
Tuesday, April 19, 2005 4:06PM - 4:18PM |
Z8.00004: Ratios of Branching Ratios for Hadronic $b$ Hadron Decays Boris Iyutin The addition of the displaced track trigger at the second trigger level has enabled CDF in Run II to study purely hadronic $b$ hadron decays. We present ratio of branching ratios for $B^+\to\overline{D}^0 \pi^+$, $B^0\to D^-\pi^+(\pi^+\pi^-)$, $B_s\to D_s^-\pi^+(\pi^+\pi^-)$ and $\Lambda_b\to \Lambda_c^-\pi^+$ and first observations of doubly charmed $B$ decays at Hadron Colliders. [Preview Abstract] |
Tuesday, April 19, 2005 4:18PM - 4:30PM |
Z8.00005: $\Upsilon$ Production and Spin Alignment in $p \overline{p}$ Collisions at $\sqrt{s} = 1.96$ TeV Richard Gregory Feild We report on measurements of the $\Upsilon$(1S), $\Upsilon$(2S) and $\Upsilon$(3S) differential cross sections ($d^2\sigma/dp_T dy)_{|y|<0.6}$, as well as on the $\Upsilon$ spin alignment in $p \overline{p}$ collisions at $\sqrt{s} = 1.96$ TeV using a sample of 360~pb$^{-1}$ collected by the CDF II detector. The three resonances were reconstructed through the decay $\Upsilon \rightarrow \mu^{+} \mu^{-}$. [Preview Abstract] |
Tuesday, April 19, 2005 4:30PM - 4:42PM |
Z8.00006: Study of orbitally excited B mesons at CDF Jen Pursley Using over $330~pb^{-1}$ of data collected by the Run II Collider Detector at Fermilab (CDF), we study the properties of the lowest orbitally excited (L = 1) B mesons, collectively denoted as the $B^{**}$. We reconstruct $B^{**}$ candidates in the decay channel $B^{**} \rightarrow B \pi$, $B \rightarrow J/\psi K$, $J/\psi \rightarrow \mu^+ \mu^-$. [Preview Abstract] |
Tuesday, April 19, 2005 4:42PM - 4:54PM |
Z8.00007: Lifetimes in Exclusive $b$ Hadron Decays to $J/\psi$ at CDF Jeff Miles Using exclusive decays such as $B^+ \to J/\psi K^+$ and $B_s \to J/\psi \phi$ collected with the CDF detector,the lifetimes of several different bottom mesons and baryons are measured. Results are comparied with previous measurements and theoretical predictions. [Preview Abstract] |
Tuesday, April 19, 2005 4:54PM - 5:06PM |
Z8.00008: B cross section measurements in lD Jim Kraus We present a new measurement of the B meson production cross section using $80 pb^-1$ of p-pbar collisions at $\sqrt{s}=1.96$ TeV with the CDF detector. Semileptonic B mesons decay modes such as $mu^+D^{*-}$ and $mu^+D0$ are used to isolate a clean sample of semileptonic B decays. The data sample utilized in this analysis was accumulated using a semileptonic trigger which takes advantage of CDF's ability to trigger on displaced tracks. [Preview Abstract] |
Tuesday, April 19, 2005 5:06PM - 5:18PM |
Z8.00009: Measurement of $b$~Quark Fragmentation Fractions in $p\bar p$ Collisions at $\sqrt{s} = 1.96$~TeV Karen Gibson Using $p\bar p$ collision data at $\sqrt{s} = 1.96$~TeV collected with the CDF\,II experiment at the Fermilab Tevatron collider, we present measurements of the fragmentation fractions $f_u$, $f_d$, $f_s$ and $f_{baryon}$ of produced $b$ quarks that yield $B^+$, $B0$, $B0_s$ and $\Lambda_b$ hadrons. Using a data sample enriched in semileptonic $B$ hadron decays, we reconstruct five lepton-charm final states, $\ell D0$, $\ell D^+$, $\ell D^*+$, $\ell D^+_s$ and $\ell \Lambda_c$ to obtain precise measurements of $f_u / f_d$, $f_s / (f_u+f_d)$ and $f_{baryon} / (f_u+f_d)$. [Preview Abstract] |
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