Bulletin of the American Physical Society
2006 73rd Annual Meeting of the Southeastern Section of the APS
Thursday–Saturday, November 9–11, 2006; Williamsburg, Virginia
Session EB: High Energy Physics I |
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Chair: Stefan Spanier, University of Tennessee-Knoxville Room: Williamsburg Hospitality House Jamestown |
Thursday, November 9, 2006 4:15PM - 4:27PM |
EB.00001: Search for New Physics with Gluonic Penguin $B$ Decays Giordano Cerizza, Mahalaxmi Krishnamurthy Charmless $B$-meson decays such as $B\to \eta^\prime K$ and $B\to \phi K$ are dominated by transitions into a $s$-quark and a gluon via internal $W$-quark loops. In these loops new particles and forces as e.g. predicted by supersymmetric models can contribute virtually. This provides an opportunity to detect such New Physics as deviation of $CP$ asymmetries from Standard Model expectations and with negligible or small hadronic uncertainties. The BaBar collaboration has now accumulated more than 350 million $\bar{B}B$ events at the $\Upsilon(4S)$ resonance. To overcome the rareness of these charmless $B$ decay final states we have reconstructed many sub-decay modes and additional similar penguin decays. We present the new $CP$ measurements in the $\eta^\prime K$ and $\phi (K^+K^-)K$ final states. With time-dependent $B$-decay Dalitz plot analyses we expand the spectrum of penguin decays. [Preview Abstract] |
Thursday, November 9, 2006 4:27PM - 4:39PM |
EB.00002: ABSTRACT WITHDRAWN |
Thursday, November 9, 2006 4:39PM - 4:51PM |
EB.00003: Towards a BF and Form Factor Measurement in $D^0\to K^{\ast -}e^+\nu _e $ Decays Hongxuan Liu, Milind Purohit Using data from the BaBar experiment, we study form factors in $D^0\to K^{\ast -}e^+\nu _e $ decays. These form factors, which are Lorentz-invariant functions of $q^2$, are predicted in several models. We present preliminary results for the parameters r$_{2}$ and r$_{V}$ based on roughly 300 fb$^{-1}$ of BaBar data. The high statistics allow us to make a significant improvement over the precision of previous results. [Preview Abstract] |
Thursday, November 9, 2006 4:51PM - 5:03PM |
EB.00004: Measurement of $D^0$ decays to $K^0\pi^0$ at Belle Manmohan Dash We present a measurement of the ratio of $D^0$ decay rates into K$^0_L \pi^0$ and K$^0_S \pi^0$ final states. This ratio can be used to disentangle the Cabibbo favored $D^0 \rightarrow \overline{K}^0 \pi^0$ and doubly Cabibbo suppressed $D^0 \rightarrow K^0 \pi^0$ amplitudes, and contributes to the important goal of constraining the strong phase $\delta_{K \pi}$ between $D^0 \rightarrow K^- \pi^+$ and $D^0 \rightarrow K^+ \pi^-$. The measurement is based on data accumulated by the Belle detector at the KEKB $e^+ e^-$ collider. [Preview Abstract] |
Thursday, November 9, 2006 5:03PM - 5:15PM |
EB.00005: ABSTRACT WITHDRAWN |
Thursday, November 9, 2006 5:15PM - 5:27PM |
EB.00006: Search for CP Violation in Hyperon Decays with the HyperCP Spectrometer at Fermilab Edmond Dukes Searches for experimental manifestations of CP violation have born much fruit in recent years with the discovery of direct CP violation and the first evidence of CP violation outside of the neutral kaon system. Nevertheless we still know little about CP violation: its origin remains a mystery and there is little hard evidence that it is the sole province of the Standard Model. Searches for CP violation in hyperon decays offer promising possibilities as they are sensitive to certain beyond-the-Standard-Model sources that are not probed in other systems. We report on results from the HyperCP experiment, which is making high-statistics searches with data samples a thousand times larger than any previously taken, measurements that are beginning to confront beyond-the-Standard-Model theory predictions. [Preview Abstract] |
Thursday, November 9, 2006 5:27PM - 5:39PM |
EB.00007: Study of $Z\gamma$ Production at the Tevatron Jefferson Kist We have studied the production of Z bosons with associated high energy photons using data collected by the CDFII detector at the Tevatron. The analysis uses the reaction $p\bar{p}$ $\to e^+ e^- \gamma$ + X at $\sqrt{s}$ = 1.96 TeV with 1 $fb^{-1}$ of integrated luminosity. Properties of these events will be discussed with an emphasis on reduction of backgrounds in the high energy photons due to hadronic jets. [Preview Abstract] |
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