Bulletin of the American Physical Society
APS April Meeting 2012
Volume 57, Number 3
Saturday–Tuesday, March 31–April 3 2012; Atlanta, Georgia
Session G9: Charm and Variety 
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Sponsoring Units: DPF Chair: Doreen Wackeroth, SUNY Buffalo Room: Embassy E 
Sunday, April 1, 2012 8:30AM  8:42AM 
G9.00001: Measurement of \(D^0\)\(\bar{D^0}\) Mixing with CDF Nagesh Kulkarni Using CDF Run~II data from \(8.8\,\mathrm{fb}^{1}\) of \(p\bar{p}\) collisions at \(1.96\,\mathrm{TeV}\), we measure the timedependent ratio \(R(t)\) of decay rates \(\Gamma(D^0 \to K^+ \pi^)\) to \(\Gamma(D^0\to K^\pi^+)\) and determine the \(D^0\) mixing parameters \(x'^2\) and \(y'\), along with the significance of their deviation from the nomixing point \((x'^2,y')=(0,0)\). [Preview Abstract] 
Sunday, April 1, 2012 8:42AM  8:54AM 
G9.00002: Observation of $D^0 \to \eta \omega$ Mackenzie Smith, David Cinabro Numerous singlyCabibbosuppressed charm meson decays are as yet unobserved. Here we report the observation of $D^0 \to \eta \omega$ in the CLEO data set. Besides the value of branching fraction of this decays in helping to measure $\eta\eta^\prime$ mixing, it is an important background in $D^0$ Dalitz decays, such as $D^0 \to K^0_s \pi^0 \eta$ which is where we stumbled across it. [Preview Abstract] 
Sunday, April 1, 2012 8:54AM  9:06AM 
G9.00003: Search for flavorchangingneutralcurrent and leptonflavorviolating decays of the $D^0$ meson at BABAR Edward Behn We search for flavorchangingneutralcurrent and leptonflavorviolating decays of the form $D^0 \to \ell^+ \ell'^ V^0$, where $\ell^+ \ell^{\prime}$ may be $\mu^+ \mu^$, $e^+ e^$, or $\mu^\pm e^\mp$ and $V^0$ is a neutral vector meson. Measurements are based on $425 {\rm fb}^{1}$ of electronpositron collision events collected with the BABAR detector at the SLAC National Accelerator Laboratory. [Preview Abstract] 

G9.00004: ABSTRACT WITHDRAWN 
Sunday, April 1, 2012 9:18AM  9:30AM 
G9.00005: An analytic solution to LO coupled DGLAP evolution equations for $F_2^{\gamma p}(x,Q^2)$ and $G(x,Q^2)$ Phuoc Ha We have analytically solved the leadingorder DokshitzerGribovLipatovAltarelliParisi (DGLAP) equations for the $Q^2$ evolution of the structure function $F_2^{\gamma p}(x,Q^2)$ and the gluon distribution $G(x,Q^2)$ using very efficient Laplace transform techniques. Employing the initial distributions $F_2^{\gamma p}(x,Q_0^2)$ and $G(x,Q_0^2)$ fixed by a global fit to the HERA combined data on deep inelastic $ep$ scattering and the very small nonsinglet MSTW2008LO distributions at the initial energy $Q_0^2$, we have calculated the evolved proton structure function $F_2^{\gamma p}(x,Q^2)$ and compared our results with the HERA combined data. [Preview Abstract] 
Sunday, April 1, 2012 9:30AM  9:42AM 
G9.00006: Calculation of $\pi \mu $ atom decay rate as possible background for $K_L \to \pi _0 \nu \overline \nu $ Jia Xu Formation and decay of elementary particle bound states have importance both from theoretical point of view regarding quark sector structure and for rare decay experiment background. The KOTO experiment, dedicated to measuring branching ratio of rare decay$K_L \to \pi _0 \nu \overline \nu $, whose SM prediction branching ratio is $2.4 \times 10^{11}$, is consequently sensitive to background of$K_L \to (\pi ^+\mu ^)_{atom} \overline \nu $, followed by muon capture in the $\pi \mu $ atom. The branching ratio of $\pi\mu$ atom formation has been calculated and measured to be order of 10$^{7}$. The muon capture rate of $\pi \mu $ into $\pi ^{0}\nu $ is calculated and reported for the first time and compared to competing decay modes. [Preview Abstract] 
Sunday, April 1, 2012 9:42AM  9:54AM 
G9.00007: Vanishing dimensions: theory and phenomenology Dejan Stojkovic, Greg Landsberg, Luis Anchordoqui, Malcolm Fairbrain, De Chang Dai Lowerdimensionality at higher energies has manifold theoretical advantages as recently pointed out in our work. Moreover, it appears that experimental evidence may already exists for it  a statistically significant planar alignment of events with energies higher than TeV has been observed in some earlier cosmic ray experiments. If this alignment is not a fluke, then the LHC should be able to see effects associated with the dimensional crossover. Further, (2+1)dimensional spacetimes have no gravitational degrees of freedom, and gravity waves cannot be produced in that epoch in the early universe. This places a universal maximum frequency at which primordial gravity waves can propagate, which may be accessible to future gravitational wave detectors such as LISA. In this talk, the theoretical motivation for ``vanishing dimensions'' as well as generic experimental and observational signature will be discussed. [Preview Abstract] 
Sunday, April 1, 2012 9:54AM  10:06AM 
G9.00008: Vector boson mass generation without new particles Bernd Berg A model of only vector fields with a local U(2) symmetry is introduced for which one finds a massless U(1) photon and a massive SU(2) vector boson in the lattice regularization. Here it is shown that quantization of its classical continuum action leads to perturbative renormalization difficulties, while nonperturbative Monte Carlo calculations favor the existence of a quantum continuum limit. [Preview Abstract] 
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