Use of Radio Occultation to Evaluate Atmospheric Temperature Data from Spaceborne Infrared Sensors

With its high accuracy, stability, and worldwide coverage GPS radio occultation offers an attractive means of independently validating and calibrating the world's premier weather and climate sensors. These include such instruments as AIRS, AMSU, and MODIS on NASA's EOS platforms, and similar systems on operational weather satellites. GPSRO also offers a valuable comparison standard for global weather analyses, such as those produced by NOAA's National Center for Environmental Predictions (NCEP) and the European Centre for Medium-RangeWeather Forecasts (ECMWF)

Charmonium Spectroscopy from Inclusive psi-prime and J/psi Radiative Decays

Results from a detailed study using the Crystal Ball detector at the SLAC e+e− storage ring SPEAR of the inclusive photon spectra from 1.8×106 ψ’ and 2.2×106 J/ψ decays are presented. Radiative transitions from the ψ’ to the χ2,1,0 states are observed with photon energies of 126.0±0.2±4, 169.6±0.3±4, and 258.4±0.4±4 MeV and branching ratios B(ψ’→γχ2,1,0) =(8.0±0.5±0.7)%, (9.0±0.5±0.7)%, and (9.9±0.5±0.8)%, respectively. Values for the natural linewidths of the χ states are obtained: Γ(χ2,1,0)=0.8–4.9, <3.8, and 13–21 MeV, respectively (90% C.L.). Improved values are found for the branching ratios B(ψ’→γηc) =(0.28±0.06)% and B(J/ψ→γηc)=(1.27±0.36)%, and for the natural width Γ(ηc)=11.5±4.5 MeV

Spin Analysis of the χ(b\chi(b) States

Angular correlations in the cascade reaction e+e−→Υ(2S)→γχb, χb→γΥ, Υ→μ+μ− or Υ→e+e−, have been used for the first time to investigate the spins of the χb states. The results support the χb spins predicted by the potential models of heavy quarkonia

Measurement of the Properties of the eta' and Search For Other Resonances In Gamma-gamma -> eta pi0 pi0

The reaction e+e- -> e+e- eta pi0 pi0 has been observed with the Crystal Ball detector at the DORIS II storage ring at DESY. The eta pi0 pi0 mass spectrum is dominated by the eta', and the two-photon width Gamma(eta' -> gamma gamma) is determined to be 4.6+-0.4+-0.6 keV. Limits on Gamma(X ->gamma gamma) x B(X -> eta pi pi) are given for other possible states

Formation of the Pseudoscalars pi0, eta, and eta' In the Reaction gamma gamma -> gamma gamma

The Crystal Ball detector has been used at the DORIS II storage ring at DESY to study the reaction e+ e- -> e+ e- gamma* gamma* -> e+ e- X -> e+ e- gamma gamma, where X is a narrow resonance with mass between 100 and 3000 MeV. Formation of pi0, eta and eta' mesons is observed, and the following meson partial widths are obtained: Gamma(pi0 -> gamma gamma) = 7.7+-0.5+-0.5 eV, Gamma(eta -> gamma gamma) = 0.514+-0.017+-0.035 keV, and Gamma(eta' -> gamma gamma) = 4.7+-0.5+-0.5 keV. No other narrow resonances are observed, and upper limits are given for the product Gamma(X -> gamma gamma) B(X -> gamma gamma)

Determination of Γee\Gamma_{ee} of the Υ\Upsilon (1S) and Υ\Upsilon (2S) Resonances and Measurement of R at W=9.39 GeV

Using the Crystal Ball detector operating at the DORIS II storage ring we have measured the leptonic partial widthsГeeof the Υ(1S) and Υ(2S) reso

Observation of a new ηπ0π0\mathrm{\eta \pi^0\pi^0} resonance at 1900 MeV/c2\mathrm{MeV/c^2} in two-photon scattering

Using the Crystal Ball detector at the DORIS II $e^+e^−$ storage ring, we measure the $ηπ^0π^0$ mass spectrum in the reaction $e^+e^−→e^+e^−ηπ^0π^0→e^+e^−6γ$ from the ηπ0π0 threshold to about 2500 MeV/c$^2$. The spectrum is dominated by the η′, for which we determine $Γγγ(η′)BR(η'→6γ)=0.36±0.02±0.03$ keV. In addition, we observe an enhancement in the cross section near 1900 MeV/c$^2$ which we attribute to the two-photon production of a new resonance X(1900). The angular distributions and the invariant mass distribution of the ηπ0 subsystem are consistent with those expected for the hypothetical η2 meson with $JPC=2\pm$. For this JP assignment the resonance parameters are M(X) = 1876 ±35±50 MeV/c$^2$, Γtot(X)=228±90±34 MeV/c$^2$ and $Γγγ(X)BR(X→ηππ) = 0.9±0.2±0.3$ keV

Observation of a new eta pi0 pi0 resonance at 1900 MeV/c^2 in two-photon scattering

Using the Crystal Ball detector at the DORIS II e+e- storage ring, we measure the ηπ 0π 0 mass spectrum in the reaction e+e- -&gt; e+e- eta pi0 pi0 -&gt; e+e- 6gamma from the eta pi0 pi0 threshold to about 2500 MeV/c 2. The spectrum is dominated by the eta′, for which we determine Gamma(gamma gamma)(eta') BR(eta' -&gt; 6 gamma)=0. 36+-0.02+-0.03 keV. In addition, we observe an enhancement in the cross section near 1900 MeV/c 2 which we attribute to the two-photon production of a new resonance X(1900). The angular distributions and the invariant mass distribution of the eta pi0 subsystem are consistent with those expected for the hypothetical eta2 meson with J(PC)=2(-+). For this J(P) assignment the resonance parameters are M(X)=1876+-35+-50 MeV/c 2, Gamma-tot(X)=228+-90+-34 MeV/c 2 and Gamma(gamma gamma)(X) BR(X -&gt; eta pi pi)=0.9+-0.2+-0.3 keV