[en] The results of treatment for 39 consecutive children with retinoblastoma that was diagnosed between 1951 and 1978 were analyzed. Failure to achieve local control within the eye and the development of metastatic disease occurred in seven patients. These patients are considered individually. Delay in diagnosis, older age at presentation, and extraocular extension of disease at diagnosis were associated with treatment failure and were closely interrelated. Modified radiotherapy techniques using wider fields may prevent failure even in those cases diagnosed late and in those with extraocular extension. Indications for intrathecal and systemic chemotherapy in this disease are discussed

[en] The axion emerges in extensions of the Standard Model that explain the absence of CP violation in the strong interactions. Simultaneously, it can provide naturally the cold dark matter in our universe. Several searches for axions and axion-like particles (ALPs) have constrained the corresponding parameter space over the last decades but no unambiguous hints of their existence have been found. The axion mass range below 1 meV remains highly attractive and a well motivated region for dark matter axions. In this White Paper we present a description of a new experiment based on the concept of a dielectric haloscope for the direct search of dark matter axions in the mass range of 40 to 400 $\mathrm{\mu <!--\; ??\; -->}$eV. This MAgnetized Disk and Mirror Axion eXperiment (MADMAX) will consist of several parallel dielectric disks, which are placed in a strong magnetic field and with adjustable separations. This setting is expected to allow for an observable emission of axion induced electromagnetic waves at a frequency between 10 to 100 GHz corresponding to the axion mass.

[en] The air-core Barrel Toroid of the ATLAS Detector at the CERN Large Hadron Collider, is the largest superconducting magnet ever built. This muon-spectrometer magnet consists of 8 discrete coils, arranged symmetrically around the beam axis. The average field is 0.5 T, and the stored energy 1.1 GJ. The windings are 25 m long, 5 m wide and 0.4 m thick. Each coil cold mass consists of 2 double pancakes of aluminum-stabilized NbTi conductor securely fixed in an aluminum alloy casing. Before assembly, each coil is tested individually in the presence of a magnetic mirror to simulate the magnetic forces exerted on the tie rods. This mirror is composed of several iron plates made of magnetically non-linear material. Each coil is enclosed in a separate, stainless-steel cryostat with relative magnetic permeability slightly larger than 1. In this paper the magnetic field distribution and Lorenz forces between the magnetic mirror and the coil in centered and shifted positions are presented. The magnetic influence of the cryostat on the field distribution is also discussed. (authors)

[en] ATLAS is one of the four experiments at the Large Hadron Collider (LHC) at CERN. This experiment has been designed to study a large range of physics including searches for previously unobserved phenomena such as the Higgs Boson and super-symmetry. The ATLAS Muon Spectrometer (MS) is optimized to measure final state muons in a large momentum range, from a few GeV up to TeV. Its momentum resolution varies from (2-3%) at 10-100 GeV/c to 11% at 1 TeV, taking into account the high level background environment, the inhomogeneous magnetic field, and the large size of the apparatus (24 m diameter by 44 m length). A robust muon identification and high momentum measurement accuracy is crucial to fully exploit the physics potential of the LHC. The basic principles of the muon reconstruction packages Muonboy, STACO, MuTag are discussed in this paper. Details of the modifications done in order to adapt the pattern recognition to the cosmic-ray configuration as well as its performance with the recent cosmic-rays and single beam data are presented.

[en] The study of the Z Boson and its decay into two muons at ATLAS provides several interesting aspects. Since the mass and the width of the Z-Boson is known to a very high precision from LEP experiments, Z decays can be used for precision tests of the detector, in particular for alignment issues. Various effects of misalignments in the ATLAS Muon Spectrometer on the reconstructed Z-Boson resonance are discussed. Moreover, the impacts on the precision of muon momentum reconstruction were studied

[en] The DΦ experiment has measured the Υ differential cross section in pp-bar collisions at √ s = 1.8 TeV for |y^Υ| < 0.7. We find the measured cross section to be a factor of five larger than the Ο(α³_s) QCD prediction for p^Υ_Τ > 5 GeV/c. (authors). 7 refs., 2 figs., 2 tabs

[en] A search for squarks and gluinos has been performed using the DΦ detector at the √s = 1.8 TeV Tevatron pp-bar collider. Data from the 1992-1993 collider run corresponding to an integrated luminosity of 13.5 pb^-1 were examined via the missing E_Υ plus jets signature with two separate analyses. No events above Standard Model backgrounds were observed. (author). 9 refs., 3 figs., 3 tabs

[en] We present the results of searches for additional gauge bosons beyond the W and Z bosons using the 1992-1993 Tevatron data set collected with the DΦ detector. The signatures studied are W' -> eν, W' -> τν with τ -> eνν-bar, assuming stable neutrinos; W_R -> e + X and W_R -> eejj, assuming massive neutrinos; and Z' -> ee. Lower limits on the W' mass and Z' mass at the 95 % confidence level, and the mass exclusion contour in the W_R mass vs. neutrino mass plane are presented. (authors). 15 refs., 6 figs

[en] We present measurements of the production cross sections times leptonic branching fractions and the transverse momentum distributions of W and Z bosons in pp-bar collisions at √ s = 1.8 TeV using data collected with the DΦ detector at the Fermilab Tevatron pp-bar collider. A preliminary measurement of the W charge asymmetry is also presented. (authors). 27 refs., 9 figs., 3 tabs

[en] We report on a preliminary measurement of the inclusive dimuon cross section in pp-bar collisions at √ s = 1.8 TeV using the DΦ detector at the Fermilab Tevatron. From these results, we extract the inclusive b-quark production cross section for the kinematic range |y^b| < 1.0 and 9 GeV / c < P^bmin_T < 25 GeV / c. The difference in azimuthal angle in the transverse plane for dimuon pairs from bb-bar production is also shown. (author). 10 refs., 6 figs