181603509
MUONIC ATOM FINAL STATE PROBABILITIES AFTER FISSION. (TALK, ABSTRACT ONLY)
122632213
Calculation of muon final-state probabilities after muon-induced fission
Abstract Experiments have shown that in muonic uranium-238 fission the μ − is bound mainly to the heavy fragment with a few percent of cases of binding to the light fragment. We use time-dependent perturbation theory to calculate the theoretical branching for a variety of fission asymmetries and fission fragment dynamical conditions. We go beyond earlier theoretical works in that we study extended nuclear charge distributions as well as point charges. Agreement with experiment is within the limits of error.
5862127
Detection of very small neutrino masses in double-beta decay using laser tagging
Abstract We describe an approach to the study of neutrino masses that combines quantum optics techniques with radiation detectors to obtain unprecedented sensitivity. With it the search for Majorana neutrino masses down to ∼10 meV will become accessible. The experimental technique uses the possibility of individually detecting Ba + -ions in the final state of 136 Xe double-beta decay via resonant excitation with a set of lasers aimed at a specific location in a large Time Projection Chamber. The specificity of the atomic levels provides tagging and, together with more traditional event recognition parameters, greatly suppresses radioactive backgrounds.
122344464
Review of the hybrid photo diode tube (HPD): An Advanced light detector for physics
The HPD is a nonmultiplicative light detector with typical gain of 1000 to 5000. Its development project, mainly supported by the CERN LAA project and by the INFN group V, was originally intended to find a replacement for the photo multiplier (PM) tubes for scintillating fibre calorimeter readout. After five years of development the HPD has become a versatile light detector, commercially available for everyday use, that can outperform PM tubes in photon counting efficiency and resolution, multi tesla magnetic field operation, uniformity of response, fast pulse dynamic range, and gain stability. The HPD has also a wide edge on PMs on pixelization potential and it is getting more and more competitive on timing properties. A review of the HPD performances and its latest advances are reported.
17730775
High performance Beowulf computer for lattice QCD
Abstract We describe the construction of a high performance parallel computer composed of PC components, as well as the performance test in lattice QCD.
113696862
PHENIX: Preliminary conceptual design report
53631567
Probing deviations from general relativity with the Euclid spectroscopic survey
We discuss the ability of the planned Euclid mission to detect deviations from General Relativity using its extensive redshift survey of more than 50 Mi llion galaxies. Constraints on the gravity theory are placed measuring the growth rate of struc ture within 14 redshift bins betweenz = 0.7 andz = 2. The growth rate is measured from redshift-space distortio ns, i.e. the anisotropy of the clustering pattern induced by coherent pe culiar motions. This is performed in the overall context of the Euclid spectroscopic survey, w hich will simultaneously measure the expansion history of the universe, using the power spect rum and its baryonic features as a standard ruler, accounting for the relative degeneracies of expansion and growth parameters. The resulting expected errors on the growth rate in the different redshift bins, expressed through the quantity fσ8, range between 1.3% and 4.4%. We discuss the optimisation of the survey configuration and investigate the important depende nce on the growth parameterisation and the assumed cosmological model. We show how a specifi c parameterisation could actually drive the design towards artificially restricted r egions of the parameter space. Finally, in the framework of the popular “γ parameterisation”, we show that the Euclid spectroscopic survey alone will already be able to provide substantial evidence (in Bayesian terms) if the growth index differs from the GR value γ = 0.55 by at least � 0.13. This will combine with the comparable inference power provided by the Euclid weak lensing survey, resulting in Euclid’s unique ability to provide a decisive test of modi fied gravity.