122041574
Multi-pixel hybrid photodiode tubes for the CMS hadron calorimeter
Abstract Avalanche Photodiodes and 7-channel HPDs from DEP were installed on a prototype CMS HCAL and their response to muons, electrons and pions was measured in a test beam. DC response to a radioactive source used to calibrate the tiles was also studied. Increase in leakage current in the HPD from an integrated dose of 10 13 neutrons/cm 2 was observed using a Cf source.
26570396
Measurement of the inclusive semielectronic D0 branching fraction.
42871335
Search for exclusive b-->u semileptonic decays of B mesons.
Using a sample of 935000 BB pairs collected with the CLEO-II detector at the Cornell Storage Ring, we have obtained upper limits on the branching ratios for the b→ul - υ#58 processes B - →ωl - υ#58, B - →ρ 0 l - υ#58, and B 0 →ρ + l - υ#58. The combined result using the relationships among the widths for these three modes is B(B - →ρ 0 l - υ#58)<(1.6-2.7)×10 -4 at 90% C. L., where the range of value to model dependence of the detection efficiencies. These measurements yield the limits |V ub /V cb |<0.08-0.13
199679707
Measurement of muon plus proton final states in $\nu_{\mu}$ Interactions on Hydrocarbon at $ $ = 4.2 GeV
2389726
Search for B0 decays to two charged leptons.
We have searched for [ital B][sup 0] decays to two charged leptons and set 90% confidence level upper limits on the branching fractions: [ital B]([ital B][sup 0][r arrow][ital e][sup +][ital e][sup [minus]])[lt]5.9[times]10[sup [minus]6], [ital B]([ital B][sup 0][r arrow][mu][sup +][mu][sup [minus]])[lt]5.9[times]10[sup [minus]6], [ital B]([ital B][sup 0][r arrow][ital e][sup [plus minus]][mu][sup [minus plus]]) [lt]5.9[times]10[sup [minus]6], [ital B]([ital B][sup 0][r arrow][ital e][sup [plus minus]][tau][sup [minus plus]])[lt]5.3[times]10[sup [minus]4], and [ital B]([ital B][sup 0][r arrow][mu][sup [plus minus]][tau][sup [minus plus]])[lt]8.3[times]10[sup [minus]4].
108864186
MINOS near-detector coil design
The 980-ton MINOS near detector will be installed in the new NuMI near hall at 100m below grade at Fermilab. It will be assembled from 282 1-inch thick steel plates. The planes are made from low carbon (1006), hot rolled steel and are toroidally magnetized. Each plane will be hung by two 'ears', which are extensions of the octagonal plane structure, similar to the hanging files in a file drawer. The plates have a center-to-center spacing of 5.94 cm. This document has been prepared for the 8/99 Conceptual Design Review of the MINOS near detector coil. It's main goal is to provide a set of references to previous documents and to assemble various design drawings and engineering calculations that have not been included in previous technical memos. It also provides some background material relevant for the coil implementation. Much of the text for this document is edited from the MINOS Detectors Technical Design Report.
123231602
Covariant canonical formalism for the group manifold
A canonical formalism is developed for the exterior calculus on differential forms using the group manifold approach. The formalism is naturally invariant under coordinate transformations, i.e., there is no preferred time direction. The Lagrangian density is again found to be degenerate and we discuss the resulting constraints a la Dirac. The Hamiltonian formalism is introduced using a bracket operation, defined for differential forms.
36038168
Global constants in (2+1)-dimensional gravity
The extended conformal algebra so(2, 3) of global, quantum, constants of motion in (2+1)-dimensional gravity with topology R x T 2 and negative cosmological constant is reviewed. It is shown that the ten global constants form a complete set by expressing them in terms of two commuting spinors and the Dirac y matrices. The spinor components are the globally constant holonomy parameters, and their respective spinor norms are their quantum commutators.