The Charge Form Factor of the Neutron from the Reaction \pol{2H}(\pol{e},e'n)p

We report on the first measurement of spin-correlation parameters in quasifree electron scattering from vector-polarized deuterium. Polarized electrons were injected into an electron storage ring at a beam energy of 720~MeV. A Siberian snake was employed to preserve longitudinal polarization at the interaction point. Vector-polarized deuterium was produced by an atomic beam source and injected into an open-ended cylindrical cell, internal to the electron storage ring. The spin correlation parameter A^V_{ed} was measured for the reaction \pol{2H}(\pol{e},e'n)p at a four-momentum transfer squared of 0.21 (GeV/c)^2 from which a value for the charge form factor of the neutron was extracted.Comment: 4 pages, 5 file

Measurement of the Neutron Spin Structure Function g1ng_1^n with a Polarized ^3He Target

Results are reported from the HERMES experiment at HERA on a measurement of the neutron spin structure function $g_1^n(x,Q^2)$ in deep inelastic scattering using 27.5 GeV longitudinally polarized positrons incident on a polarized $^3$He internal gas target. The data cover the kinematic range $0.023<x<0.6$ and $1 (GeV/c)^2 < Q^2 <15 (GeV/c)^2$. The integral $\int_{0.023}^{0.6} g_1^n(x) dx$ evaluated at a fixed $Q^2$ of $2.5 (GeV/c)^2$ is $-0.034\pm 0.013(stat.)\pm 0.005(syst.)$. Assuming Regge behavior at low $x$, the first moment $\Gamma_1^n=\int_0^1 g_1^n(x) dx$ is $-0.037\pm 0.013(stat.)\pm 0.005(syst.)\pm 0.006(extrapol.)$.Comment: 4 pages TEX, text available at http://www.krl.caltech.edu/preprints/OAP.htm

The HERMES Spectrometer

The HERMES experiment is collecting data on inclusive and semi-inclusive deep inelastic scattering of polarised positrons from polarised targets of Il, D, and He-3. These data give information on the spin structure of the nucleon. This paper describes the forward angle spectrometer built for this purpose. The spectrometer includes numerous tracking chambers (micro-strip gas chambers, drift and proportional chambers) in front of and behind a 1.3 T.m magnetic field, as well as an extensive set of detectors for particle identification (a lead-glass calorimeter, a pre-shower detector, a transition radiation detector, and a threshold Cherenkov detector). Two of the main features of the spectrometer are its good acceptance and identification of both positrons and hadrons, in particular pions. These characteristics, together with the purity of the targets, are allowing HERMES to make unique contributions to the understanding of how the spins of the quarks contribute to the spin of the nucleon. (C) 1998 Elsevier Science B.V. All rights reserved

Business process analysis with ProM

This demonstration paper describes the ProM process mining tool. Process mining techniques attempt to extract non-trivial and useful process information from so-called "event logs". ProM allows for the discovery of different process perspectives (e.g., control-flow, time, resources, and data) and supports related techniques such as control-flow mining, performance analysis, resource analysis, conformance checking, verification, etc. This makes ProM a practical and versatile tool for business process analysis and discovering

Business process analysis with ProM

This demonstration paper describes the ProM process mining tool. Process mining techniques attempt to extract non-trivial and useful process information from so-called "event logs". ProM allows for the discovery of different process perspectives (e.g., control-flow, time, resources, and data) and supports related techniques such as control-flow mining, performance analysis, resource analysis, conformance checking, verification, etc. This makes ProM a practical and versatile tool for business process analysis and discovering

Spin effects in medium-energy electron-3He scattering.

New physics can be accessed by scattering polarized electrons from a polarize

Evidence for Nuclear Tensor Polarization of Deuterium Molecules in Storage Cells.

Deuterium molecules were obtained by recombination, on a copper surface, of deuterium atoms prepared in specific hyperfine states. The molecules were stored for about 5 ms in an open-ended cylindrical cell, placed in a 23 mT magnetic field, and their tensor polarization was measured by elastic scattering of 704 MeV electrons. The results of the measurements are consistent with the deuterium molecules retaining the tensor polarization of the initial atoms