121721417
A track fitting method for particles in non-uniform magnetic fields
Abstract A new method of fitting particle trajectories in non-uniform magnetic fields is described. It is assumed that measured points in three-dimensional space have already been obtained. The trajectory is broken into segments within which the magnetic field may be regarded as a linear function, for which an approximate analytic form of the trajectory is derived. With this form and its derivatives, a Newton-Rapheson iteration is carried out to minimize the sum of the squares of deviations of observed points from the trajectory. The method described has been used in a spark chamber experiment investigating K e4 and K πee decays.
124266533
Observation of mu e Events in anti-neutrino and Neutrino Interactions in the Fermilab 15-Foot Neon-H Bubble Chamber
34597488
Left-right asymmetry in neutrino-produced hadron jets.
In an experiment (E546) to study interactions of {l angle}{ital E}{r angle}=100 GeV and {l angle}{ital Q}{sup 2}{r angle}=17 GeV{sup 2} neutrinos in the Fermilab 15-foot bubble chamber, we have looked for a left-right asymmetry in the azimuthal angle {phi} of individual hadrons about the direction of the lepton momentum transfer ({ital q} vector). Significant asymmetry is found for forward positive hadrons; for {ital x}{sub {ital F}}{gt}0.10, we find {l angle}cos{phi}{r angle}={minus}0.029{plus minus}0.008, where {ital x}{sub {ital F}} is the Feynman {ital x} variable. Negative hadrons with {ital x}{sub {ital F}}{gt}0.10 show no asymmetry, {l angle}cos{phi}{r angle}=0.004{plus minus}0.011. A model which includes parton intrinsic transverse momentum {ital k}{sub {ital t}} reproduces the asymmetry of combined positive and negative hadrons with {ital x}{sub {ital F}}{gt}0.10, {l angle}cos{phi}{r angle}={minus}0.018{plus minus}0.0065, if {l angle}{ital k}{sub {ital t}}{sup 2}{r angle}=0.065{plus minus}0.024 GeV{sup 2}/c{sup 2}. But the model predicts almost equal asymmetries for positive and negative hadrons. The model also agrees poorly with the observed dependence on the kinematic variables {ital x} and {ital Q}{sup 2} if the {ital k}{sub {ital t}} distribution is assumed to be independent of kinematic variables.
109454532
Online monitoring of laserpulses using the GPIB-interface of a Tektronix 2430 Digital Storage Oscilloscope
One of the monitoring aspects of holography at the 15 foot Bubble Chamber is the online checking of the lightoutput of the JK2000 ruby laser. Ideally the lightoutput should be a squared pulse in time. Spikes, pre- and postlasing (i.e., lasing before and after the squared pulse) can have a negative influence on the holograms. The scheme for monitoring the lightoutput is discussed in this paper as well as the programming codes and experimental setup necessary to enhance the holography. 1 fig.
125826043
Study of Hadronic Systems Produced in electron-neutrino (anti-electron-neutrino) n e Interactions
117257163
DECAYS OF THE eta MESON
122601142
SVX', the new CDF silicon vertex detector
Abstract The Collider Detector at Fermilab (CDF) radiation hardened silicon vertex detector (SVX') is described. The new detector has several improvements over its predecessor such as better signal to noise and higher efficiency. It is expected to have a radiation tolerance in excess of 1 Mrad. It has been taking data for several months and some preliminary results are shown.
124792007
A Measurement of $B$ Meson Oscillations Using Inclusive Leptons in $p\bar{p}$ Collisions at 1.8-TeV