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Calculation of molecular final states and their effect on a precision neutrino mass experiment

Description: An experiment to determine the electron neutrino mass is being performed with the precision of a few electron volts by measuring the tritium beta decay energy distribution near the endpoint. At the few electron volt level, a major consideration in the choice of a tritium source is the effect of excited final atomic or molecular states on the beta decay distribution. It is important to choose a source for which the initial and final states can be accurately calculated. Frozen tritium was chosen as the source since the states of molecular tritium and those of the HeT/sup +/ daughter ion have electronic wavefunctions that can be calculated with high accuracy. The effects of final excited states on the neutrino mass determination and the results of these calculations are described.
Date: February 1, 1984
Creator: Fackler, O.; Mugge, M.; Sticker, H.; Winter, N. & Woerner, R.
Partner: UNT Libraries Government Documents Department

Problems and progress in tritium beta decay

Description: It has been nearly eight years since the group led by Lubimov first saw evidence for a finite neutrino mass in the tritium beta decay spectrum. Their measurement provided a great stimulus to the field; the number of experiments currently underway reflects the significance of their claim. The fact that further data are only now beginning to appear reflects the difficulty of this measurement. As an introduction to related papers in these proceedings, we briefly consider the key elements involved in neutrino-mass measurements using tritium beta decay and list the experiments currently underway in the field. 5 refs., 1 tab.
Date: April 1, 1988
Creator: Balke, B.; Fackler, O.; Mugge, M. & White, R.
Partner: UNT Libraries Government Documents Department

A STUDY OF THE K0(L) STRONG INTERACTIONS IN THE MOMENTUM REGION 60-360 GeV/c

Description: We propose to design, build and use a tertiary K{sub L}{sup 0} beam produced using the high intensity pion beam being built in the proton area. The main advantage of this beam over previous beam is the low neutron background (K{sub L}/n > 3). We propose to study the large transverse momentum dependence of the particles produced in the strong interactions of a K{sub L}{sup 0} beam, and also the production of leptons, and lepton pairs.
Date: October 1, 1974
Creator: Bartlett, D.; Morse, R.; McQuate, D.; Mugge, M.; Nauenberg, U. & U., /Colorado
Partner: UNT Libraries Government Documents Department

Experiment to measure the electron neutrino mass using a frozen tritium source

Description: We are performing an experiment to determine the electron neutrino mass with the precision of a few eV by measuring the tritium beta decay energy distribution near the endpoint. Key features of the experiment are a 2 eV resolution electrostatic spectrometer and a high-activity frozen tritium source. It is important that the source have electronic wavefunctions which can be accurately calculated. These calculations can be precisely made for tritium and the HeT/sup +/ daughter ion and allow determination of branching fractions to 0.1% and energy of the excited states to 0.1 eV. We discuss the excited final molecular state calculations and describe the experimental apparatus. 2 references, 6 figures.
Date: March 1, 1985
Creator: Fackler, O.; Mugge, M.; Sticker, H.; White, R.M. & Woerner, R.
Partner: UNT Libraries Government Documents Department

Experiment to measure the electron neutrino mass using frozen tritium

Description: We are performing an experiment to determine the electron neutrino mass with the precision of a few eV by measuring the tritium beta decay energy distribution near the endpoint. To make this measurement, we have built a spectrometer with a resolution of 2 eV. Our source is frozen tritium since tritium and the HeT/sup +/ daughter ion have electronic wavefunctions that can be calculated with high accuracy. We describe the experiment and discuss the excited final molecular state calculations.
Date: January 1, 1985
Creator: Fackler, O.; Sticker, H.; Mugge, M.; White, R.M. & Woerner, R.
Partner: UNT Libraries Government Documents Department

Molecular effects in the neutrino mass determination from beta-decay of the tritium molecule

Description: Molecular final state energies and transition probabilities have been computed for beta-decay of the tritium molecule. The results are of sufficient accuracy to make a determination of the electron neutrino rest mass with an error not exceeding a few tenths of an electron volt. Effects of approximate models of tritium beta-decay on the neutrino mass determination are discussed. 14 refs., 3 figs., 1 tab.
Date: March 1, 1986
Creator: Fackler, O.; Jeziorski, B.; Kolos, W.; Szalewicz, K.; Monkhorst, H.J. & Mugge, M.
Partner: UNT Libraries Government Documents Department

Status report on the Livermore-Rockefeller-Fermilab neutrino mass experiment

Description: An experiment is being performed to determine the electron neutrino mass with the precision of a few eV by measuring the tritium beta decay energy distribution near the endpoint. Key features of the experiment are a 2 eV resolution electrostatic spectrometer and a high-activity frozen tritium source.
Date: March 1, 1986
Creator: Fackler, O.; Mugge, M.; Sticker, H.; White, R.M. & Woerner, R.
Partner: UNT Libraries Government Documents Department

A test of Newton's Law of Gravity using the BREN Tower, Nevada

Description: We predicted gravity values on a tower by upward continuing an extensive set of surface data in order to test the 1/r/sup 2/ dependence of Newton's Law of Universal Gravitation. We measured gravity at 12 heights up to 454 m on a tower at the Nevada Test Site, and at 91 locations on the surface of the earth within 2.5 kilometers of the tower. These data have been combined with 60,000 surface gravity measurements within 300 kilometers of the tower and have been used to predict the gravitational field on the tower via a solution of Laplace's equation. A discrepancy between the observed gravity values and the prediction could suggest a breakdown of Newtonian Gravity, but we observe none. Our preliminary results are consistent with the Newtonian hypothesis to within 93 +- 95 ..mu..gals at the top of the tower, a result which conflicts with the previously reported 500 ..mu..gal non-Newtonian signal seen at 562 meters above the earth. 24 refs., 2 figs.
Date: May 22, 1989
Creator: Kasameyer, P.; Thomas, J.; Fackler, O.; Mugge, M.; Kammeraad, J.; Millett, M. et al.
Partner: UNT Libraries Government Documents Department

An experiment to measure the electron neutrino mass using a cryogenic tritium source

Description: An experiment has been performed to determine the electron neutrino mass with the precision of a few eV by measuring the tritium beta decay energy distribution near the endpoint. Key features of the experiment are a 2 eV resolution electrostatic spectrometer and a high-activity frozen tritium source. It is important that the source have electronic wavefunctions which can be accurately calculated. These calculations have been made for tritium and the HeT/sup +/ daughter ion and allow determination of branching fractions to 0.1% and energy of the excited states to 0.1 eV. The excited final molecular state calculations and the experimental apparatus are discussed. 4 refs., 5 figs.
Date: June 25, 1985
Creator: Fackler, O.; Jeziorski, B.; Kolos, W.; Monkhorst, H.; Mugge, M.; Sticker, H. et al.
Partner: UNT Libraries Government Documents Department

Multi-Layer Perceptrons and Support Vector Machines for Detection Problems with Low False Alarm Requirements: an Eight-Month Progress Report

Description: In this project, the basic problem is to automatically separate test samples into one of two categories: clean or corrupt. This type of classification problem is known as a two-class classification problem or detection problem. In what follows, we refer to clean examples as negative examples and corrupt examples as positive examples. In a detection problem, a classifier decision on any one sample can be grouped into one of four decision categories: true negative, true positive, false negative and false positive. These four categories are illustrated by Table 1. True negatives and true positives are cases where the classifier has made the correct decision. False positives are cases where the classifier decides positive when the true nature of the sample was negative, and false negatives are cases where the classifier decides negative when the sample was actually positive. To evaluate the performance of a classifier, we run the classifier on all the samples of a data set and then count all the instances of true negatives, true positives, false negatives, and false positives. All of the performance metrics in this report are then formed from a combination of these four basic decision categories.
Date: January 9, 2007
Creator: Chen, B; Hickling, T; Krnjajic, M; Hanley, W; Clark, G; Nitao, J et al.
Partner: UNT Libraries Government Documents Department

CROSS SECTION MEASUREMENTS FOR CHARM PRODUCTION BY MUONS AND PHOTONS

Description: Interactions of 209-GeV muons in the Multimuon Spectrometer at Fermilab have yielded 20072 dimuon final states, with (81±10)% attributed to production of charmed states decaying to muons. The cross section for diffractive charm muoproduction is 6.9{sub -1.4}{sup +1.9} nb. Extrapolated to Q{sup 2} =0, the effective cross section for 178(100)-GeV photons is 750{sup +180}{sub -130} (560{sup +200}{sub -130}) nb, too small to explain the high-energy rise in the photon-nucleon total cross section.
Date: April 1, 1980
Creator: Clark, A.R.; Johnson, K.J.; Kerth, L.T.; Loken, S.C.; Markiewicz, T.W.; Meyers, P.D. et al.
Partner: UNT Libraries Government Documents Department

POLARIZATION OF MUOPRODUCED J/{psi} (3100)

Description: We have analyzed the polarization and Q{sup 2}-dependence of muoproduced {psi}{yields}{mu}{sup +}{mu}{sup -} in a magnetized-steel calorimeter at Fermilab. The reaction {gamma}{sub V}N{yields}{psi}N is found to be helicity-conserving. Even allowing for possible Q{sup 2}-dependence of the decay angular distribution, the {psi} muoproduction cross section falls more steeply in Q{sup 2} than predicted by {psi} dominance.
Date: October 1, 1980
Creator: Clark, A. R.; Johnson, K. J.; Kerth, L. T.; Loken, S. C.; Markiewicz, T. W.; Meyers, P. D. et al.
Partner: UNT Libraries Government Documents Department

LOWER LIMIT ON NEUTRAL HEAVY MUON MASS

Description: Analysis of 122 965 dimuon final states produced by 209-GeV muons in a magnetized iron calorimeter has set a lower limit on the mass of a neutral heavy muon ({bar M}{sup 0}). If the {bar M}{sup 0} is coupled with Fermi strength to a right-handed charged current and decays to {mu}{mu}{nu} with a 10% branching ratio, its mass exceeds 9 GeV/c{sup 2}.
Date: November 1, 1980
Creator: Clark, A. R.; Johnson, K. J.; Kerth, L. T.; Loken, S. C.; Markiewicz, T. W.; Meyers, P. D. et al.
Partner: UNT Libraries Government Documents Department

LIMIT ON BOTTOM-HADRON PRODUCTION BY 209-GeV MUONS

Description: Analysis of 36 952 dimuon final states produced by 209-GeV muons in a magnetized-iron calorimeter has been used to set the 90%-confidence level limit {sigma}({mu}N{yields}b{bar b}X)B(b{bar b}{yields}{mu}X)<2.9x10{sup -36} cm{sup 2} for the production of bottom hadrons. Using B=0.17, the bound on the cross section for 160-GeV photons extrapolated to Q{sup 2}=0 is {sigma}({gamma}N{yields}b{bar b}X)<4.3 nb, These limits conflict with several model calculations based on vector-meson dominance.
Date: December 1, 1980
Creator: Clark, A. R.; Johnson, K. J.; Kerth, L. T.; Loken, S. C.; Markiewicz, T. W.; Meyers, P. D. et al.
Partner: UNT Libraries Government Documents Department

LIMIT ON {Upsilon} MUOPRODUCTION AT 209 GeV

Description: We present the dimuon mass spectrum from 102 678 three-muon final states produced by muon interactions within a magnetized steel calorimeter. The data place a 90%-confidence limit on the production of {Upsilon} states by muons: {sigma}({mu}N{yields}{mu}{Upsilon}X)B({Upsilon}{yields}{mu}{sup +}{mu}{sup -})<22x10{sup -39} cm{sup 2}, consistent with a photon-gluon-fusion model calculation.
Date: June 1, 1980
Creator: Clark, A.R.; Johnson, K.J.; Kerth, L.T.; Loken, S.C.; Markiewicz, T.W.; Meyers, P.D. et al.
Partner: UNT Libraries Government Documents Department

Fabrication of DDS-3, an 11.4 GHz damped-detuned structure

Description: A 1.8 m X-band Damped-Detuned Structure (DDS-3) has been fabricated and characterized as part of the structure development program towards a TeV-scale e + e - linear collider. In this joint venture, the copper cells were precision-fabricated by LLNL, diffusion-bonded into a monolithic structure by KEK, and the structure completed and tested by SLAC. The overall process constitutes a baseline for future high-volume structure manufacture.
Date: March 1, 1999
Creator: Adolphsen, C; Asano, K; Elmer, J; Funchasi, Y; Higashi, Y; Higo, T et al.
Partner: UNT Libraries Government Documents Department