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Comment on an unusual event in the E594 detector from the direction of Cygnus X-3

Description: A small array located near the 80 m/sup 2/ E594 neutrino detector at Fermilab had a two week run. The author makes two comments related to ultra high energy gamma ray physics. The first regards the question of angular resolution from muons. In general, the angle of a muon will not reflect the angle of the shower for reasons which include transverse momentum at production, multiple scattering in the atmosphere, multiple scattering in the detector and detector angular resolution. In multiple muon events, the angle between each muon and the average muon angle samples all of these deviations. Therefore, this is a good measure of the angular resolution of the shower using the muons on an event by event basis. The second comment regards an unusual event from Cygnus X-3.
Date: January 1, 1985
Creator: Goodman, M.C.
Partner: UNT Libraries Government Documents Department

Are there atmospheric neutrino oscillations

Description: The neutrino oscillation explanation ([nu][sub [mu]] [yields] [nu][sub [tau]]) of the atmospheric neutrino deficit is often discussed but is far from widely accepted. This paper discusses several experimental observations, and how a consistent picture pointing towards neutrino oscillations might develop.
Date: January 1, 1993
Creator: Goodman, M.C.
Partner: UNT Libraries Government Documents Department

Are there atmospheric neutrino oscillations?

Description: The neutrino oscillation explanation ({nu}{sub {mu}} {yields} {nu}{sub {tau}}) of the atmospheric neutrino deficit is often discussed but is far from widely accepted. This paper discusses several experimental observations, and how a consistent picture pointing towards neutrino oscillations might develop.
Date: June 1, 1993
Creator: Goodman, M. C.
Partner: UNT Libraries Government Documents Department

Atmospheric neutrinos in Soudan 2.

Description: Soudan 2 has measured the atmospheric neutrino flavor ratio with 4.2 fiducial kiloton-years of exposure. It measures a flavor ratio of 0.66 {+-} 0.11(stat), inconsistent with the expected ratio but consistent with the hypothesis of neutrino oscillations and the Super-Kamiokande data. In a sample of events with good angular resolution, fits to the L/E distribution suggest that {Delta}m{sup 2} > 10{sup {minus}3} eV{sup 2}.
Date: March 30, 1999
Creator: Goodman, M. C. & Collaboration, Soudan 2
Partner: UNT Libraries Government Documents Department

Seasonal variations in Soudan 2.

Description: Seasonal Variations in an underground detector may be a signature for Dark Matter. The Soudan 2 detector searches for nucleon decay and atmospheric neutrinos. The trigger rate is about 0.5 Hertz. It is dominated by approximately equal numbers of atmospheric muons and low level radioactivityy. The muon rate has a seasonal variation of {+-}2%, which is consistent with a similar effect at MACRO. The MACRO effect has been correlated with temperature in the upper atmosphere. Our trigger rate has a seasonal variation of {+-}15% which we believe is due to radon in the mine, and variations in air flow with outside temperature.
Date: June 23, 1999
Creator: Goodman, M. C. & Collaboration, Soudan 2
Partner: UNT Libraries Government Documents Department

Atmospheric neutrinos in Soudan 2.

Description: The value and zenith angle dependence of the atmospheric neutrino flavor ratio is interpreted as evidence for neutrino oscillations. The latest values from the Soudan 2 detector are presented. From 4.2 kt-years fiducial exposure, Soudan 2 measures R = 0.66 {+-} 0.11(stat) + 0.05--0.06(syst). Using a subset of the data with the best angular resolution, they plot the L/E distribution and use this to find the allowed region in oscillation parameter space. Their fit suggests that delta m-squared is greater than 10{sup {minus}3} eV{sup 2} at 90% CL.
Date: June 22, 1999
Creator: Goodman, M. C. & Collaboration, The Soudan 2
Partner: UNT Libraries Government Documents Department

Nucleon decay in Soudan 2.

Description: The Soudan 2 detector is used to search for evidence of nucleon decay. Particular emphasis is put on searches for modes with multiple-charged particles in the final state, and for modes suggested by super-symmetric theories.
Date: June 22, 1999
Creator: Goodman, M. C. & Soudan 2 Collaboration,
Partner: UNT Libraries Government Documents Department

A measurement of the hadronic component of air showers in a fine grained calorimeter

Description: The hadronic component of extensive air showers is studied using the E594 fine grained calorimeter and a air shower array trigger. Hadron angle and energy distributions are shown. Events with more than one separated hadron with substantial energy are studied carefully. The correlation of hadronic and muonic components is shown. 2 refs., 3 figs.
Date: January 1, 1987
Creator: Goodman, M.C.; Ellsworth, G.B.; Bofill, J.; Bogert, D.; Freudenreich, H.; Goodman, J.A. et al.
Partner: UNT Libraries Government Documents Department

Angular resolution in underground detectors and a status report of the Soudan II nucleon decay detector

Description: This paper is a status report of the Soudan II honeycomb drift chamber project. It reports on the physics goals, present progress and future schedule of our experiment. It also includes a discussion of the angular resolution of cosmic ray muons which can be achieved in underground detectors, and in particular how to calibrate the resolution using the moon's shadow in cosmic rays. This last point has relevance in trying to understand the angular distributions in the reported observations of underground muons from Cygnus X-3. 12 refs., 9 figs.
Date: January 1, 1987
Creator: Ambats, I.; Ayres, D.; Barrett, W.; Barron, K.; Dawson, J.; Fields, T. et al.
Partner: UNT Libraries Government Documents Department

Azimuthal energy flow in deep inelastic neutrino scattering

Description: Gluon emission and the transverse momentum (p/sub t/) of partons confined in nucleons were studied using deep-inelastic charged-current neutrino-nucleon interactions. For this analysis we use the flow of hadronic energy in the azimuthal direction around the momentum transfer referenced from the neutrino-muon scattering plane. A five standard deviation asymmetry was found. Analysis of this asymmetry indicates a (p/sub t/) of 0.35 +- 0.12 GeV/c if QCD corrections are included, and 0.56 +- 0.05 GeV/c if they are excluded. Some evidence was also observed for x dependence in p/sub t/. Data were taken at Fermilab in 1982 using a 200 ton (fiducial mass) fine grained calorimeter and a dichromatic neutrino beam.
Date: June 12, 1986
Creator: Mukherjee, A.; Bofill, J.; Busza, W.; Eldridge, T.F.; Friedman, J.I.; Fuess, S. et al.
Partner: UNT Libraries Government Documents Department

Observation of atmospheric neutrino oscillations in Soudan 2.

Description: The effects of oscillations of atmospheric {nu}{sub {mu}} are observed in the 5.90 fiducial kiloton-year exposure of the Soudan 2 detector. An unbinned maximum likelihood analysis of the neutrino L/E distribution has been carried out using the Feldman-Cousins prescription. The probability of the no oscillation hypothesis is 5.8 x 10{sup -4}. The 90% confidence allowed region in the sin{sup 2} 2{theta}, {Delta}m{sup 2} plane is presented.
Date: August 15, 2003
Creator: Sanchez, M.; Allison, W. W. M.; Alner, G. J.; Ayres, D. S.; Barrett, W. L.; Goodman, M.C. et al.
Partner: UNT Libraries Government Documents Department

Performance of the Soudan II honeycomb drift chambers

Description: The Soudan II nucleon decay project is in the process of building 260 identical 5-ton fine grained calorimeter modules for the study of nucleon decay and cosmic ray physics in the Soudan Iron Mine in Minnesota. Several of these modules have been studied on a cosmic ray test stand on the surface at Argonne National Lab. Several have been installed on location in the mine, 700 m under the surface (2200 mwe overburden). In addition, many studies of trigger efficiency, pattern recognition and background rejection have been done using Monte Carlo techniques.
Date: January 1, 1987
Creator: Ambats, I.; Ayres, D.; Barrett, W.; Dawson, J.; Fields, T.; Goodman, M.C. et al.
Partner: UNT Libraries Government Documents Department

A measurement of the angular resolution of air showers using the muonic component at ground level

Description: The angular resolution of cosmic ray air showers is found to be 13.4 mr using single tracks and as good as 2 to 4 mr from all of the tracks for selected events by using the muonic component of air showers and a fine grained calorimeter. The sample of events was 8776 events triggered by an air shower array in which 3 to 76 muons were reconstructed. There was very little dependence of the single track angular resolution on either the number of muons or the shower angle.
Date: January 1, 1987
Creator: Goodman, M.C.; Ellsworth, G.B.; Bofill, J.; Bogert, D.; Freudenreich, H.; Goodman, J.A. et al.
Partner: UNT Libraries Government Documents Department

The NOvA Technical Design Report

Description: Technical Design Report (TDR) describes the preliminary design of the NOvA accelerator upgrades, NOvA detectors, detector halls and detector sites. Compared to the March 2006 and November 2006 NOvA Conceptual Design Reports (CDR), critical value engineering studies have been completed and the alternatives still active in the CDR have been narrowed to achieve a preliminary technical design ready for a Critical Decision 2 review. Many aspects of NOvA described this TDR are complete to a level far beyond a preliminary design. In particular, the access road to the NOvA Far Detector site in Minnesota has an advanced technical design at a level appropriate for a Critical Decision 3a review. Several components of the accelerator upgrade and new neutrino detectors also have advanced technical designs appropriate for a Critical Decision 3a review. Chapter 1 is an Executive Summary with a short description of the NOvA project. Chapter 2 describes how the Fermilab NuMI beam will provide a narrow band beam of neutrinos for NOvA. Chapter 3 gives an updated overview of the scientific basis for the NOvA experiment, focusing on the primary goal to extend the search for {nu}{sub {mu}} {yields} {nu}{sub e} oscillations and measure the sin{sup 2}(2{theta}{sub 13}) parameter. This parameter has not been measured in any previous experiment and NOvA would extend the search by about an order of magnitude beyond the current limit. A secondary goal is to measure the dominant mode oscillation parameters, sin{sup 2}(2{theta}{sub 23}) and {Delta}m{sub 32}{sup 2} to a more precise level than previous experiments. Additional physics goals for NOvA are also discussed. Chapter 4 describes the Scientific Design Criteria which the Fermilab accelerator complex, NOvA detectors and NOvA detector sites must satisfy to meet the physics goals discussed in Chapter 3. Chapter 5 is an overview of the NOvA project. The changes ...
Date: October 8, 2007
Creator: Ayres, D. S.; Drake, G. R.; Goodman, M. C.; Grudzinski, J. J.; Guarino, V. J.; Talaga, R. L. et al.
Partner: UNT Libraries Government Documents Department

Construction of the Soudan 2 detector

Description: The authors reported here on the progress in construction of the Soudan 2 nucleon decay detector which is being built at the Soudan iron mine in Minnesota. The authors also report the expected event rate and characteristics of low energy neutrino events, muon events, multiple muon events, and other cosmic ray phenomena which the authors might be sensitive to.
Date: January 1, 1985
Creator: Ayres, D.S.; Barrett, W.L.; Dawson, J.W.; Fields, T.H.; Goodman, M.C.; Hoftiezer, J. et al.
Partner: UNT Libraries Government Documents Department

Observation of the moon shadow in deep underground muon flux.

Description: A shadow of the moon, with a statistical significance of 5{sigma}, has been observed in the underground muon flux at a depth of 2090 mwe using the Soudan 2 detector. The angular resolution of the detector is well described by a Gaussian with {sigma} {le}0.3{degree}. The position of the shadow confirms the alignment of the detector to better than 0.15{degree}. This alignment has remained stable during 10 years of data taking from 1989 through 1998.
Date: June 22, 1999
Creator: Allison, W. W. M.; Alner, G. J.; Ayres, D. S.; Cobb, J. H.; Fields, T. H.; Goodman, M. C. et al.
Partner: UNT Libraries Government Documents Department

Cygnus X-3 revisited: 10 years of muon and radio observations.

Description: The Soudan 2 deep underground tracking calorimeter has recorded cosmic ray muon tracks from the direction of the galactic x-ray binary Cygnus X-3 on most transits during the interval 1989-1998. We analyze these events in the context of previous reports of Cygnus X-3-related muon flux during major radio flares of that source. We find some evidence for excess flux during a small number of transits coincident with major radio flares. We also find an indication that these events maybe distributed around the source with a Gaussian point spread function with {sigma} = 1.3{degree}, larger than the instrumental angular spread of < 0.3{degree}, verified by observation of the shadow of the moon.
Date: June 23, 1999
Creator: Allison, W. W. M.; Alner, G. J.; Ayres, D. S.; Barrett, W. L.; Bode, C.; Fields, T. H. et al.
Partner: UNT Libraries Government Documents Department

Cosmic ray sun shadow in Soudan 2 underground muon flux.

Description: The absorption of cosmic rays by the sun produces a shadow at the earth. The angular offset and broadening of the shadow are determined by the magnitude and structure of the interplanetary magnetic field (IPMF) in the inner solar system. The authors report the first measurement of the solar cosmic ray shadow by detection of deep underground muon flux in observations made during the entire ten-year interval 1989 to 1998. The sun shadow varies significantly during this time, with a 3.3{sigma} shadow observed during the years 1995 to 1998.
Date: June 23, 1999
Creator: Allison, W. W. M.; Alner, G. J.; Ayres, D. S.; Barrett, W. L.; Bode, C.; Fields, T. H. et al.
Partner: UNT Libraries Government Documents Department

High Energy Physics Division semiannual report of research activities, January 1, 2002 - June 30, 2002.

Description: This report describes the research conducted in the High Energy Physics Division of Argonne National Laboratory during the period of January 1 through June 30, 2002. Topics covered here include experimental and theoretical particle physics, advanced accelerator physics, detector development, and experimental facilities research. Lists of Division publications and colloquia are included.
Date: January 31, 2003
Creator: Spinka, H. M.; Nodulman, L. J.; Goodman, M. C.; Repond, J.; Cadman, R.; Ayres, D. S. et al.
Partner: UNT Libraries Government Documents Department

High Energy Physics Division semiannual report of research activities, January 1, 1999--June 30, 1999.

Description: In the period January--June 1999 accomplishments for the ANL-HEP division medium energy physics project consisted of the completion of two papers on past Saclay experiments, the beginning of analysis of recent data from the Crystal Ball measurements at the Brookhaven AGS, and preparations for a RHIC polarimeter. Two papers on Saclay pp elastic scattering data were completed by an ANL physicist, submitted and accepted in Physical Review. Results for the spin observable P - A{sub oono} = A{sub ooon} = A{sub y} at over 30 beam kinetic energies between 800 and 2,800 MeV and C.M. angles from about 70{degree}--110{degree} are described. A total of 919 new data points are presented in these articles. The energy dependence at fixed c.m. angles appears smooth, with no evidence for rapid energy-dependent structure. Work has also begun on two additional papers at Argonne and on others at Saclay.
Date: January 26, 2000
Creator: Spinka, H.; Nodulman, L.; Goodman, M.C.; Repond, J.; Proudfoot, J.; Underwood, D. et al.
Partner: UNT Libraries Government Documents Department

High Energy Physics division semiannual report of research activities, January 1, 1998--June 30, 1998.

Description: This report describes the research conducted in the High Energy Physics Division of Argonne National Laboratory during the period of January 1, 1998 through June 30, 1998. Topics covered here include experimental and theoretical particle physics, advanced accelerator physics, detector development, and experimental facilities research. Lists of Division publications and colloquia are included.
Date: March 9, 1999
Creator: Ayres, D. S.; Berger, E. L.; Blair, R.; Bodwin, G. T.; Drake, G.; Goodman, M. C. et al.
Partner: UNT Libraries Government Documents Department

High Energy Physics division semiannual report of research activities.

Description: This report describes the research conducted in the High Energy Physics Division of Argonne National Laboratory during the period of July 1, 2001 through December 31, 2001. Topics covered here include experimental and theoretical particle physics, advanced accelerator physics, detector development, and experimental facilities research. Lists of Division publications and colloquia are included.
Date: August 29, 2002
Creator: Spinka, H. M.; Nodulman, L. J.; Goodman, M. C.; Repond, J.; Ayres, D. S.; Proudfoot, J. et al.
Partner: UNT Libraries Government Documents Department