Dimuon Production by High Energy Neutrinos and Antineutrinos in the Fermilab 15-foot Bubble Chamber PDF Download
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Author: John L. Orthel
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Languages : en
Pages : 302
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Author: John L. Orthel
Publisher:
ISBN:
Category :
Languages : en
Pages : 302
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Book Description
![Dimuon Production by High Energy Neutrinos and Antineutrinos in the Fermilab Fifteen-foot Bubble Chamber. [60 and 89 GeV]. PDF](https://books.google.com/books/content/images/frontcover/XnNrAQAACAAJ?fife=w80-h100)
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Languages : en
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The Fermilab fifteen-foot bubble chamber/two-plane External Muon Identifier (EMI) hybrid detector filled with Ne(47% atomic)-H2 is exposed to the quadrupole triplet beam ( = 89 GeV, = 60 GeV). In 326,000 pictures there are 10,148 neutrino and 1773 antineutrino charged current events with two-plane EMI muon identification and muon momenta> 4 GeV/c. In this sample there are 55 .mu.−.mu. X, 11 .mu.−.mu.−X and 0 .mu.mu.+X candidates with muon momenta> 4 GeV/c. The like-sign events are consistent with background. The opposite-sign dimuons occur at R/sub .mu. .mu./ = 0.35 +- 0.10% of the single muon rate. The .nu./sub .mu./-induced .mu.−.mu./sup +/ rate is 0.20 +- 0.15% below E/sub nu//sub .mu./ = 100 GeV and 0.50 +- 0.30% above 100 GeV. In the opposite-sign dimuons there are 10 candidates with an associated V° implying 0.76 +- 0.36 neutral strange particle per opposite-sign dimuon event. The production rate, excess of neutral strange particles, and kinematic distributions of the dimuon events are consistent with the charm model predictions. 56 references.
Author: John L. Orthel
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Category :
Languages : en
Pages : 134
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Languages : en
Pages :
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Author: Vivek Jain
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Category : Muons
Languages : en
Pages : 486
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Category :
Languages : en
Pages : 42
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The authors propose to examine in detail, using the 15-foot bubble chamber and an improved (Phase II) EMI, the characteristics of 'dimuon' events produced by neutrinos. A light neon-hydrogen filling (30% neon atoms) provides adequate target mass, good track measurements, and high detection efficiency for photons and electrons. Thus e-[mu] and e-e dileptons, as well as dimuons, can be observed with good efficiency. They estimate a yield of 100 detected dimuons in a 200 K picture expoture. They assume 400 GeV operation, 1 x 1013 protons/pulse, and a two-horn dichromatic beam focusing 100 ± 10 GeV/c mesons. If dimuons are made by neutrinos ≥ 30 GeV, then the yield from this dichromatic beam is about half the yield from a wide-band beam. Knowledge of neutrino energy is important in dimuon analysis. An improved two-plane EMI, as proposed by the UH-LBL group, would provide about 1 kg/cm2 absorption thickness for particles above 10 GeV/c, thus ensuring excellent dimuon identification. Another proposed EMI improvement, the Internal Picket Fence (IPF), is designed to eliminate EMI random background (mainly neutrino-induced in the internal coil-absorber). this should greatly simplify EMI analysis and reduce the misidentification of low momentum hadrons as muons. Thus they also expect improved efficiency for identification of neutral current events and slow (wide-angle) muons with this Phase II EMI.
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Category : Particle accelerators
Languages : en
Pages : 166
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Author: David Roberts Winn
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Category : Antineutrinos
Languages : en
Pages : 620
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Category :
Languages : en
Pages : 80
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Category : Power resources
Languages : en
Pages : 852
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