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Languages : en
Pages : 5
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This letter reports on a search for [nu]{sub {mu}} → [nu]{sub e} transitions by the MINOS experiment based on a 3.14 x 102° protons-on-target exposure in the Fermilab NuMI beam. We observe 35 events in the Far Detector with a background of 27 ± 5(stat.) ± 2(syst.) events predicted by the measurements in the Near Detector. If interpreted in terms of [nu]{sub {mu}} → [nu]{sub e} oscillations, this 1.5 [sigma] excess of events is consistent with sin2(2[theta]13) comparable to the CHOOZ limit when.
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Languages : en
Pages : 5
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Book Description
This letter reports on a search for [nu]{sub {mu}} → [nu]{sub e} transitions by the MINOS experiment based on a 3.14 x 102° protons-on-target exposure in the Fermilab NuMI beam. We observe 35 events in the Far Detector with a background of 27 ± 5(stat.) ± 2(syst.) events predicted by the measurements in the Near Detector. If interpreted in terms of [nu]{sub {mu}} → [nu]{sub e} oscillations, this 1.5 [sigma] excess of events is consistent with sin2(2[theta]13) comparable to the CHOOZ limit when.
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Languages : en
Pages : 2
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MINOS is a long-baseline neutrino oscillation experiment situated along Fermilab's high-intensity NuMI neutrino beam. MINOS has completed an updated search for muon neutrino to electron neutrino transitions, observation of which would indicate a non-zero value for the neutrino mixing angle [theta]13. The present 7 x 102° protons-on-target data set represents more than double the exposure used in the previous analysis. The new result and its implications are presented.
Author: Juan Pedro Ochoa-Ricoux
Publisher: Springer Science & Business Media
ISBN: 1441979492
Category : Science
Languages : en
Pages : 300
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The centerpiece of the thesis is the search for muon neutrino to electron neutrino oscillations which would indicate a non-zero mixing angle between the first and third neutrino generations (θ13), currently the “holy grail” of neutrino physics. The optimal extraction of the electron neutrino oscillation signal is based on the novel “library event matching” (LEM) method which Ochoa developed and implemented together with colleagues at Caltech and at Cambridge, which improves MINOS’ (Main Injector Neutrino Oscillator Search) reach for establishing an oscillation signal over any other method. LEM will now be the basis for MINOS’ final results, and will likely keep MINOS at the forefront of this field until it completes its data taking in 2011. Ochoa and his colleagues also developed the successful plan to run MINOS with a beam tuned for antineutrinos, to make a sensitive test of CPT symmetry by comparing the inter-generational mass splitting for neutrinos and antineutrinos. Ochoa’s in-depth, creative approach to the solution of a variety of complex experimental problems is an outstanding example for graduate students and longtime practitioners of experimental physics alike. Some of the most exciting results in this field to emerge in the near future may find their foundations in this thesis.
Author: Juan Pedro Ochoa-Ricoux
Publisher: Springer
ISBN: 9781441979483
Category : Science
Languages : en
Pages : 296
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Book Description
The centerpiece of the thesis is the search for muon neutrino to electron neutrino oscillations which would indicate a non-zero mixing angle between the first and third neutrino generations (θ13), currently the “holy grail” of neutrino physics. The optimal extraction of the electron neutrino oscillation signal is based on the novel “library event matching” (LEM) method which Ochoa developed and implemented together with colleagues at Caltech and at Cambridge, which improves MINOS’ (Main Injector Neutrino Oscillator Search) reach for establishing an oscillation signal over any other method. LEM will now be the basis for MINOS’ final results, and will likely keep MINOS at the forefront of this field until it completes its data taking in 2011. Ochoa and his colleagues also developed the successful plan to run MINOS with a beam tuned for antineutrinos, to make a sensitive test of CPT symmetry by comparing the inter-generational mass splitting for neutrinos and antineutrinos. Ochoa’s in-depth, creative approach to the solution of a variety of complex experimental problems is an outstanding example for graduate students and longtime practitioners of experimental physics alike. Some of the most exciting results in this field to emerge in the near future may find their foundations in this thesis.
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Category :
Languages : en
Pages : 5
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This letter reports results from a search for [nu]{sub {mu}}2!nu]{sub {mu}} transitions by the MINOS experiment based on a 7 x 1020 protons-on-target exposure. Our observation of 54 candidate e events in the Far Detector with a background of 49.1 ± 7.0(stat.) ± 2.7(syst.) events predicted by the measurements in the Near Detector requires 2 sin2(2[theta]13) sin2[theta]23
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Category :
Languages : en
Pages : 5
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Book Description
The authors report the results of a search for?{sub e} appearance in?{sub {mu}} beam in the MINOS long-baseline neutrino experiment. With an improved analysis and an increased exposure of 8.2 x 102° protons on the NuMI target at Fermilab, they find that 2 sin2 (?23) sin2 (?13)
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ISBN:
Category :
Languages : en
Pages : 386
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Book Description
We perform a search for v[mu] → ve oscillations, a process which would manifest a nonzero value of the [theta]13 mixing angle, in the MINOS long-baseline neutrino oscillation experiment. The analysis consists of searching for an excess of ve charged-current candidate events over the predicted backgrounds, made mostly of neutral-current events with high electromagnetic content. A novel technique to select electron neutrino events is developed, which achieves an improved separation between the signal and the backgrounds, and which consequently yields a better reach in [theta]13. The backgrounds are predicted in the Far Detector from Near Detector measurements. An excess is observed in the Far Detector data over the predicted backgrounds, which is consistent with the background-only hypothesis at 1.2 standard deviations.
Author: Tingjun Yang
Publisher:
ISBN:
Category :
Languages : en
Pages : 271
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Author: David Works
Publisher:
ISBN:
Category : Physics
Languages : en
Pages : 212
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Author: Ruth Bushnell Toner
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ISBN:
Category :
Languages : en
Pages :
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