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Measurement of neutrino oscillation ...

Detwiler, Jason A.

Measurement of neutrino oscillation with KamLAND.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Measurement of neutrino oscillation with KamLAND.
Author:	Detwiler, Jason A.
Description:	139 p.
Notes:	Adviser: Giorgio Gratta.
Notes:	Source: Dissertation Abstracts International, Volume: 66-01, Section: B, page: 0333.
Contained By:	Dissertation Abstracts International66-01B.
Subject:	Physics, Elementary Particles and High Energy.
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3162394
ISBN:	9780496964581

Measurement of neutrino oscillation with KamLAND.
Detwiler, Jason A.

Measurement of neutrino oscillation with KamLAND. - 139 p.

Adviser: Giorgio Gratta.

Thesis (Ph.D.)--Stanford University, 2005.

A measurement of neutrino oscillation based on a 599 ton-year exposure of the Kamioka Liquid-scintillator Anti-Neutrino Detector (KamLAND) is presented. In the absence of oscillation, we expect 310.0 +/- 23.1 reactor electron-antineutrinos ( n e's) with energies E > 3.4 MeV, and an additional 13.2 +/- 5.9 background events. Only 226 events were detected, corresponding to n e disappearance at the 99.96% CL. Interpreted in terms of two flavor neutrino oscillations n e ↔ n x, the best fit to the KamLAND data gives a mass-squared difference Deltam2 = 0.85+0.95-0.72 x 10-5 eV2 and a mixing angle sin22theta = 0.68+0.20-0.22 . These values are in excellent agreement with the Large Mixing Angle solution to the "solar neutrino problem". The distortion of the measured spectral shape is consistent with neutrino oscillation, and disagrees with the un-oscillated spectral shape at 98.2% significance. Assuming CPT invariance, a combined analysis of solar neutrino results and the KamLAND spectrum yields the precision measurement Deltam 2 = 7.86+0.75-0.59 x 10-5 eV2, tan2 theta = 0.391+0.036-0.034 .

ISBN: 9780496964581Subjects--Topical Terms:

227490
Physics, Elementary Particles and High Energy.

Measurement of neutrino oscillation with KamLAND.
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245 1 0 $a Measurement of neutrino oscillation with KamLAND.
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500 $a Source: Dissertation Abstracts International, Volume: 66-01, Section: B, page: 0333.
502 $a Thesis (Ph.D.)--Stanford University, 2005.
520 # $a A measurement of neutrino oscillation based on a 599 ton-year exposure of the Kamioka Liquid-scintillator Anti-Neutrino Detector (KamLAND) is presented. In the absence of oscillation, we expect 310.0 +/- 23.1 reactor electron-antineutrinos ( n e's) with energies E > 3.4 MeV, and an additional 13.2 +/- 5.9 background events. Only 226 events were detected, corresponding to n e disappearance at the 99.96% CL. Interpreted in terms of two flavor neutrino oscillations n e ↔ n x, the best fit to the KamLAND data gives a mass-squared difference Deltam2 = 0.85+0.95-0.72 x 10-5 eV2 and a mixing angle sin22theta = 0.68+0.20-0.22 . These values are in excellent agreement with the Large Mixing Angle solution to the "solar neutrino problem". The distortion of the measured spectral shape is consistent with neutrino oscillation, and disagrees with the un-oscillated spectral shape at 98.2% significance. Assuming CPT invariance, a combined analysis of solar neutrino results and the KamLAND spectrum yields the precision measurement Deltam 2 = 7.86+0.75-0.59 x 10-5 eV2, tan2 theta = 0.391+0.036-0.034 .
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