A Search for Muon Neutrino to Electron Neutrino Oscillations by Juan Pedro Ochoa-Ricoux

By Juan Pedro Ochoa-Ricoux

A look for Muon Neutrino to Electron Neutrino Oscillations within the MINOS Experiment is a tour de force that summarizes, basically and in a few intensity, a lot of Ochoa’s significant physique of labor which has had an important effect on MINOS. the center-piece of the thesis is the quest for muon neutrino to electron neutrino oscillations, which might point out a non-zero blending attitude among the 1st and 3rd neutrino generations (θ13), at the moment the “holy grail” of neutrino physics. The optimum extraction of the electron neutrino oscillation sign relies at the novel “library occasion matching” (LEM) approach which Ochoa constructed and carried out including colleagues at Caltech and at Cambridge, which improves MINOS’ succeed in for constructing an oscillation sign over the other strategy. LEM will now be the root for MINOS’ outcome, and may most likely continue MINOS on the vanguard of this box till it completes its facts taking in 2011. Ochoa and his colleagues additionally constructed the profitable plan to run MINOS with a beam tuned for antineutrinos, to make a delicate try out of CPT symmetry through evaluating the inter-generational mass splitting for neutrinos and antineutrinos. Ochoa’s in-depth, inventive method of the answer of quite a few complicated experimental difficulties is an exceptional instance for graduate scholars and longtime practitioners of experimental physics alike. the most fascinating leads to this box to emerge within the close to destiny may possibly locate their foundations during this thesis, for which Ochoa used to be offered the nationwide Prize for formative years of Mexico in 2009.

This Doctoral Thesis has been permitted by way of California Institute of expertise, Pasadena, USA.

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Extra resources for A Search for Muon Neutrino to Electron Neutrino Oscillations in the MINOS Experiment

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The signal for 0mbb decay is a monoenergetic peak at the endpoint of the double b-decay spectrum. Through a measurement of the 0mbb-decay rate the neutrino mass can be obtained. 03 eV [66]. What is the right neutrino mass hierarchy? As previously explained, the observation of MSW effects in the sun established that m2 [ m1 . Our knowledge of the atmospheric sector however comes from the observation of atmospheric and beam ml disappearance. As shown in Sect. 1, the survival of ml neutrinos is given to a very good approximation by  2  2 2 Dm32 L Pðma !

9 Feynman diagrams for double beta decay (left) and neutrinoless double beta decay (right). Neutrinoless double beta decay can only occur if neutrinos are Majorana particles mþ;À ¼ 1 ðmL þ mR Þ Æ 2 qffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi! ðmL À mR Þ2 þ 4m2D : ð2:74Þ If mD is approximately the mass of the other fermions, then we have that mþ % m2D =mR and that mÀ % mR . Therefore, through the postulation of a very heavy neutrino field (that can be sterile or coupled through new physics) the large difference in the masses between the neutrinos and the other leptons can be naturally explained.

J. C(27), 331–374 (2003) 75. F. , Double Chooz: a search for the neutrino mixing angle h13 , hep-ex/0606025 (2006) 76. X. , A precision measurement of the neutrino mixing angle h13 using reactor antineutrinos at Daya Bay, hep-ex/0701029 (2007) 77. S. , NOvA proposal to build a 30-kiloton off-axis detector to study neutrino oscillations in the Fermilab NuMI beamline, hep-ex/0503053 (2004) 78. Y. , The JHF-Kamioka neutrino project, hep-ex/0106019 (2001) Chapter 3 The MINOS Experiment Several of the open questions discussed at the end of the last chapter can be addressed in the MINOS experiment.

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