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Antineutrino Oscillations and A Search for Non-standard Interactions with the MINOS Experiment

Isvan, Zeynep (2012) Antineutrino Oscillations and A Search for Non-standard Interactions with the MINOS Experiment. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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MINOS searches for neutrino oscillations using the disappearance of muon neutrinos from the NuMI beam at Fermilab between two detectors. The Near Detector, located near the source, measures the beam composition before flavor change occurs. The energy spectrum is measured again at the Far Detector after neutrinos travel a distance. The mixing angle and mass splitting between the second and third mass states are extracted from the energy dependent difference between the spectra at the two detectors. NuMI is able to produce an antineutrino-enhanced beam as well as a neutrino-enhanced beam. Collecting data in antineutrino-mode allows the direct measurement of antineutrino oscillation parameters. From the analysis of the antineutrino mode data we measure |∆m̅2atm| = 2.62+0.31−0.28 × 10−3eV2 and sin2(2θ̅23) = 0.95+0.10−0.11, which is the most precise measurement of antineutrino oscillation parameters to date.

A difference between neutrino and antineutrino oscillation parameters may indicate new physics involving interactions that are not part of the Standard Model, called non-standard interactions, that alter the apparent disappearance probability. Collecting data in neutrino and antineutrino mode independently allows a direct search for non-standard interactions. In this dissertation non-standard interactions are constrained by a combined analysis of neutrino and antineutrino datasets and no evidence of such interactions is found.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairNaples, Donnadnaples@pitt.eduDNAPLES
Committee MemberWolfenstein,
Committee MemberPaolone,
Committee MemberFreitas, Ayresafreitas@pitt.eduAFREITAS
Committee MemberWood-Vasey, Michaelwmwv@pitt.eduWMWV
Date: 22 June 2012
Date Type: Publication
Defense Date: 6 January 2012
Approval Date: 22 June 2012
Submission Date: 19 January 2012
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 158
Institution: University of Pittsburgh
Schools and Programs: Dietrich School of Arts and Sciences > Physics
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: neutrino oscillation, non-standard interactions
Date Deposited: 22 Jun 2012 14:54
Last Modified: 15 Nov 2016 13:55


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