Use this URL to cite or link to this record in EThOS: | https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.771506 |
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Title: | The search for low energy single photons in MicroBooNE | ||||||
Author: | Murrells, Robert |
ISNI:
0000 0004 7658 6634
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Awarding Body: | University of Manchester | ||||||
Current Institution: | University of Manchester | ||||||
Date of Award: | 2019 | ||||||
Availability of Full Text: |
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Abstract: | |||||||
The MiniBooNE experiment is a Cherenkov based experiment located on the Booster Neutrino Beam. It observed an unexplained excess of electron neutrino charged current quasi-elastic (CCQE) event candidates in the ~200-475 MeV reconstructed energy region known as the "Low Energy Excess" (LEE). These electron neutrino CCQE event candidates were in the form of lone showers, a signature left by both electrons and photons indistinguishably in the MiniBooNE detector. For this reason the identity of the MiniBooNE LEE as a photon or electron excess is currently unknown. Liquid argon time projection chambers (LArTPCs) are a relatively new type of detector able to distinguish between photons and electrons. The MicroBooNE detector is one such LArTPC and is situated on the same beamline and at a similar baseline as the MiniBooNE detector. This makes MicroBooNE an ideal experiment to test the photon and electron interpretations of the MiniBooNE LEE. This thesis presents the search for a photon LEE using an enhanced rate of neutrino-induced neutral current (NC) Delta production and subsequent radiative decay (NC Delta radiative) as the candidate source. A multi-stage NC Delta radiative event selection has been developed which takes full advantage of MicroBooNE's photon-electron discrimination capability. The ability of the search to select NC Delta radiative events in MicroBooNE and validation of the search with 4.8e19 protons-on-target worth of data are presented. Also shown are preliminary studies of MicroBooNE's sensitivity to a NC Delta radiative interpretation of the LEE.
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Supervisor: | Not available | Sponsor: | Not available | ||||
Qualification Name: | Thesis (Ph.D.) | Qualification Level: | Doctoral | ||||
EThOS ID: | uk.bl.ethos.771506 | DOI: | Not available | ||||
Keywords: | Single Photon ; Neutrino Physics ; MicroBooNE | ||||||
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