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Title: Measurement of the neutrino-proton neutral current elastic cross section using the ND280 detector
Author: Knight, Aaron D.
ISNI:       0000 0004 8505 0815
Awarding Body: University of Warwick
Current Institution: University of Warwick
Date of Award: 2018
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The T2K experiment, based in Japan, is a long baseline neutrino oscillation experiment. It is the charged current quasi-elastic (CCQE) interaction that is the dominant process in the T2K beam line and the collaboration, along with other experiments, have exerted a lot of effort into better understanding the CCQE channel. The neutral current elastic (NCE) channel on the other hand has not been studied by T2K. Measurements of neutrino cross sections from a number of different experiments that make use of various target materials have shown that our understanding of neutrino interactions is incomplete. There exists tension between data sets for experiments with lighter nuclei as target, such as hydrogen, and those that use heavier nuclei such as carbon. This has led to the existence of the axial mass problem. In order to better understand this, new models known as 2p-2h models have been developed. However, it is unclear which, if any, of these models correctly describe neutrino interactions. A correct model describing neutrino interactions should be able to successfully model both charged current and neutral current interactions simultaneously. The NCE interaction provides a complimentary measurement to the CCQE channel. Comparing the NCE and the CCQE processes may lead to degeneracy between models being broken and allow for a better understanding of neutrino interactions. Using ND280's fine-grained detector (FGD) as target, a measurement of the NCE cross section is presented. As ND280 is primarily sensitive to interactions on protons, the NCE interaction is studied by observing the protons that are the product of such a process. The total NCE cross section is reported in this thesis to be (2:72 ±_ 0:41) x 10-40cm2 nucleon-1.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: QC Physics