Date of Award

2015

Document Type

Open Access Dissertation

Department

Physics and Astronomy

First Advisor

Roberto Petti

Abstract

Coherent meson production measurement is very important in physics research. First, the coherent pion production is a potential background to v oscillation in next generation of Long Base Line Experiment(ELBNF/DUNE); second, coherent pion and coherent p production provide a detailed test of CVC and PCAC hypothesis; third, coherent meson production can be used to monitor the neutrino and anti-neutrino fluxes in the experiment. This dissertation focuses on two parts: coherent pi production in NOMAD, and coherent p simulation using LBNF fluxes. With the NOMAD data, the ratio between cross-sections of coherent pi- and v charged current interactions was measured and compared with the measurements of coherent pi+. The experience of coherent pi analysis may be used to evaluate the sensitivity of ELBNF/DUNE project to coherent processes. With the ELBNF process, I wrote a new C++ simulation package and generated 100k coherent p+ events. It is known that for the neutrino-induced process, the incoming neutrino fluxes could not be measured directly, and the Q2 and other variables related to it are unknown in the neutrino-induced neutral current interactions. The photon-induced coherent p0 provides a way to get additional information to constrain the incoming neutrino fluxes. I calculated the ratios between the cross-sections of neutrino-induced coherent p+-, p0 and photon-induced coherent p0. With these ratios, some kinematic variable distributions are reweighted with this ratio in this thesis.

Rights

© 2015, Libo Jiang

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