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Title:Single Neutral Pion Production in Charged Current and Neutral Current Neutrino Interactions
Author(s):Nienaber, Paul Joseph
Department / Program:Physics
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Physics, Elementary Particles and High Energy
Abstract:An experiment run in the $\nu\sb\mu$ line of the Alternating Gradient Synchrotron at the Brookhaven National Laboratory is described, examining production of single $\pi\sp0$ final states in charged-current ($\nu\sb\mu n \to \mu\sp{-}p\pi\sp0$) and neutral-current ($\nu\sb\mu p \to \nu\sb\mu p\pi\sp0$ and $\nu\sb\mu n \to \nu\sb\mu n\pi\sp0$) reactions, observed in a $5{1\over2}$ ton (fiducial volume) detector consisting of aluminum spark chamber modules and plastic scintillation counters. The data sample contains approximately 470,000 beam pulses. The analysis selected for two-shower final states; the $\gamma\gamma$ and $p\gamma\gamma$ mass distributions are shown. The ratio of neutral- to charged-current single $\pi\sp0$ production is examined; and after corrections for efficiency, misidentification, and contamination from higher technology states are made, a value of R$\sp\prime$ = ${\sigma(\nu\sb\mu\ T \to \nu\sb\mu\ T\sp\prime\ \pi\sp0)}\over{2\sigma(\nu\sb\mu\ T \to \mu\sp{-} T\sp{\prime\prime} \pi\sp0)}$ = 0.248 $\pm$ 0.085 (where T is the target nucleus (for this experiment, aluminum) and T$\sp\prime$ and T$\sp{\prime\prime}$ are final target states), is obtained. The value of this ratio can be related to the Weinberg weak-mixing angle $\theta\sb{w}$, yielding a value of sin$\sp2\theta\sb{w}$ = 0.256 $\pm$ 0.156.
Issue Date:1988
Description:102 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1988.
Other Identifier(s):(UMI)AAI8823214
Date Available in IDEALS:2015-05-13
Date Deposited:1988

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