prog saved

thesis/chapters/chap2_mu_e_conv.tex

@@ -1,7 +1,49 @@
-\chapter{Lepton flavour and $\mu-e$ conversion}
+\chapter{Overview}
 \thispagestyle{empty}
 \label{cha:clfv}
 
+\section{Introduction}
+\label{sec:introduction}
+The COMET experiment~\cite{COMET.2007}, proposed at the Japan Proton
+Accelerator Research Complex (J-PARC), is a next-generation-experiment that
+searches for evidence of charged lepton flavour violation (CLFV) with muons.
+The branching ratio of CLFV in the Standard Model, even with massive neutrinos,
+is prohibitively small, at the order of $10^{-54}$. Therefore, any experimental
+observation of CLFV would be a clear signal of new physics beyond the SM.
+
+The COMET (\textbf{CO}herent \textbf{M}uon to \textbf{E}lectron
+\textbf{T}ransition) Collaboration aims to probe the conversion of a muon to
+an electron in a nucleus field at a single event sensitivity of \num{6E-17},
+pushing for a four orders of magnitude improvement from the current limit set
+by the
+SINDRUM-II~\cite{Bertl.etal.2006}. A staging approach is adopted at the COMET
+to achieve an intermediate physics result, as well as to gain operational
+experience. The first stage, COMET Phase I, is scheduled to start data taking
+in 2016 with the goal single event sensitivity of $3\times 10^{-15}$ after
+a three-month running period. 
+
+A cylindrical drift chamber being developed by the Osaka University group
+together with the Kyushu University group and the Chinese groups
+will be a main tracking detector in the COMET Phase I. It is anticipated that 
+the chamber will be heavily occupied by protons emitted after nuclear muon
+capture in the stopping target, and thus an absorber will be installed to
+reduce the proton hit rate to a tolerable level. A study of proton emission
+following nuclear muon capture for optimisation of the proton absorber is
+presented in this thesis.
+
+The thesis is structured as follows: 
+firstly,
+the physics motivation of the COMET experiment, with muon's normal decays and
+CLFV decays, is described in this later part of this chapter.
+Chapter~\ref{cha:comet_overview} gives an overview of the
+COMET experiment: beam lines, detectors and their requirements, and expected
+sensitivities. Details of the study on proton emission are described in
+Chapters~\ref{cha:alcap_phys},~\ref{cha:the_alcap_run_2013},~\ref{cha:data_analysis}:
+physics, method, experimental set up, data analysis. The results and impacts of
+the study on COMET Phase-I design is discussed in
+Chapter~\ref{cha:discussions_on_the_impact_to_the_comet_phase_i}.
+
+
 \section{Lepton flavour}
 \label{sec:lepton_flavour}
 According to the SM, all matter is built from a small set of fundamental