ラテックス ポスターで奇妙な問題が発生しています。背景に色を付けたいのですが、ポスターの上部に色が付かない白い帯が常に残ります。
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\title{\titlefont The Bubble Chamber} % Poster title
\author{\authorfont CT} % Author(s)
\date{}
\begin{frame}
% Title section
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\vspace{5cm}
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\maketitle
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\centering
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\begin{tcolorbox}[colback=white,colframe=blue,boxrule=5pt,title=\centering \Huge Production Process ]
The bubble chamber was exposed to a beam of $K^-$ mesons which are slowed by ionising the gas in the chamber, creating bubbles until they are close to stationary at which point the $K^-$ will interact with a neighbouring proton.
This process occurs through the strong interaction wherein the proton and kaon exchange a quark and some gluons:
\end{tcolorbox}
\begin{tcolorbox}[colback=white,colframe=blue,boxrule=5pt,title=\centering \Huge $\Sigma$ Identification]
Visually this is presented in the bubble chamber as a kaon track stopping and two other tracks emerging from it with a $180^{\circ}$ angle between them as shown in Fig 1.
Events where the angle between the tracks $\neq 180^{\circ}$ indicates that the particles are not stationary in the lab frame when the interaction, violating one of the requirements for the use of the mass formula.
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\begin{tcolorbox}[colback=white,colframe=blue,boxrule=5pt,title=\centering \Huge Decay Process ]
The decay of the hyperon then occurs via the weak interaction, a W boson is produced by the Hyperon which pair produces a quark antiquark pair:
However there is the possibility of a semileptonic decay mode, replacing the $q\bar{q}$ pair with a lepton and neutrino:
\begin{align}
\Lambda \to p + e^- + \bar{\nu}_e
\end{align}
Which could be seen in the bubble chamber as an single electron line and proton line emerging instead of a pair of lines corresponding to a proton and pion.
However this process is \textbf{forbidden} by isospin/hypercharge baryon model, thus study of it allows us to test that description of these particles.
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\vspace{1cm}
\begin{tcolorbox}[colback=white,colframe=red,boxrule=5pt,title=\centering \Huge $\Sigma$ Mass Formula ]
The mass of the sigma baryon is calculated through the application of energy and momentum conservation:
\begin{gather}
p_{\pi} = p_{\Sigma} \hspace{1cm} \textrm{Momentum Conservation} \\
m_0 c^2 = \sqrt{m_{\Sigma}^2 c^4 + p_{\Sigma}^2 c^2} + \sqrt{m_{\pi}^2 c^4 + p_{\pi}^2 c^2} \hspace{1cm} \textrm{Energy Conservation}
\end{gather}
When these two are combined a singe formula for the mass of the Sigma baryon is obtained:
\begin{equation}
m_{\Sigma} = \frac{1}{c^2} \left[\left( m_0c^2 - \sqrt{m_{\pi}^2c^4+p_{\pi}^2c^2} \right)^2 - p_{\pi}^2c^2 \right]^{1/2} \hspace{0.7cm} m_0 = m_p + m_K
\end{equation}
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\centering
\Huge Production Process
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Some text here.
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問題が何であるかがわかるスクリーンショットを以下に示します。
すべての下に vspace を配置してコンテンツをページの上部に強制的に配置することなどを試みましたが、白いボックスはそのまま残ります。
どなたか助けていただければ幸いです。この問題を経験した人を見たことがないので、現時点では何をすべきかよくわかりません。
答え1
この問題は、ジオメトリ オプションの設定によって発生しますmargin=2cm。これにより、水平方向の余白だけでなく、上部と下部の余白も設定され、ビーマー独自の上部余白の設定と干渉します。
最も簡単な解決策は、ジオメトリ設定で水平マージンのみを設定し、上部マージンについては Beamer が独自に処理できるようにすることです。
\documentclass{beamer}
\usepackage{geometry}
\geometry{paperwidth=46.8in,paperheight=33.1in,hmargin=2cm}
\setbeamertemplate{navigation symbols}{}
\setbeamertemplate{headline}{}
\setbeamercolor{background canvas}{bg=blue}
\begin{document}
\begin{frame}
test
\end{frame}
\end{document}