<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">\begin{thebibliography}{22}
\expandafter\ifx\csname natexlab\endcsname\relax\def\natexlab#1{#1}\fi
\expandafter\ifx\csname bibnamefont\endcsname\relax
  \def\bibnamefont#1{#1}\fi
\expandafter\ifx\csname bibfnamefont\endcsname\relax
  \def\bibfnamefont#1{#1}\fi
\expandafter\ifx\csname citenamefont\endcsname\relax
  \def\citenamefont#1{#1}\fi
\expandafter\ifx\csname url\endcsname\relax
  \def\url#1{\texttt{#1}}\fi
\expandafter\ifx\csname urlprefix\endcsname\relax\def\urlprefix{URL }\fi
\providecommand{\bibinfo}[2]{#2}
\providecommand{\eprint}[2][]{\url{#2}}

\bibitem[{\citenamefont{Wigner}(1939)}]{Wigner:1939cj}
\bibinfo{author}{\bibfnamefont{E.~P.} \bibnamefont{Wigner}},
  \bibinfo{journal}{Annals Math.} \textbf{\bibinfo{volume}{40}},
  \bibinfo{pages}{149} (\bibinfo{year}{1939}).

\bibitem[{\citenamefont{Dirac}(1949)}]{Dirac:1949cp}
\bibinfo{author}{\bibfnamefont{P.~A.~M.} \bibnamefont{Dirac}},
  \bibinfo{journal}{Rev. Mod. Phys.} \textbf{\bibinfo{volume}{21}},
  \bibinfo{pages}{392} (\bibinfo{year}{1949}).

\bibitem[{\citenamefont{Bakamjian and Thomas}(1953)}]{Bakamjian}
\bibinfo{author}{\bibfnamefont{B.}~\bibnamefont{Bakamjian}} \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{L.~H.} \bibnamefont{Thomas}},
  \bibinfo{journal}{Phys. Rev.} \textbf{\bibinfo{volume}{92}},
  \bibinfo{pages}{1300} (\bibinfo{year}{1953}).

\bibitem[{\citenamefont{Keister and Polyzou}(1991)}]{Keister:1991sb}
\bibinfo{author}{\bibfnamefont{B.~D.} \bibnamefont{Keister}} \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{W.~N.} \bibnamefont{Polyzou}},
  \bibinfo{journal}{Adv. Nucl. Phys.} \textbf{\bibinfo{volume}{20}},
  \bibinfo{pages}{225} (\bibinfo{year}{1991}).

\bibitem[{\citenamefont{Melde et~al.}(2008)\citenamefont{Melde, Plessas, and
  Sengl}}]{Melde:2008yr}
\bibinfo{author}{\bibfnamefont{T.}~\bibnamefont{Melde}},
  \bibinfo{author}{\bibfnamefont{W.}~\bibnamefont{Plessas}}, \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{B.}~\bibnamefont{Sengl}},
  \bibinfo{journal}{Phys. Rev.} \textbf{\bibinfo{volume}{D77}},
  \bibinfo{pages}{114002} (\bibinfo{year}{2008}), \eprint{0806.1454}.

\bibitem[{\citenamefont{Krutov and Troitsky}(1999)}]{Krutov:1999zz}
\bibinfo{author}{\bibfnamefont{A.~F.} \bibnamefont{Krutov}} \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{V.~E.} \bibnamefont{Troitsky}},
  \bibinfo{journal}{JHEP} \textbf{\bibinfo{volume}{10}}, \bibinfo{pages}{028}
  (\bibinfo{year}{1999}).

\bibitem[{\citenamefont{Coester and Polyzou}(2005)}]{Coester:2005cv}
\bibinfo{author}{\bibfnamefont{F.}~\bibnamefont{Coester}} \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{W.~N.} \bibnamefont{Polyzou}},
  \bibinfo{journal}{Phys. Rev.} \textbf{\bibinfo{volume}{C71}},
  \bibinfo{pages}{028202} (\bibinfo{year}{2005}).

\bibitem[{\citenamefont{Sengbusch and Polyzou}(2004)}]{Sengbusch:2004sf}
\bibinfo{author}{\bibfnamefont{E.}~\bibnamefont{Sengbusch}} \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{W.~N.} \bibnamefont{Polyzou}},
  \bibinfo{journal}{Phys. Rev.} \textbf{\bibinfo{volume}{C70}},
  \bibinfo{pages}{058201} (\bibinfo{year}{2004}), \eprint{nucl-th/0406042}.

\bibitem[{\citenamefont{Boffi et~al.}(2002)}]{Boffi:2001zb}
\bibinfo{author}{\bibfnamefont{S.}~\bibnamefont{Boffi}} \bibnamefont{et~al.},
  \bibinfo{journal}{Eur. Phys. J.} \textbf{\bibinfo{volume}{A14}},
  \bibinfo{pages}{17} (\bibinfo{year}{2002}), \eprint{hep-ph/0108271}.

\bibitem[{\citenamefont{Lin et~al.}(2008)\citenamefont{Lin, Elster, Polyzou,
  and Glockle}}]{Lin:2007kg}
\bibinfo{author}{\bibfnamefont{T.}~\bibnamefont{Lin}},
  \bibinfo{author}{\bibfnamefont{C.}~\bibnamefont{Elster}},
  \bibinfo{author}{\bibfnamefont{W.~N.} \bibnamefont{Polyzou}},
  \bibnamefont{and} \bibinfo{author}{\bibfnamefont{W.}~\bibnamefont{Glockle}},
  \bibinfo{journal}{Phys. Lett.} \textbf{\bibinfo{volume}{B660}},
  \bibinfo{pages}{345} (\bibinfo{year}{2008}), \eprint{0710.4056}.

\bibitem[{\citenamefont{Witala et~al.}(2005)\citenamefont{Witala, Golak,
  Glockle, and Kamada}}]{Witala:2004pv}
\bibinfo{author}{\bibfnamefont{H.}~\bibnamefont{Witala}},
  \bibinfo{author}{\bibfnamefont{J.}~\bibnamefont{Golak}},
  \bibinfo{author}{\bibfnamefont{W.}~\bibnamefont{Glockle}}, \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{H.}~\bibnamefont{Kamada}},
  \bibinfo{journal}{Phys. Rev.} \textbf{\bibinfo{volume}{C71}},
  \bibinfo{pages}{054001} (\bibinfo{year}{2005}), \eprint{nucl-th/0412063}.

\bibitem[{\citenamefont{Witala et~al.}(2006)\citenamefont{Witala, Golak, and
  Skibinski}}]{Witala:2005nw}
\bibinfo{author}{\bibfnamefont{H.}~\bibnamefont{Witala}},
  \bibinfo{author}{\bibfnamefont{J.}~\bibnamefont{Golak}}, \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{R.}~\bibnamefont{Skibinski}},
  \bibinfo{journal}{Phys. Lett.} \textbf{\bibinfo{volume}{B634}},
  \bibinfo{pages}{374} (\bibinfo{year}{2006}), \eprint{nucl-th/0509098}.

\bibitem[{\citenamefont{Witala et~al.}(2008)}]{Witala:2008va}
\bibinfo{author}{\bibfnamefont{H.}~\bibnamefont{Witala}} \bibnamefont{et~al.},
  \bibinfo{journal}{Phys. Rev.} \textbf{\bibinfo{volume}{C77}},
  \bibinfo{pages}{034004} (\bibinfo{year}{2008}), \eprint{0801.0367}.

\bibitem[{\citenamefont{Witala et~al.}(2011)}]{Witala:2011yq}
\bibinfo{author}{\bibfnamefont{H.}~\bibnamefont{Witala}} \bibnamefont{et~al.},
  \bibinfo{journal}{Phys. Rev.} \textbf{\bibinfo{volume}{C83}},
  \bibinfo{pages}{044001} (\bibinfo{year}{2011}), \eprint{1101.4053}.

\bibitem[{\citenamefont{Huang and Polyzou}(2009)}]{Huang:2008jd}
\bibinfo{author}{\bibfnamefont{Y.}~\bibnamefont{Huang}} \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{W.~N.} \bibnamefont{Polyzou}},
  \bibinfo{journal}{Phys. Rev.} \textbf{\bibinfo{volume}{C80}},
  \bibinfo{pages}{025503} (\bibinfo{year}{2009}), \eprint{0812.2180}.

\bibitem[{\citenamefont{Keister}(1997)}]{Keister:1996ny}
\bibinfo{author}{\bibfnamefont{B.~D.} \bibnamefont{Keister}},
  \bibinfo{journal}{Phys. Rev.} \textbf{\bibinfo{volume}{C55}},
  \bibinfo{pages}{2171} (\bibinfo{year}{1997}), \eprint{nucl-th/9610050}.

\bibitem[{\citenamefont{Keister}(1988)}]{Keister:1988zz}
\bibinfo{author}{\bibfnamefont{B.~D.} \bibnamefont{Keister}},
  \bibinfo{journal}{Phys. Rev.} \textbf{\bibinfo{volume}{C37}},
  \bibinfo{pages}{1765} (\bibinfo{year}{1988}).

\bibitem[{\citenamefont{Fuda and Bulut}(2009)}]{Fuda:2009zz}
\bibinfo{author}{\bibfnamefont{M.~G.} \bibnamefont{Fuda}} \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{F.}~\bibnamefont{Bulut}},
  \bibinfo{journal}{Phys. Rev.} \textbf{\bibinfo{volume}{C80}},
  \bibinfo{pages}{024002} (\bibinfo{year}{2009}).

\bibitem[{\citenamefont{Kamano et~al.}(2009)\citenamefont{Kamano, Julia-Diaz,
  Lee, Matsuyama, and Sato}}]{Kamano:2008gr}
\bibinfo{author}{\bibfnamefont{H.}~\bibnamefont{Kamano}},
  \bibinfo{author}{\bibfnamefont{B.}~\bibnamefont{Julia-Diaz}},
  \bibinfo{author}{\bibfnamefont{T.~S.~H.} \bibnamefont{Lee}},
  \bibinfo{author}{\bibfnamefont{A.}~\bibnamefont{Matsuyama}},
  \bibnamefont{and} \bibinfo{author}{\bibfnamefont{T.}~\bibnamefont{Sato}},
  \bibinfo{journal}{Phys. Rev.} \textbf{\bibinfo{volume}{C79}},
  \bibinfo{pages}{025206} (\bibinfo{year}{2009}), \eprint{0807.2273}.

\bibitem[{\citenamefont{Sokolov}(1977)}]{Sokolov:1977}
\bibinfo{author}{\bibfnamefont{S.~N.} \bibnamefont{Sokolov}},
  \bibinfo{journal}{Dokl. Akad. Nauk SSSR} \textbf{\bibinfo{volume}{223}},
  \bibinfo{pages}{575} (\bibinfo{year}{1977}).

\bibitem[{\citenamefont{Coester and Polyzou}(1982)}]{Coester:1982vt}
\bibinfo{author}{\bibfnamefont{F.}~\bibnamefont{Coester}} \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{W.~N.} \bibnamefont{Polyzou}},
  \bibinfo{journal}{Phys. Rev.} \textbf{\bibinfo{volume}{D26}},
  \bibinfo{pages}{1348} (\bibinfo{year}{1982}).

\bibitem[{\citenamefont{Malfliet and Tjon}(1969)}]{Malfliet:1968tj}
\bibinfo{author}{\bibfnamefont{R.~A.} \bibnamefont{Malfliet}} \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{J.~A.} \bibnamefont{Tjon}},
  \bibinfo{journal}{Nucl. Phys.} \textbf{\bibinfo{volume}{A127}},
  \bibinfo{pages}{161} (\bibinfo{year}{1969}).

\end{thebibliography}
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