\begin{thebibliography}{44}
\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][]{\href{http://www.citebase.org/abstract?id=oai:ar%
Xiv.org:#2}{#2}}

\bibitem[{\citenamefont{Adloff \emph{et~al.}}(2001{\natexlab{a}})}]{h1alphas}
\bibinfo{author}{\bibfnamefont{C.}~\bibnamefont{Adloff}}
  \bibnamefont{\emph{et~al.}} [\bibinfo{collaboration}{H1 Collaboration}],
  \bibinfo{journal}{Eur. Phys. J.} \textbf{\bibinfo{volume}{C21}},
  \bibinfo{pages}{33} (\bibinfo{year}{2001}{\natexlab{a}}),
  \eprint{[hep-ex/0012053]}.

\bibitem[{\citenamefont{Aaron \emph{et~al.}}(2009)}]{h1lowq2}
\bibinfo{author}{\bibfnamefont{F.~D.} \bibnamefont{Aaron}}
  \bibnamefont{\emph{et~al.}} [\bibinfo{collaboration}{H1 Collaboration}]
  (\bibinfo{year}{2009}), \bibinfo{note}{submitted to Eur. Phys. J.},
  \eprint{[arXiv:0904.0929]}.

\bibitem[{\citenamefont{Chekanov \emph{et~al.}}(2001)}]{Chekanov:2001qu}
\bibinfo{author}{\bibfnamefont{S.}~\bibnamefont{Chekanov}}
  \bibnamefont{\emph{et~al.}} [\bibinfo{collaboration}{ZEUS Collaboration}],
  \bibinfo{journal}{Eur. Phys. J.} \textbf{\bibinfo{volume}{C21}},
  \bibinfo{pages}{443} (\bibinfo{year}{2001}), \eprint{[hep-ex/0105090]}.

\bibitem[{\citenamefont{Chekanov \emph{et~al.}}(2009)}]{Chekanov:2009na}
\bibinfo{author}{\bibfnamefont{S.}~\bibnamefont{Chekanov}}
  \bibnamefont{\emph{et~al.}} [\bibinfo{collaboration}{ZEUS Collaboration}]
  (\bibinfo{year}{2009}), \bibinfo{note}{submitted to Phys. Lett. B},
  \eprint{[arXiv:0904.1092]}.

\bibitem[{\citenamefont{Aaron \emph{et~al.}}(2008)}]{h1fl}
\bibinfo{author}{\bibfnamefont{F.~D.} \bibnamefont{Aaron}}
  \bibnamefont{\emph{et~al.}} [\bibinfo{collaboration}{H1 Collaboration}],
  \bibinfo{journal}{Phys. Lett.} \textbf{\bibinfo{volume}{B665}},
  \bibinfo{pages}{139} (\bibinfo{year}{2008}), \eprint{[hep-ex/0805.2809]}.

\bibitem[{\citenamefont{Adloff
  \emph{et~al.}}(2001{\natexlab{b}})}]{Adloff:2001rw}
\bibinfo{author}{\bibfnamefont{C.}~\bibnamefont{Adloff}}
  \bibnamefont{\emph{et~al.}} [\bibinfo{collaboration}{H1 Collaboration}],
  \bibinfo{journal}{Phys. Lett.} \textbf{\bibinfo{volume}{B520}},
  \bibinfo{pages}{183} (\bibinfo{year}{2001}{\natexlab{b}}),
  \eprint{[hep-ex/0108035]}.

\bibitem[{\citenamefont{Adloff \emph{et~al.}}(2000)}]{Adloff:1999ah}
\bibinfo{author}{\bibfnamefont{C.}~\bibnamefont{Adloff}}
  \bibnamefont{\emph{et~al.}} [\bibinfo{collaboration}{H1 Collaboration}],
  \bibinfo{journal}{Eur. Phys. J.} \textbf{\bibinfo{volume}{C13}},
  \bibinfo{pages}{609} (\bibinfo{year}{2000}), \eprint{[hep-ex/9908059]}.

\bibitem[{\citenamefont{Adloff
  \emph{et~al.}}(2001{\natexlab{c}})}]{Adloff:2000qj}
\bibinfo{author}{\bibfnamefont{C.}~\bibnamefont{Adloff}}
  \bibnamefont{\emph{et~al.}} [\bibinfo{collaboration}{H1 Collaboration}],
  \bibinfo{journal}{Eur. Phys. J.} \textbf{\bibinfo{volume}{C19}},
  \bibinfo{pages}{269} (\bibinfo{year}{2001}{\natexlab{c}}),
  \eprint{[hep-ex/0012052]}.

\bibitem[{\citenamefont{Adloff \emph{et~al.}}(2003)}]{Adloff:2003uh}
\bibinfo{author}{\bibfnamefont{C.}~\bibnamefont{Adloff}}
  \bibnamefont{\emph{et~al.}} [\bibinfo{collaboration}{H1 Collaboration}],
  \bibinfo{journal}{Eur. Phys. J.} \textbf{\bibinfo{volume}{C30}},
  \bibinfo{pages}{1} (\bibinfo{year}{2003}), \eprint{[hep-ex/0304003]}.

\bibitem[{\citenamefont{Kretzschmar}(2008)}]{kretzschmarth}
\bibinfo{author}{\bibfnamefont{J.}~\bibnamefont{Kretzschmar}}, Doctoral thesis,
  \bibinfo{school}{\protect{Humboldt-Universit\"at zu Berlin}}
  (\bibinfo{year}{2008}),
  \bibinfo{note}{{http://edoc.hu-berlin.de/dissertationen/kretzschmar-jan-2008%
-02-04}}.

\bibitem[{\citenamefont{Abt \emph{et~al.}}(1997{\natexlab{a}})}]{h1det}
\bibinfo{author}{\bibfnamefont{I.}~\bibnamefont{Abt}}
  \bibnamefont{\emph{et~al.}} [\bibinfo{collaboration}{H1 Collaboration}],
  \bibinfo{journal}{Nucl. Instrum. Meth.} \textbf{\bibinfo{volume}{A386}},
  \bibinfo{pages}{310} (\bibinfo{year}{1997}{\natexlab{a}}).

\bibitem[{\citenamefont{Abt \emph{et~al.}}(1997{\natexlab{b}})}]{h1det2}
\bibinfo{author}{\bibfnamefont{I.}~\bibnamefont{Abt}}
  \bibnamefont{\emph{et~al.}} [\bibinfo{collaboration}{H1 Collaboration}],
  \bibinfo{journal}{Nucl. Instrum. Meth.} \textbf{\bibinfo{volume}{A386}},
  \bibinfo{pages}{348} (\bibinfo{year}{1997}{\natexlab{b}}).

\bibitem[{\citenamefont{Appuhn \emph{et~al.}}(1997)}]{spacalc}
\bibinfo{author}{\bibfnamefont{R.~D.} \bibnamefont{Appuhn}}
  \bibnamefont{\emph{et~al.}} [\bibinfo{collaboration}{H1 SpaCal Group}],
  \bibinfo{journal}{Nucl. Instrum. Meth.} \textbf{\bibinfo{volume}{A386}},
  \bibinfo{pages}{397} (\bibinfo{year}{1997}).

\bibitem[{\citenamefont{Andrieu
  \emph{et~al.}}(1993{\natexlab{a}})}]{Andrieu:1993kh}
\bibinfo{author}{\bibfnamefont{B.}~\bibnamefont{Andrieu}}
  \bibnamefont{\emph{et~al.}} [\bibinfo{collaboration}{H1 Calorimeter Group}],
  \bibinfo{journal}{Nucl. Instrum. Meth.} \textbf{\bibinfo{volume}{A336}},
  \bibinfo{pages}{460} (\bibinfo{year}{1993}{\natexlab{a}}).

\bibitem[{\citenamefont{M{\"u}ller \emph{et~al.}}(1992)}]{Muller:1992jk}
\bibinfo{author}{\bibfnamefont{K.}~\bibnamefont{M{\"u}ller}}
  \bibnamefont{\emph{et~al.}}, \bibinfo{journal}{Nucl. Instrum. Meth.}
  \textbf{\bibinfo{volume}{A312}}, \bibinfo{pages}{457} (\bibinfo{year}{1992}).

\bibitem[{\citenamefont{Eichenberger
  \emph{et~al.}}(1992)}]{Eichenberger:1992km}
\bibinfo{author}{\bibfnamefont{S.}~\bibnamefont{Eichenberger}}
  \bibnamefont{\emph{et~al.}}, \bibinfo{journal}{Nucl. Instrum. Meth.}
  \textbf{\bibinfo{volume}{A323}}, \bibinfo{pages}{532} (\bibinfo{year}{1992}).

\bibitem[{\citenamefont{Pitzl \emph{et~al.}}(2000)}]{cst}
\bibinfo{author}{\bibfnamefont{D.}~\bibnamefont{Pitzl}}
  \bibnamefont{\emph{et~al.}}, \bibinfo{journal}{Nucl. Instrum. Meth.}
  \textbf{\bibinfo{volume}{A454}}, \bibinfo{pages}{334} (\bibinfo{year}{2000}),
  \eprint{[hep-ex/0002044]}.

\bibitem[{\citenamefont{Eick \emph{et~al.}}(1997)}]{Eick:1996gv}
\bibinfo{author}{\bibfnamefont{W.}~\bibnamefont{Eick}}
  \bibnamefont{\emph{et~al.}}, \bibinfo{journal}{Nucl. Instrum. Meth.}
  \textbf{\bibinfo{volume}{A386}}, \bibinfo{pages}{81} (\bibinfo{year}{1997}).

\bibitem[{\citenamefont{Andrieu
  \emph{et~al.}}(1993{\natexlab{b}})}]{Andrieu:1993tz}
\bibinfo{author}{\bibfnamefont{B.}~\bibnamefont{Andrieu}}
  \bibnamefont{\emph{et~al.}} [\bibinfo{collaboration}{H1 Calorimeter Group}],
  \bibinfo{journal}{Nucl. Instrum. Meth.} \textbf{\bibinfo{volume}{A336}},
  \bibinfo{pages}{499} (\bibinfo{year}{1993}{\natexlab{b}}).

\bibitem[{\citenamefont{Awes \emph{et~al.}}(1992)}]{Awes:1992yp}
\bibinfo{author}{\bibfnamefont{T.~C.} \bibnamefont{Awes}}
  \bibnamefont{\emph{et~al.}}, \bibinfo{journal}{Nucl. Instrum. Meth.}
  \textbf{\bibinfo{volume}{A311}}, \bibinfo{pages}{130} (\bibinfo{year}{1992}).

\bibitem[{\citenamefont{Schuler and Spiesberger}(1991)}]{Schuler:1991yg}
\bibinfo{author}{\bibfnamefont{G.~A.} \bibnamefont{Schuler}} \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{H.}~\bibnamefont{Spiesberger}}, in
  \emph{\bibinfo{booktitle}{{Physics at HERA, vol. 3}}}, edited by
  \bibinfo{editor}{\bibfnamefont{W.}~\bibnamefont{Buchm{\"u}ller}}
  \bibnamefont{and} \bibinfo{editor}{\bibfnamefont{G.}~\bibnamefont{Ingelman}}
  (\bibinfo{year}{1991}), pp. \bibinfo{pages}{1419--1432},
  \bibinfo{note}{{DJANGOH 1.4}}.

\bibitem[{\citenamefont{Engel and Ranft}(1996)}]{Engel:1995yda}
\bibinfo{author}{\bibfnamefont{R.}~\bibnamefont{Engel}} \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{J.}~\bibnamefont{Ranft}},
  \bibinfo{journal}{Phys. Rev.} \textbf{\bibinfo{volume}{D54}},
  \bibinfo{pages}{4244} (\bibinfo{year}{1996}), \bibinfo{note}{{PHOJET 1.0}},
  \eprint{[hep-ph/9509373]}.

\bibitem[{\citenamefont{Courau and Kessler}(1992)}]{Courau:1992ht}
\bibinfo{author}{\bibfnamefont{A.}~\bibnamefont{Courau}} \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{P.}~\bibnamefont{Kessler}},
  \bibinfo{journal}{Phys. Rev.} \textbf{\bibinfo{volume}{D46}},
  \bibinfo{pages}{117} (\bibinfo{year}{1992}), \bibinfo{note}{{COMPTON 2.2}}.

\bibitem[{\citenamefont{Kwiatkowski
  \emph{et~al.}}(1992)\citenamefont{Kwiatkowski, Spiesberger, and
  M\"ohring}}]{heracles}
\bibinfo{author}{\bibfnamefont{A.}~\bibnamefont{Kwiatkowski}},
  \bibinfo{author}{\bibfnamefont{H.}~\bibnamefont{Spiesberger}},
  \bibnamefont{and} \bibinfo{author}{\bibfnamefont{H.-J.}
  \bibnamefont{M\"ohring}}, \bibinfo{journal}{Comp.\ Phys.\ Comm.}
  \textbf{\bibinfo{volume}{69}}, \bibinfo{pages}{155} (\bibinfo{year}{1992}).

\bibitem[{\citenamefont{Arbuzov \emph{et~al.}}(1996)}]{hector}
\bibinfo{author}{\bibfnamefont{A.}~\bibnamefont{Arbuzov}}
  \bibnamefont{\emph{et~al.}}, \bibinfo{journal}{Comp.\ Phys.\ Comm.}
  \textbf{\bibinfo{volume}{94}}, \bibinfo{pages}{128} (\bibinfo{year}{1996}).

\bibitem[{\citenamefont{Brun \emph{et~al.}}(1987)}]{geant}
\bibinfo{author}{\bibfnamefont{R.}~\bibnamefont{Brun}}
  \bibnamefont{\emph{et~al.}}, \emph{\bibinfo{title}{GEANT3 User's Guide}},
  \bibinfo{howpublished}{CERN} (\bibinfo{year}{1987}), \eprint{[CERN-DD/EE
  84-1]}.

\bibitem[{\citenamefont{Glazov}(2005)}]{glazov}
\bibinfo{author}{\bibfnamefont{S.}~\bibnamefont{Glazov}}, in
  \emph{\bibinfo{booktitle}{13th International Workshop on Deep Inelastic
  Scattering; DIS 2005}}, edited by
  \bibinfo{editor}{\bibfnamefont{W.}~\bibnamefont{Smith}} \bibnamefont{and}
  \bibinfo{editor}{\bibfnamefont{S.~R.} \bibnamefont{Dasu}}
  (\bibinfo{publisher}{AIP Conference Proceedings}, \bibinfo{year}{2005}).

\bibitem[{\citenamefont{Abt \emph{et~al.}}(1993)}]{h1firstf2}
\bibinfo{author}{\bibfnamefont{I.}~\bibnamefont{Abt}}
  \bibnamefont{\emph{et~al.}} [\bibinfo{collaboration}{H1 Collaboration}],
  \bibinfo{journal}{Nucl.\ Phys.\ B} \textbf{\bibinfo{volume}{407}},
  \bibinfo{pages}{515} (\bibinfo{year}{1993}).

\bibitem[{\citenamefont{Derrick \emph{et~al.}}(1993)}]{zeusfirstf2}
\bibinfo{author}{\bibfnamefont{M.}~\bibnamefont{Derrick}}
  \bibnamefont{\emph{et~al.}} [\bibinfo{collaboration}{ZEUS Collaboration}],
  \bibinfo{journal}{Phys.\ Lett.\ B} \textbf{\bibinfo{volume}{316}},
  \bibinfo{pages}{412} (\bibinfo{year}{1993}).

\bibitem[{\citenamefont{Gribov and
  Lipatov}(1972{\natexlab{a}})}]{Gribov:1972ri}
\bibinfo{author}{\bibfnamefont{V.~N.} \bibnamefont{Gribov}} \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{L.~N.} \bibnamefont{Lipatov}},
  \bibinfo{journal}{Sov.\ J.\ Nucl.\ Phys.} \textbf{\bibinfo{volume}{15}},
  \bibinfo{pages}{438} (\bibinfo{year}{1972}{\natexlab{a}}).

\bibitem[{\citenamefont{Gribov and
  Lipatov}(1972{\natexlab{b}})}]{Gribov:1972rt}
\bibinfo{author}{\bibfnamefont{V.~N.} \bibnamefont{Gribov}} \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{L.~N.} \bibnamefont{Lipatov}},
  \bibinfo{journal}{Sov.\ J.\ Nucl.\ Phys.} \textbf{\bibinfo{volume}{15}},
  \bibinfo{pages}{675} (\bibinfo{year}{1972}{\natexlab{b}}).

\bibitem[{\citenamefont{Lipatov}(1975)}]{Lipatov:1974qm}
\bibinfo{author}{\bibfnamefont{L.~N.} \bibnamefont{Lipatov}},
  \bibinfo{journal}{Sov. J. Nucl. Phys.} \textbf{\bibinfo{volume}{20}},
  \bibinfo{pages}{94} (\bibinfo{year}{1975}).

\bibitem[{\citenamefont{Dokshitzer}(1977)}]{Dokshitzer:1977sg}
\bibinfo{author}{\bibfnamefont{Y.~L.} \bibnamefont{Dokshitzer}},
  \bibinfo{journal}{Sov.\ Phys.\ JETP} \textbf{\bibinfo{volume}{46}},
  \bibinfo{pages}{641} (\bibinfo{year}{1977}).

\bibitem[{\citenamefont{Altarelli and Parisi}(1977)}]{Altarelli:1977zs}
\bibinfo{author}{\bibfnamefont{G.}~\bibnamefont{Altarelli}} \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{G.}~\bibnamefont{Parisi}},
  \bibinfo{journal}{Nucl.\ Phys.\ B} \textbf{\bibinfo{volume}{126}},
  \bibinfo{pages}{298} (\bibinfo{year}{1977}).

\bibitem[{\citenamefont{Johnson and Tung}(1977)}]{Johnson:1977dy}
\bibinfo{author}{\bibfnamefont{P.~W.} \bibnamefont{Johnson}} \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{W.}~\bibnamefont{Tung}},
  \bibinfo{journal}{Phys. Rev.} \textbf{\bibinfo{volume}{D16}},
  \bibinfo{pages}{2769} (\bibinfo{year}{1977}).

\bibitem[{\citenamefont{Thorne}(2006)}]{Thorne:2006qt}
\bibinfo{author}{\bibfnamefont{R.~S.} \bibnamefont{Thorne}},
  \bibinfo{journal}{Phys. Rev.} \textbf{\bibinfo{volume}{D73}},
  \bibinfo{pages}{054019} (\bibinfo{year}{2006}), \eprint{[hep-ph/0601245]}.

\bibitem[{\citenamefont{Botje}()}]{QCDNUM}
\bibinfo{author}{\bibfnamefont{M.}~\bibnamefont{Botje}}, \bibinfo{note}{{QCDNUM
  version 17$\beta$, available at
  http://www.nikhef.nl/\~{}h24/qcdnum/index.html}}.

\bibitem[{\citenamefont{Thorne}()}]{ThorneCode}
\bibinfo{author}{\bibfnamefont{R.}~\bibnamefont{Thorne}},
  \bibinfo{note}{{Fortran code, private communication}}.

\bibitem[{\citenamefont{Pascaud and Zomer}()}]{Pascaud:1995qs}
\bibinfo{author}{\bibfnamefont{C.}~\bibnamefont{Pascaud}} \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{F.}~\bibnamefont{Zomer}},
  \bibinfo{note}{preprint LAL-95-05}.

\bibitem[{\citenamefont{Pumplin
  \emph{et~al.}}(2002{\natexlab{a}})}]{Pumplin:2002vw}
\bibinfo{author}{\bibfnamefont{J.}~\bibnamefont{Pumplin}}
  \bibnamefont{\emph{et~al.}}, \bibinfo{journal}{JHEP}
  \textbf{\bibinfo{volume}{07}}, \bibinfo{pages}{012}
  (\bibinfo{year}{2002}{\natexlab{a}}), \eprint{[hep-ph/0201195]}.

\bibitem[{\citenamefont{Martin \emph{et~al.}}(2009)\citenamefont{Martin,
  Stirling, Thorne, and Watt}}]{Martin:2009iq}
\bibinfo{author}{\bibfnamefont{A.~D.} \bibnamefont{Martin}},
  \bibinfo{author}{\bibfnamefont{W.~J.} \bibnamefont{Stirling}},
  \bibinfo{author}{\bibfnamefont{R.~S.} \bibnamefont{Thorne}},
  \bibnamefont{and} \bibinfo{author}{\bibfnamefont{G.}~\bibnamefont{Watt}}
  (\bibinfo{year}{2009}), \eprint{[hep-ph/0901.0002]}.

\bibitem[{\citenamefont{Amsler \emph{et~al.}}(2008)}]{PDG-08}
\bibinfo{author}{\bibfnamefont{C.}~\bibnamefont{Amsler}}
  \bibnamefont{\emph{et~al.}} [\bibinfo{collaboration}{Particle Data Group}],
  \bibinfo{journal}{Phys. Lett.} \textbf{\bibinfo{volume}{B667}},
  \bibinfo{pages}{1} (\bibinfo{year}{2008}).

\bibitem[{\citenamefont{Allasia \emph{et~al.}}(1985)}]{Allasia:1985hw}
\bibinfo{author}{\bibfnamefont{D.}~\bibnamefont{Allasia}}
  \bibnamefont{\emph{et~al.}}, \bibinfo{journal}{Z. Phys.}
  \textbf{\bibinfo{volume}{C28}}, \bibinfo{pages}{321} (\bibinfo{year}{1985}).

\bibitem[{\citenamefont{Pumplin
  \emph{et~al.}}(2002{\natexlab{b}})\citenamefont{Pumplin, Stump, and
  Tung}}]{Pumplin:2000vx}
\bibinfo{author}{\bibfnamefont{J.}~\bibnamefont{Pumplin}},
  \bibinfo{author}{\bibfnamefont{D.~R.} \bibnamefont{Stump}}, \bibnamefont{and}
  \bibinfo{author}{\bibfnamefont{W.}~\bibnamefont{Tung}},
  \bibinfo{journal}{Phys. Rev.} \textbf{\bibinfo{volume}{D65}},
  \bibinfo{pages}{014011} (\bibinfo{year}{2002}{\natexlab{b}}),
  \eprint{[hep-ph/0008191]}.

\end{thebibliography}