\section{References} \label{sec:References} References should be made using Bib\TeX~\cite{BibTeX}. A special style \texttt{LHCb.bst} has been created to achieve a uniform style. Independent of the journal the paper is submitted to, the preprint should be created using this style. Where arXiv numbers exist, these should be added even for published articles. In the PDF file, hyperlinks will be created to both the arXiv and the published version. \begin{enumerate} \item Citations are marked using square brackets, and the corresponding references should be typeset using Bib\TeX\ and the official \lhcb Bib\TeX\ style. An example is in Ref.~\cite{Sjostrand:2006za}. \item For references with four or less authors all of the authors' names are listed~\cite{Majorana:1937vz}, otherwise the first author is given, followed by \etal. The \lhcb Bib\TeX\ style will take care of this. \item The order of references should be sequential when reading the document. This is automatic when using Bib\TeX. \item The titles of papers should in general be included. To remove them, change \texttt{\textbackslash setboolean\{articletitles\}\{false\}} to \texttt{true} at the top of this template. Note that the titles in \verb!LHCb-PAPER.bib! are in plain LaTex, in order to correspond to the actual title on the arXiv record. Some differences in style can thus be noticed with respect to the main text, for example particle names that use capital Greek letters are not slanted in the reference titles ($\Lambda$ vs \Lz) \item Whenever possible, use references from the supplied files \verb!main.bib!, \verb!LHCb-PAPER.bib!, \verb!LHCb-CONF.bib!, and \verb!LHCB-DP.bib!. These are kept up-to-date by the EB. If you see a mistake, do not edit these files, but let the EB know. This way, for every update of the paper, you save yourself the work of updating the references. Instead, you can just copy or check in the latest versions of the \verb!.bib! files from the repository. \item For those references not provided by the EB, the best is to copy the Bib\TeX\ entry directly from \texttt{Inspire}. Often these need to be edited to get the correct title, author names and formatting. For authors with multiple initials, add a space between them (change \texttt{R.G.C.} to \texttt{R. G. C.}), otherwise only the first initial will be taken. Also, make sure to eliminate unnecessary capitalisation. Apart from that, the title should be respected as much as possible (\eg do not change particle names to PDG convention nor introduce/remove factors of $c$). Check that both the arXiv and the journal index are clickable and point to the right article. %\item Even if the basic formatting of the Bib\TeX\ entry is taken from % \texttt{Inspire}, all the data should be cross checked against the % journal. Often there are minor changes to author initials or % titles. In case of a difference between the preprint and the % journal, the bibliographic information from the journal should be % used. \item The \texttt{mciteplus}~\cite{mciteplus} package is used to enable multiple references to show up as a single item in the reference list. As an example \texttt{\textbackslash cite\{Mohapatra:1979ia,*Pascoli:2007qh\}} where the \texttt{*} indicates that the reference should be merged with the previous one. The result of this can be seen in Ref.~\cite{Mohapatra:1979ia,*Pascoli:2007qh}. Be aware that the \texttt{mciteplus} package should be included as the very last item before the \texttt{\textbackslash begin\{document\}} to work correctly. \item It should be avoided to make references to public notes and conference reports in public documents. Exceptions can be discussed on a case-by-case basis with the review committee for the analysis. In internal reports they are of course welcome and can be referenced as seen in Ref.~\cite{LHCb-CONF-2011-003} using the \texttt{lhcbreport} category. For conference reports, omit the author field completely in the Bib\TeX\ record. \item To get the typesetting and hyperlinks correct for \lhcb reports, the category \texttt{lhcbreport} should be used in the Bib\TeX\ file. See Refs.~\cite{LHCb-INT-2011-047, *LHCb-ANA-2011-078, *CERN-THESIS-2014-057, *LHCb-PROC-2014-017, *LHCB-TALK-2014-257} for some examples. It can be used for \lhcb documents in the series \texttt{CONF}, \texttt{PAPER}, \texttt{PROC}, \texttt{THESIS}, \texttt{LHCC}, \texttt{TDR} and internal \lhcb reports. Papers sent for publication, but not published yet, should be referred with their \texttt{arXiv} number, so the \texttt{PAPER} category should only be used in the rare case of a forward reference to a paper. \item Proceedings can be used for references to items such as the \lhcb simulation~\cite{LHCb-PROC-2011-006}, where we do not yet have a published paper. \end{enumerate} There is a set of standard references to be used in \lhcb that are listed in Appendix~\ref{sec:StandardReferences}.