% This program can be redistributed and/or modified under the terms % of the GNU Public License, version 3. % % Seth Brown, Ph.D. % sethbrown@drbunsen.org % % Compiled with XeLaTeX % Dependencies: % Fontin Sans font (http://www.exljbris.com/fontinsans.html) % \documentclass{beamer} \usepackage{pgf} \usepackage{times} \usepackage[T1]{fontenc} %\usepackage[mathscr]{eucal} %\usepackage{mathptmx} %\usepackage{mathrsfs} \usepackage{hyperref} % \usepackage{pgfpagfes} % \setbeameroption{show notes on second screen} %\pgfpagesuselayout{4 on 1}[a4paper,border shrink=5mm,landscape] \usepackage{xcolor} %\usepackage[dvipsnames]{xcolor} %\usepackage{amsfonts} %\usepackage{amsmath} % \usepackage[amssymb]{SIunits} %\usepackage{natbib} %\usepackage{amssymb} \usepackage{hepparticles} \usepackage{hepnicenames} \usepackage{hepunits} \usepackage{tikz} \usepackage[polish]{babel} %\usepackage{lmodern} \usepackage{feynmp} % suppress navigation bar \beamertemplatenavigationsymbolsempty \usepackage[mathscr]{eucal} \usepackage{mathrsfs} \mode<presentation> { \usetheme{bunsen} \setbeamercovered{transparent} \setbeamertemplate{items}[circle] } % set fonts \usepackage{amsfonts} \usepackage{amsmath} \usepackage{verbatim} \usetikzlibrary{arrows} \usetikzlibrary{shapes} %\usepackage{gfsartemisia-euler} %\usepackage[T1]{fontenc} \setbeamerfont{frametitle}{size=\LARGE,series=\bfseries} \tikzstyle{decision} = [diamond, draw, fill=gray!20, text width=4.5em, text badly centered, node distance=3cm, inner sep=0pt] \tikzstyle{block} = [rectangle, draw, fill=blue!10, text width=5em, text centered, rounded corners, minimum height=2em] \tikzstyle{line} = [draw, -latex'] \tikzstyle{cloud} = [draw, ellipse,fill=red!10, node distance=3cm, minimum height=2em] \tikzstyle{every picture}+=[remember picture] \renewcommand{\PKs}{{\HepParticle{K}{S}{}\xspace}} % color definitions \usepackage{color} \definecolor{uipoppy}{RGB}{225, 64, 5} \definecolor{uipaleblue}{RGB}{96,123,139} \definecolor{uiblack}{RGB}{0, 0, 0} % caption styling %\DeclareCaptionFont{uiblack}{\color{uiblack}} %\DeclareCaptionFont{uipoppy}{\color{uipoppy}} %\captionsetup{labelfont={uipoppy},textfont=uiblack} % see the macros.tex file for definitions \include{macros} % title slide definition \title{Search for LFV and LNV decays at LHCb} \author{Marcin Chrz\k{a}szcz} \institute[Institute of Nuclear Physics] { Institute of Nuclear Physics, \newline Polish Academy of Science } \date{$5^{th}$ November 2012} %-------------------------------------------------------------------- % Introduction %-------------------------------------------------------------------- \begin{document} \setbeamertemplate{background} {\includegraphics[width=\paperwidth,height=\paperheight]{frontpage_bg_mine}} \setbeamertemplate{footline}[default] \begin{frame} \vspace{1.1cm} \begin{columns} \column{2.75in} \titlepage \begin{center} \includegraphics[height=1.0cm,keepaspectratio ]{pic/ifj.png} \hspace{1cm} \includegraphics[height=1.0cm]{pic/LHCb_logo.jpg} \end{center} \vspace{10cm} \column{2.0in} \end{columns} \end{frame} %-------------------------------------------------------------------- % OUTLINE %-------------------------------------------------------------------- \section[Outline]{} \begin{frame} \tableofcontents \end{frame} %------------------------------------------------------------------- % Introduction %------------------------------------------------------------------- % % Set the background for the rest of the slides. % Insert infoline \setbeamertemplate{background} {\includegraphics[width=\paperwidth,height=\paperheight]{slide_bg}} \setbeamertemplate{footline}[bunsentheme] %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \setbeamertemplate{background} {\includegraphics[width=\paperwidth,height=\paperheight]{slide_bg}} \setbeamertemplate{footline}[bunsentheme] %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % \section{Lepton Number Violation} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% johan %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \section{Overview} \subsection{Majorana neutrinos} \begin{frame} \frametitle{LHCb in quest for Majorana neutrinos} \vspace{0.5cm} \begin{columns} \begin{column}{.65\textwidth} \begin{footnotesize} \begin{tabular}{lclr} channel & limit & & \\\hline $\mathcal{B}(\PBminus\to\Ppi^{+}\Pelectron\Pelectron) $ & $<2.3\times 10^{-8}$ & @$90\,\%$ CL &\includegraphics[height=.25cm]{babar}\footnote{BaBar,\href{http://link.aps.org/doi/10.1103/PhysRevD.85.071103}{Phys.\ Rev.\ D \textbf{85}, 071103} (2012)\label{babarB}}\\ $\mathcal{B}(\PBminus\to\PK^{+}\Pelectron\Pelectron) $ & $<3.0\times 10^{-8}$ & @$90\,\%$ CL &\includegraphics[height=.25cm]{babar}\footnotesize{$^{\text{\ref{babarB}}}$}\\ $\mathcal{B}(\PBminus\to\PK^{*+}\Pelectron\Pelectron) $ & $<2.8\times 10^{-6}$ & @$90\,\%$ CL & \includegraphics[height=.25cm]{cleo}\footnote{CLEO, \href{http://link.aps.org/doi/10.1103/PhysRevD.65.111102}{Phys.\ Rev.\ D \textbf{65}, 111102} (2002)\label{cleolnv}}\\ $\mathcal{B}(\PBminus\to\Prho^{+}\Pelectron\Pelectron) $ & $<2.6\times 10^{-6}$ & @$90\,\%$ CL & \includegraphics[height=.25cm]{cleo}\footnotesize{$^{\text{\ref{cleolnv}}}$}\\ $\mathcal{B}(\PBminus\to\PD^{+}\Pelectron\Pelectron) $ & $<2.6\times 10^{-6}$ & @$90\,\%$ CL & \includegraphics[height=.25cm]{belle2-logo}\footnote{Belle, \href{http://link.aps.org/doi/10.1103/PhysRevD.84.071106}{Phys.\ Rev.\ D \textbf{84}, 071106(R)}, (2011)\label{bellelnv}}\\ $\mathcal{B}(\PBminus\to\PD^{+}\Pelectron\Pmuon) $ & $<1.8\times 10^{-6}$ & @$90\,\%$ CL & \includegraphics[height=.25cm]{belle2-logo}\footnotesize{$^{\text{\ref{bellelnv}}}$}\\ $\mathcal{B}(\PBminus\to\Ppi^{+}\Pmuon\Pmuon)$ & $<1.3\times 10^{-8}$ & @$95\,\%$ CL & \includegraphics[height=.25cm]{pic/LHCb_logo.jpg}\footnote{LHCb, CERN-PH-EP-2012-006, \href{http://arxiv.org/abs/1201.5600}{\texttt{arXiv:1201.5600}} (2012)\label{xxxxx}} \\ $\mathcal{B}(\PBminus\to\PK^{+}\Pmuon\Pmuon) $ & $<5.4\times 10^{-7}$ & @$95\,\%$ CL &\includegraphics[height=.25cm]{pic/LHCb_logo.jpg}\footnote{LHCb, \href{http://link.aps.org/doi/10.1103/PhysRevLett.108.101601}{Phys.\ Rev.\ Lett.\ 108 101601} (2012)} \\ %$\mathcal{B}(\PBminus\to\PK^{*+}\Pmuon\Pmuon) $ & $<4.4\times 10^{-6}$ & @$90\,\%$ CL & \includegraphics[height=.25cm]{cleo}\footnotesize{$^{\text{\ref{cleolnv}}}$}\\ %$\mathcal{B}(\PBminus\to\Prho^{+}\Pmuon\Pmuon) $ & $<5.0\times 10^{-6}$ & @$90\,\%$ CL & \footnotesize{$^{\text{\ref{cleolnv}}}$}\\ $\mathcal{B}(\PBminus\to\PD^{+}\Pmuon\Pmuon) $ & $<6.9\times 10^{-7}$ & @$95\,\%$ CL & \includegraphics[height=.25cm]{pic/LHCb_logo.jpg}\footnotesize{$^{\text{\ref{xxxxx}}}$}\\ $\mathcal{B}(\PBminus\to\PD^{*+}\Pmuon\Pmuon)$ & $<2.4\times 10^{-6}$ & @$95\,\%$ CL & \includegraphics[height=.25cm]{pic/LHCb_logo.jpg}\footnotesize{$^{\text{\ref{xxxxx}}}$}\\ $\mathcal{B}(\PBminus\to\PDs^{+}\Pmuon\Pmuon)$ & $<5.8\times 10^{-7}$ & @$95\,\%$ CL & \includegraphics[height=.25cm]{pic/LHCb_logo.jpg}\footnotesize{$^{\text{\ref{xxxxx}}}$}\\ $\mathcal{B}(\PBminus\to\PDzero\Ppiminus\Pmuon\Pmuon)$ & $<1.5\times 10^{-6}$ & @$95\,\%$ CL & \includegraphics[height=.25cm]{pic/LHCb_logo.jpg}\footnotesize{$^{\text{\ref{xxxxx}}}$}\\ \hline \end{tabular} %pic/LHCb_logo.jpg \end{footnotesize} \end{column} \end{columns} \textref{M.Chrz\k{a}szcz 2012} \end{frame} \subsection{$\tau$ physics @ LHCb} \begin{frame}\frametitle{$\tau$ physics @ LHCb} {~} %$LNF decays \begin{block}{} \circled{1} LHCb optimised for $\PB$ decays. \\ \begin{itemize} \item Relatively low background. \item Efficient trigger. \item Analysis can be made using hard cuts(the case of previous slide analysis). \end{itemize} \circled{2} $\tau$ decays at LHCb. \begin{itemize} \item Many $\tau$ killed by trigger. \item Smaller cross section for production. \item Need complicated analysis strategy. \end{itemize} \end{block} \textref{M.Chrz\k{a}szcz 2012} \end{frame} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %\section{Lepton Flavour Violation} \section{$\tau$ decays} \begin{frame}\frametitle{Studied $\tau$ decays} \begin{center} %{\Huge{$\tau$ decays}} {~} \begin{block}{} \circled{1} $\Ptauon\to\Pmuon\Pmuon\APmuon$ \\ \circled{2} $\Ptauon\to\APproton\Pmuon\APmuon$ \end{block} \end{center} \textref{M.Chrz\k{a}szcz 2012} \end{frame} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \subsection{$\Ptauon\to\Pmuon\Pmuon\APmuon$} \begin{frame}\frametitle{Curent status} \frametitle{Status of $\Ptauon\to\Pmuon\Pmuon\APmuon$}%$\PBminus\to h^{+}\ell^{-}\ell^{-}$} \only<1>{ \begin{center} \begin{block}{} \circled{1} In SM small $\mathcal{B}( \Ptauon\to\Pmuon\Pmuon\APmuon ) \sim 10^{-50} $, due to neutrino oscillations. \\ \circled{2} NP can enhance $\mathcal{B}$. \\ \circled{3} Nature still hides $\Ptauon\to\Pmuon\Pmuon\APmuon$ from us.\\ \circled{4} Current limits: \begin{columns} \column{2.5in} \begin{center} \begin{tabular}{| l | l |} \hline Experiment & $90\%$ CL limit \\ \hline \hline BaBar & $3.3 \times 10^{-8}$ \\ \hline Belle & $2.1 \times 10^{-8}$ \\ \hline \end{tabular} \end{center} \column{2.5in} \includegraphics[scale=0.5]{pic_ifj/tau3mu_SM.pdf} \end{columns} \circled{5} Can a hadron collider change the picture? \\ \end{block} \end{center} } \textref{M.Chrz\k{a}szcz 2012} \end{frame} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \begin{frame}\frametitle{Analysis approach} \begin{columns} \column{2.5in} $\mathcal{B}$ factories \column{2.5in} LHCb, ($7 TeV$, 2011 data) \end{columns} \begin{columns} \column{2.5in} \begin{block}{} \circled{1} Clean signal: $\APelectron\Pelectron\to\APtauon\Ptauon$ \\ \circled{2} Calculate the thrust axis \\ \circled{3} "Partial tag" the other $\tau$ \\ \circled{4} Small cross section $0.919nb$ \\ \end{block} \column{2.5in} \begin{block}{} \circled{1} Inclusive $\tau$ cross section: \newline $79.5\pm\unit{8.3}{\micro\barn}$. \\ \circled{2} $8 \times 10^{10} \tau$ produced. \\ \circled{3} Dominant contribution: \newline $\PDs\to\Ptau\Pnut$ ($78\%$) \\ \circled{4} No tag possible. \\ \end{block} \end{columns} \textref{M.Chrz\k{a}szcz 2012} \end{frame} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \begin{frame}\frametitle{Where do we get our $\tau$.} \begin{table}[hb] \caption{Relative contributions to $\sigma(pp \rightarrow \tau X)$.\label{tab:reweighting}} %\footnotesize \begin{tabular}{|l|c|c|c|} \hline Decay chain & Gauss no DPC (\%) & Calc (\%) & $w_{MC\rightarrow calc}$\\ \hline \hline $D_{s} \rightarrow \tau$ & 72.3 $\pm$ 0.1 & 77.9 $\pm$ 4.7 & \\ $ \hspace{2mm} D_{s} \rightarrow \tau$ & 62.6 $\pm$ 0.2 & 67.8 $\pm$ 4.8 & 1.08 $\pm$ 0.08\\ $ \hspace{2mm} B_{x} \rightarrow D_{s} \rightarrow \tau$ & 9.56 $\pm$ 0.07 & 10.1 $\pm$ 2.1 & 1.1 $\pm$ 0.2\\ $D^{-} \rightarrow \tau$ & 2.08 $\pm$ 0.03 & 4.6 $\pm$ 4.4 & \\ $ \hspace{2mm} D^{-} \rightarrow \tau$ & 1.90 $\pm$ 0.02 & 4.4 $\pm$ 4.2 & 2.3 $\pm$ 2.2\\ $ \hspace{2mm} B_{x} \rightarrow D^{-} \rightarrow \tau$ & 0.18 $\pm$ 0.01 & 0.3 $\pm$ 0.3 & 1.5 $\pm$ 1.5\\ $B_{x} \rightarrow \tau$ & 25.5 $\pm$ 0.1 & 17.5 $\pm$ 3.3 & 0.7 $\pm$ 0.1\\ \hline \end{tabular} \end{table} %\center \Large Thank you for attention. \textref{M.Chrz\k{a}szcz 2012} \end{frame} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \begin{frame} \frametitle{Strategy} \begin{columns} \begin{column}{.5\textwidth} \begin{itemize} \item Loose cut based selection \item Classification in 3D space: \begin{itemize} \item invariant mass \item decay topology\newline (multivariate) \item particle identification\newline (multivariate) \end{itemize} \item Classifier trained on simulation \item Calibration with control channel \item Normalization with $\PDs \to \phi(\mu \mu) \pi$ \item CLs method to extract the result \end{itemize} \end{column} \begin{column}{.5\textwidth} \begin{block}{Signal \& Calibration \& Background channel} \includegraphics[width=.7\textwidth]{topos} \newline \includegraphics[width=.7\textwidth]{topob2.png} \end{block} \end{column} \end{columns} \textref{M.Chrz\k{a}szcz 2012} \end{frame} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%5 \begin{frame} \frametitle{Signal likelihoods} \begin{columns}\begin{column}{.48\textwidth} \begin{block}{particle identification} \begin{itemize} \item hits in muon chambers \item energy in calorimeters \begin{itemize} \item compatible with MIP \end{itemize} \item RICH response \end{itemize} \end{block} \begin{exampleblock}{Calibration} $\PJpsi\to\APmuon\Pmuon$ \end{exampleblock} \includegraphics[width=.88\textwidth]{./Fig1b_pidbinning3} \end{column} \begin{column}{.48\textwidth} \begin{block}{3 body decay likelihood} \begin{itemize} \item vertex properties \begin{itemize} \item vertex fit, pointing \end{itemize} \item track quality \item isolation \end{itemize} \end{block} \begin{exampleblock}{Calibration} $\PDs\to\Pphi\Ppi$ \end{exampleblock} \includegraphics[width=.88\textwidth]{./Fig1a_geobinning3} \end{column} \end{columns} \textref{M.Chrz\k{a}szcz 2012} \end{frame} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % \underbrace{•} \begin{frame} \frametitle{Normalization channel $\PDs^{+}\to\Pphi(\APmuon\Pmuon)\Ppiplus$} \begin{block}{Produced $\tau$ leptons} \vspace{-.3cm} \begin{align*} \mathcal{B}(\tau\to\mu\mu\mu)=\underbrace{\frac{\sigma(pp\to\PDs\to\Ptau)}{\sigma(pp\to\Ptau)}}_\text{$77.9\%$} \frac{\mathcal{B}(\PDs\to\Pphi(\Pmu\Pmu)\Ppi)}{\mathcal{B}(\PDs\to\Ptau\Pnut)} \frac{\varepsilon_{norm}}{\varepsilon_{sig}}\frac{N_{\tau\to\mu\mu\mu}}{N_{\PDs\to\Pphi(\Pmu\Pmu)\Ppi}} \end{align*} \end{block} \begin{center} \includegraphics[scale=0.3]{pic/LHCb_logo.jpg}\hspace{.5em} \texttt{LHCb-CONF-2012-015} \includegraphics[scale=0.3]{./Fig3a_mDs} \end{center} \textref{M.Chrz\k{a}szcz 2012} \end{frame} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \begin{frame} \frametitle{Invariant mass} \begin{columns} \begin{column}{.8\textwidth} \begin{itemize} \item background estimation in sidebands \item different signal likelihood inside signal region \end{itemize} \end{column} \end{columns} \begin{columns} \begin{column}{.65\textwidth} \includegraphics[width=\textwidth]{./masssim} \end{column} \begin{column}{.35\textwidth} \begin{itemize} \item Mass resolution and mass scale calibrated on data \item \textcolor{yellow}{Blinded window} \item \textcolor{orange}{Mass window} \item Mass resolution: $9.16 MeV$ \end{itemize} \end{column} \end{columns} \textref{M.Chrz\k{a}szcz 2012} \end{frame} \begin{frame} \frametitle{Signal likelihoods} \begin{columns} \begin{column}{.8\textwidth} \begin{block}{combined signal distribution} \begin{itemize} \item events distributed over 25 likelihood bins \item background estimate from mass sidebands \end{itemize} \end{block} Signal efficiency in 3-BODY BDT vs PID BDT plane. \end{column} \begin{column}{.2\textwidth} \end{column} \end{columns} \begin{columns} \begin{column}{.65\textwidth} %\only<1>{\includegraphics[width=\textwidth]{./2d-data2.pdf}} \only{\includegraphics[width=\textwidth]{./2d-data2_both.pdf}} \end{column} \begin{column}{.35\textwidth} \begin{itemize} \item \textcolor{red}{11\,\% signal efficiency} \item \textcolor{blue}{21\,\% signal efficiency} \item for illustration:\newline high likelihood range shown \end{itemize} \end{column} \end{columns} \textref{M.Chrz\k{a}szcz 2012} \end{frame} \begin{frame} \frametitle{Observed events} \begin{columns} \begin{column}{.5\textwidth} %four best bins \includegraphics[width=.98\textwidth]{./Fig4a_1stbin3.pdf} \end{column} \begin{column}{.5\textwidth} %four best bins \includegraphics[width=.98\textwidth]{./Fig4b_2ndbin3.pdf} \end{column} \end{columns} \begin{columns} \begin{column}{.37\textwidth} 11\,\% of the signal 0.03\,\% of the background \end{column} \begin{column}{.13\textwidth} \includegraphics[width=\textwidth]{./2d-data2_1st} \end{column} \begin{column}{.37\textwidth} 21\,\% of the signal 0.14\,\% of the background \end{column} \begin{column}{.13\textwidth} \includegraphics[width=\textwidth]{./2d-data2_2nd} \end{column} \end{columns} %\end{column} %\begin{column}{.5\textwidth} %%next four best bins %\includegraphics[width=.98\textwidth]{./Fig4b_2ndbin.pdf} %\begin{columns} %\begin{column}{.9\textwidth} %21\,\% of the signal % %0.14\,\% of the background %\end{column} %\begin{column}{.1\textwidth} %\includegraphics[width=\textwidth]{./2d-data2_2nd} %\end{column} %\end{columns} %\end{column} %\end{columns} {~} \begin{columns} \begin{column}{.65\textwidth} \begin{description} \item[\textcolor{red}{red dashed}] combinatorial background \item[\textcolor{green}{green}] $\PDs^{+}\to\Peta(\Pmuon\APmuon\Pphoton)\APmuon\Pnum$ \item[\textcolor{blue}{blue}] combined background \end{description} \end{column} \begin{column}{.35\textwidth} \includegraphics[width=.26\textwidth]{pic/LHCb_logo.jpg} \hspace{.5em}$\unit{1}{\reciprocal\femtobarn}$ \texttt{LHCb-CONF-}\texttt{2012-015} \end{column} \end{columns} %no excess observed \textref{M.Chrz\k{a}szcz 2012} \end{frame} \begin{frame} \frametitle{Extracted upper limit} \begin{columns}\begin{column}{.8\textwidth} \vspace{1.0cm} \begin{tabular}{|l|l|l|l|} \hline & \text{observed} & \text{expected} & \text{CL} \\ \hline $\mathcal{B}(\Ptau\to\Pmu\Pmu\Pmu)$ & $6.3\times 10 ^{-8}$ & $8.2\times 10^{-8}$ & $90\%$\\ & $ 7.8\times 10 ^{-8}$ & $9.9\times 10^{-8}$ & $95\%$ \\ \hline \end{tabular} \end{column} \begin{column}{.2\textwidth} \includegraphics[width=.46\textwidth]{pic/LHCb_logo.jpg} \hspace{.5em}$\unit{1}{\reciprocal\femtobarn}$ \texttt{LHCb-CONF-} \texttt{2012-015} \end{column} \end{columns} \begin{columns} \begin{column}{.65\textwidth} \includegraphics[width=\textwidth]{./Fig5_withbkg3.pdf} \end{column} \begin{column}{.04\textwidth} \end{column} \begin{column}{.35\textwidth} \end{column} \end{columns} \textref{M.Chrz\k{a}szcz 2012} \end{frame} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % tau2pmumu \subsection{$\Ptauon\to\APproton\Pmuon\APmuon$} \begin{frame}\frametitle{Curent status} \frametitle{LNV \& BNV in $\Ptauon$ sector}%$\PBminus\to h^{+}\ell^{-}\ell^{-}$} \only<1>{ \Large{$\Ptauon\to\APproton\Pmuon\APmuon$} \newline \Large{$\Ptauon\to\Pproton\Pmuon\Pmuon$} } \only<2>{ \begin{block} \circled{1} Search for baryon number violation processes so far unsuccessful, but must have occurred in the early universe \\ \circled{2} Decay fall into $\vert B -L \vert =0$ category, which is predicted by many NP models.\\ \circled{3} Similar decays $\Ptauon \to \Lambda \Plepton^{-}$, previous studied in $\mathcal{B}$ factories. \\ \circled{4} Two possible decay and new physics modes: $\Ptauon\to\APproton\Pmuon\APmuon$, $\Ptauon\to\Pproton\Pmuon\Pmuon$. \\ \circled{5} Analysis adopted from $\Ptauon\to\Pmuon\Pmuon\APmuon$ \\ \end{block} } \textref{M.Chrz\k{a}szcz 2012} \end{frame} \begin{frame}\frametitle{Curent status} \frametitle{Differences}%$\PBminus\to h^{+}\ell^{-}\ell^{-}$} \begin{columns} \column{2.9in} \begin{center} Mass distribution \newline \includegraphics[scale=0.18]{mass_bins} \end{center} \begin{itemize} \item Use the same $\mathcal{M}_{3body}$ BDT as for $\Ptauon\to\Pmuon\Pmuon\APmuon$ \item Insead of PID BDT use hard PID cut optimised on MC and Data. \item Worse normalization factor, due to hard PID cuts. \item Only combinatorical background expected. \end{itemize} \column{2.2in} \vspace{0.4cm} \begin{scriptsize} 3-body BDT distribution for $\Ptauon\to\APproton\Pmuon\APmuon$ \newline \includegraphics[scale=0.22]{BDTbins_postPID_OS} \newline 3-body BDT distributiion for $\Ptauon\to\Pproton\Pmuon\Pmuon$ \newline \includegraphics[scale=0.22]{BDTbins_postPID_SS} \end{scriptsize} \textref{M.Chrz\k{a}szcz 2012} \end{columns} \end{frame} \begin{frame}\frametitle{Background Fits} \begin{center} \only<1>{ \Large $\Ptauon\to\Pproton\Pmuon\Pmuon$ \newline \begin{columns} \column{2.5in} \includegraphics[scale=0.22]{SS/geo0p4_0p7.png} \small \newline 3-body BDT $(0.4,0.7)$ \column{2.5in} \includegraphics[scale=0.22]{SS/geo0p7_1p1.png} \small \newline 3-body BDT $(0.7,1.0)$ \end{columns} } \only<2>{ \Large $\Ptauon\to\APproton\Pmuon\APmuon$ \newline \begin{columns} \column{2.5in} \includegraphics[scale=0.22]{OS/geo0p4_0p7.png} \small \newline 3-body BDT $(0.4,0.7)$ \column{2.5in} \includegraphics[scale=0.22]{OS/geo0p7_1p1.png} \small \newline 3-body BDT $(0.7,1.0)$ \end{columns} } \end{center} \textref{M.Chrz\k{a}szcz 2012} \end{frame} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \begin{frame}\frametitle{Limits on \textcolor{green}{$\Ptauon\to\APproton\Pmuon\APmuon$} and \textcolor{red}{$\Ptauon\to\Pproton\Pmuon\Pmuon$}} \begin{center} \colorbox{green}{\includegraphics[scale=0.22]{OS_banan_un}} \colorbox{red}{\includegraphics[scale=0.22]{SS_banan_un}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \begin{tabular}{|l|l|l|} \hline CL & \text{Observed} & \text{Expected} \\ \hline \hline $90\%$ & \textcolor{green}{$3.4 \times 10^{-7}$} \textcolor{red}{ $4.6 \times 10^{-7}$} & \textcolor{green}{$4.7 \times 10^{-7}$} \textcolor{red}{ $5.4 \times 10^{-7}$} \\ \hline $95\%$ & \textcolor{green}{$4.5 \times 10^{-7}$} \textcolor{red}{ $6.0 \times 10^{-7}$} & \textcolor{green}{$5.9 \times 10^{-7}$} \textcolor{red}{ $6.9 \times 10^{-7}$} \\ \hline \end{tabular} \end{center} \Large First time measured!! \textref{M.Chrz\k{a}szcz 2012} \end{frame} \begin{frame}\frametitle{Going towards the paper} \begin{Large} Possible improvements(work ongoing): \end{Large} {~} \begin{block}{} \circled{1} Cut background: $D_{s} \to \eta (\mu \mu \gamma) \mu \nu$ in Dalitz space. \\ \begin{columns}\column{2.5in} \center \includegraphics[scale=0.2]{pic/MPL_ds_good_bins.png} \column{2.5in} \center \includegraphics[scale=0.2]{pic/MLP_tau_good_bins.png} \end{columns} \circled{2} Improve binning optimisation using inner sidebands. \\ \circled{3} Use bigger MC samples to reduce the systematics. \\ \end{block} %\center \Large Thank you for attention. \textref{M.Chrz\k{a}szcz 2012} \end{frame} \begin{frame}\frametitle{Summary} {~} \begin{block}{} \circled{1} LNV, LFV and BNV still hidden from us. \\ \circled{2} First upper limits for $\tau$ LFV and LNV in hadron colliders. \\ \circled{3} LHCb catching up $\mathcal{B}$ factories. \\ \circled{4} First search for $\mathcal{B}(\tau \to \Pproton \mu \mu)$ . \\ \circled{5} Paper expected at the end of 2012. \end{block} \begin{center} \center Thank you for your attention. \end{center} \vspace{1.1cm} % \begin{small} Work partially funded by the Polish Ministry of Science and Higher Education under the "Diamond Grant" \end{small} %\center \Large Thank you for attention. \textref{M.Chrz\k{a}szcz 2012} \end{frame} \begin{frame} \center \Huge{Backup Slides} %\center \Large Thank you for attention. \textref{M.Chrz\k{a}szcz 2012} \end{frame} \end{document}