diff --git a/analysis1.tex b/analysis1.tex index c36df41..b9852f5 100644 --- a/analysis1.tex +++ b/analysis1.tex @@ -43,8 +43,8 @@ \subsection{The $\tau_{\rm had}\tau_{\rm had}$, $\tau_{e}\tau_{\rm had}$, $\tau_ For both the collaborations, the observed event yields are compatible with the expected event yield from SM processes, within uncertainties. The $m_{\rm T}(\tau_{1},\tau_{2})$ and $m_{\rm T}^{tot}$ distributions for representative signal regions are are shown in Fig. \ref{fig_1Htautau}. \begin{figure} \centering -\includegraphics[width=0.45\textwidth, angle=0] {figures/fig_1Htautau_a.pdf} -\includegraphics[width=0.45\textwidth, angle=0] {figures/fig_1Htautau_b.pdf} +\includegraphics[width=0.48\textwidth, angle=0] {figures/fig_1Htautau_a.pdf} +\includegraphics[width=0.48\textwidth, angle=0] {figures/fig_1Htautau_b.pdf} \caption{ (Left) Post--fit plot of the total transverse mass distribution in f the $\tau_{\rm had}\tau_{\rm had}$ channel by the ATLAS collaboration. (Right) Post--fit plot of the transverse mass distribution in the no b--tag category of the $\tau_{e}\tau_{\mu}$ channel by the CMS collaboration.} \label{fig_1Htautau} \end{figure} @@ -56,24 +56,24 @@ \subsection{Results} \begin{figure} \centering -\includegraphics[width=0.45\textwidth, angle=0] {figures/fig_2Htautau_a.pdf} -\includegraphics[width=0.45\textwidth, angle=0] {figures/fig_2Htautau_c.pdf} +\includegraphics[width=0.48\textwidth, angle=0] {figures/fig_2Htautau_a.pdf} +\includegraphics[width=0.48\textwidth, angle=0] {figures/fig_2Htautau_c.pdf} \caption{ Observed and expected 95\% CL upper limits on the product of cross section and the branching fraction $\sigma(pp\rightarrow \phi) \times B(\phi\rightarrow \tau\tau)$ obtained by the ATLAS collaboriation (left) and by the CMS collaboriation (right) for the gluon-gluon fusion production.} \label{fig_2aHtautau} \end{figure} \begin{figure} \centering -\includegraphics[width=0.45\textwidth, angle=0] {figures/fig_2Htautau_b.pdf} -\includegraphics[width=0.45\textwidth, angle=0] {figures/fig_2Htautau_d.pdf} +\includegraphics[width=0.48\textwidth, angle=0] {figures/fig_2Htautau_b.pdf} +\includegraphics[width=0.48\textwidth, angle=0] {figures/fig_2Htautau_d.pdf} \caption{ Observed and expected 95\% CL upper limits on the product of cross section and the branching fraction $\sigma(pp\rightarrow \phi) \times B(\phi\rightarrow \tau\tau)$ obtained by the ATLAS collaboriation (left) and by the CMS collaboriation (right) for the b-associted production.} \label{fig_2bHtautau} \end{figure} -\begin{figure} +\begin{figure}[tbh!] \centering -\includegraphics[width=0.45\textwidth, angle=0] {figures/fig_3Htautau_a.pdf} -\includegraphics[width=0.45\textwidth, angle=0] {figures/fig_3Htautau_b.pdf} +\includegraphics[width=0.48\textwidth, angle=0] {figures/fig_3Htautau_a.pdf} +\includegraphics[width=0.48\textwidth, angle=0] {figures/fig_3Htautau_b.pdf} \caption{ The expected and observed 95\% CL upper limits on tan$\beta$ as a function of $m_{A}$ in the MSSM $m_{h}^{mod+}$ scenario for ATLAS (left) and CMS (right).} \label{fig_3Htautau} \end{figure} diff --git a/conclusions.tex b/conclusions.tex index e69de29..9ff2d34 100644 --- a/conclusions.tex +++ b/conclusions.tex @@ -0,0 +1,3 @@ +The discovery of a scalar boson at the LHC +strengthened the interest for searches of extension of the scalar sector of the Standard Model. +A vast variety of searches have been performed by the ATLAS ans CMS collaboriation, using the data collected during the Run 1. Thanks to its proton-proton collisions at a center of mass energy of 13 TeV, the data collected in 2015 allowed the LHC collaborations to extend the reach in sensitivity in the searches for Higgs bosons beyond the SM. Despite the fact that all the searches for additional Higgs bosons performed so far have shown consistency with the SM predictions, the data that will be collected in the next few years can enlight the nature of the Higgs sector. \ No newline at end of file diff --git a/introduction.tex b/introduction.tex index 956ea49..9185454 100644 --- a/introduction.tex +++ b/introduction.tex @@ -1,18 +1,17 @@ -Following the discovery of a scalar particle at the Large Hadron Collider (LHC), an important -question is whether this is the Standard Model (SM) Higgs boson or part of an extended Higgs -sector. One interesting approach to answer this question is to search for additional scalars, -whose observation could confirm existence of an extended Higgs sector. +One of the major achivements by the ATLAS and CMS collaborations during the Run1 data taking at a centre-of-mass energy of 8 TeV at the Large Hadron Collider (LHC) is the discovery of a scalar particle, with a mass of approximately 125 GeV, and properties consistent with the Higgs boson predicted in the Standard Model (SM). + An important question is whether this new particle is the SM Higgs boson or part of an extended Higgs sector. One interesting approach to answer this question is to search for additional scalars. For the first LHC collision data provided at a centre-of-mass energy of 13 TeV and recorded by the ATLAS and CMS detectors, the collaborations have performed many searches that are motivated by a variety of models beyond the SM. The simplest extensions of the SM involve the -addition of an additional singlet or doublet field, known as Electroweak Singlet Models (EWS) +addition of a singlet or the addition of a doublet field, known as Electroweak Singlet Models (EWS) and Two-Higgs-Doublet Models (2HDM), respectively. Many searches are motivated by these extensions and benchmarks within specific related models, such as the Minimal Supersymmetric Standard Model (MSSM). The MSSM in a particular benchmark scenario is completely determined by two parameters, the mass of one of the Higgs bosons and the ratio of the vacuum -expectation values, tan$\beta$. -This proceeding will detail the wide variety of new searches performed with the 13 TeV -data, which are performed with an integrated luminosity of 3.2 fb$^{−1}$ and up to 2.8 fb$^{−1}$ with the -ATLAS and CMS detectors, respectively. Several recent results with the 8 TeV dataset were -also presented, but will not be discussed here. -. +expectation values, tan$\beta$. Models in which both both an additional singlet and doublet field are added in the Higgs sector have been proposed, and benchmarks in the Next to Minimal Supersymmetric +Standard Model (NMSSM) have motivated several additional searches at the LHC. Finally extension with triplets fields has been searched by both the ATLAS and the CMS collaborations. + +In this proceeding will detail on the new searches performed with the 13 TeV +data, which are performed with an integrated luminosity of 3.2 fb$^{−1}$ and up to 2.3 fb$^{−1}$ with the +ATLAS and CMS detectors, respectively. In particular, we will focus on the searches of new scalar bosons in the MSSM benchmarks. Both the wide variety of searches and the precise measurement of the Higgs boson couplings performed with an integrated luminosity of 20 fb$^{−1}$ at $\sqrt{s}=$8 TeV by the ATLAS and the CMS collaborations put stringent limits on the MSSM parameter space. Among the new searches performed with the 13 TeV data, the $A/H\rightarrow\tau\tau$ and the $H\rightarrow hh$ are particularly intriguing and already able to investigate regions of the MSSM parameter space not covered before. +For this reason, this proceeding will focus on these two searches. diff --git a/skeleton.tex b/skeleton.tex index 36b2d15..a73b08c 100644 --- a/skeleton.tex +++ b/skeleton.tex @@ -14,11 +14,10 @@ \author{Paolo Francavilla\thanks{This work is partially supported by the ILP LABEX (under reference ANR-10-LABX-63 and ANR-11-IDEX-0004-02).}\\ - Laboratoire de Physique Nucl´eaire et de Hautes Energies and Institute Lagrange de Paris,\\ + Laboratoire de Physique Nucl\'eaire et de Hautes Energies and Institute Lagrange de Paris,\\ E-mail: \email{paolo.francavilla@cern.ch}} -\abstract{..........................\ - ...........................} +\abstract{The discovery of the a scalar particle at the Large Hadron Collider (LHC) is one of the major achivements by the ATLAS and CMS collaborations. Important questions on the nature of this new boson and on possible extensions of the scalar sector of the Standard Model have been addressed by both the ATLAS and CMS collaborations with a vast variety of searches performed at a centre-of-mass energy of 7 TeV and 8 TeV (LHC Run 1). Thanks to the first LHC collision at a centre-of-mass energy of 13 TeV (LHC Run 2), new searches which go beyond the Run 1 reach, have been performed by the LHC collaborations. Among them we describe the searches for $A/H\rightarrow\tau\tau$ and $H\rightarrow hh$ in this proceeding. } \FullConference{VII Workshop italiano sulla fisica pp a LHC\\ 16-18 Maggio 2016\\ @@ -30,11 +29,11 @@ \section{Introduction} \input{introduction} -\newpage \section{Search for neutral Higgs bosons $H/A \rightarrow \tau\tau$} \input{analysis1} \newpage +\clearpage \section{Search for Higgs boson pair production} \input{analysis2}