Dr. Thomas Müller

t.muller@cern.ch

Institute of Experimental Nuclear Physics (IEKP)
Karlsruhe Institute of Technology (KIT)

Wolfgang-Gaede-Straße 1
D-76131 Karlsruhe

Campus South, Building 30.23, Office 8-22
+49 (0) 721 608 47243
CERN
European Organisation for Nuclear Research

Route de Meyrin
CH-1211 Genève 23

Building 32, Office 4-B06
+41 (0) 22 76 78267

PhD thesis, Physics, Karlsruhe Institute of Technology (KIT)

  • Topic: Analysis of Standard Model Higgs Boson Decays to Tau Pairs with the CMS Detector at the LHC

  • Supervisor: Prof. Dr. Günter Quast

Projects

My profile on GitHub: thomas-mueller

Artus – Framework for event-based data analysis written in C++

Artus is designed as a general framework for arbitrary event-based data analysis with main applications high energy physics. Its basic functionallity includes reading n-tuple structured input data, an event loop, output and configuration techniques. The actual analyses are structured by processor modules organised in multiple pipelines. Producers perform calculations, filters apply cuts on event level and the tasks consumers is to write out the results. More information can be found together with the source code on  GitHub.

The framework tries to simply the collaboration of analysis groups. The implementation of basic building blocks of an analysis that everybody needs are shared in for the form of modules that can be plugged in into specialised analyses. Defining the modular structure it also helps to keep code clear and maintainable. The framework is sucessfully used by multiple German analysis groups working for the CMS experiment at CERN.

HarryPlotter – Framework for data postprocessing and plotting written in Python

The HarryPlotter framework is specialised on the plotting of results and has sophisticated features for reading histograms or other objects from ROOT files, either from the objects saved in the file or from trees or n-tuples. The program is organised in a modular fashion. Between the input and the plotting modules one can put analysis modules performing calculations on the input or the output of previous analysis modules. It is configurable via a command line interface or via python dictionaries or JSON files. HarryPlotter has been developed as an extension for Artus but can also be used independently of Artus. More information can be found together with the source code on  GitHub.

The main goal of the HarryPlotter framework is to centralise the reading of data structures from analysis outputs and the plotting of results. backends based on ROOT or based on Matplotlib are available. Furthermore, the results can be stored into files and used for further analysis steps. Analysis steps, that are not event-based and do not require good computing performance can be intuitively implemented in Python in the analysis modules. The used becomes the advantage of well tested input and output functionallities.

KITHiggsToTauTau – CMS H→ττ analysis code of the KIT group

The analysis code for the H→ττ Analyses in CMS of the EKP group at the KIT can be found on  GitHub. Main goals are the observation of H→ττ events and the measurement of properties of Higgs bosons coupling to τ leptons.

RooFiLab – ROOT fit for laboratory courses

RooFiLab has been developed in 2010 for fitting applications in the laboratory courses for physics students. It gives an educative approach to the fitting functions to measured data and the handling and propagation of correlated and uncorrelated uncertainties on the measurements. Based on ROOT and Minuit it allows for fits including covariance matrixes.

 Source code
 Documentation

Presentations

Title Conference/Meeting Place Date Download
Preparations for Upcoming H→ττ Analyses in CMS DPG Frühjahrstagung 2015 Wuppertal March 2015  Talk
Evidence for the 125 GeV Higgs boson decaying into Taus Tau 2014 Aachen September 2014  Talk
Preparations for the Spin and Parity Measurement of the Higgs Boson in the H→ττ Channel DPG Frühjahrstagung 2014 Mainz March 2014  Talk
Search for the Higgs Boson Decaying into Pairs of Tau Leptons Further Decaying into Same-Flavour Leptons EPS HEP 2013 Stockholm July 2013  Poster
Study of Higgs Boson Decays in Pairs of Tau-Leptons at the CMS Experiment at the LHC DPG Frühjahrstagung 2013 Dresden March 2013  Talk
Multivariate Analysis of Z/H→ττ Events at the CMS Experiment DPG Frühjahrstagung 2012 Göttingen February 2012  Talk

Publications

Title Author(s) Reference Year Download
Analysis of Standard Model Higgs Boson Decays to Tau Pairs with the CMS Detector at the LHC Thomas Müller IEKP-KA/2015-24, CERN-THESIS-2015-224 2015  PhD thesis
ARTUS - A Framework for Event-based Data Analysis in High Energy Physics Thomas Müller et al. arXiv:1511.00852 2015  Paper
Reconstruction and identification of tau lepton decays to hadrons and tau neutrino at CMS CMS Collaboration CMS-TAU-14-001, arXiv:1510.07488 2015  Paper
Evidence for the 125 GeV Higgs Boson Decaying into Taus at the CMS Experiment Thomas Müller NPPP (2015), pp. 207-210 2015  Proceeding
Evidence for the 125 GeV Higgs boson decaying to a pair of τ leptons CMS Collaboration JHEP 1405 (2014) 104 2014  Paper
Search for the Higgs Boson Decaying into Pairs of Tau Leptons Further Decaying into Same-Flavour Leptons Thomas Müller PoS (EPS-HEP 2013) 102 2013  Proceeding
Suppression of the Z Background for the Higgs Search in the H→ττ Channel by a Multivariate Analysis of ττ Final States in pp Collisions the LHC Thomas Müller IEKP-KA/2012-14 2012  Diploma thesis