II. Institute of Physics

Prof. Dr. Arnulf Quadt

Research Interests

My research interests involve a deeper understanding of Quantum-Chromodynamics and electroweak symmetry breaking, in particular physics of the top-quark and of the Higgs-boson. Together with my working group, I was involved in the discovery of the Higgs-boson with the ATLAS-experiment at the Large Hadron Collider (LHC) at CERN in Geneva, Switzerland. There, where proton-proton collisions at energies of 13/14 TeV are investigated. These collision energies, the highest ever achieved at a collider, allow us to produce heavy fundamental particles such as the top-quark or the Higgs-boson, and study their properties and interactions.

With the available wealth of ATLAS-data, we presently focus on studies of the properties of the top-quark and the Higgs-boson, in particular their quantum numbers and their gauge couplings. Of special focus are presently the electromagnetic, the neutral current electroweak, the charged current electroweak and the strong gauge coupling of the top-quark, and the Higgs-Yukawa coupling to the tau-lepton, the b-quark and the top-quark. Those measurements will provide us insights into precision tests of the Standard Model of elementary particle physics and sensitivity to physics beyond the Standard Model.

In addition, we contribute to the development and upgrade of the ATLAS Pixel detector. With the upcoming upgrade of the Large Hadron Collider (high lumi LHC, HL-LHC, which will increase the beam intensity and hence the luminosity, in particular the inner tracking detector will have to face new challenges. The data readout rate will increase dramatically. Furthermore, the radiation exposure of the sensor material and readout electronics will reach unprecedented levels so that new radiation-hard sensors and electronics needs to be developed. Focus of our efforts is R&D of new sensors, readout electronics, testbeam organisation and analysis, module assembly and others.

Furthermore, the amount and nature of real and simulated data, required for the analysis of LHC data and the extraction of physics results reaches unprecedented quantities and complexity. The world-wide LHC computing grid (WLCG) collaboration provides national and international computing resources to address this challenge. In this context, we run and operate a Tier-2 and Tier-3 grid computing center, called "Goegrid" and conduct research in monitoring grid resources, integrating cloud computing resources and improving performance.

Research Group

Academics and Post-Doctoral Fellows

  • Priv.-Doz. Dr. Ralf Bernhard (Privatdozent, assoziiert)
  • Priv.-Doz. Dr. Jörn Große-Knetter (Privatdozent)
  • Priv.-Doz. Dr. Markus Keil (Privatdozent, assoziiert)
  • Dr. Marcello Bindi (wissenschaftlicher Angestellter)
  • Dr. Steffen Korn (wissenschaftlicher Angestellter)
  • Dr. Inga Lakomiec (wissenschaftliche Angestellte)
  • Dr. Baptiste Ravina (wissenschaftlicher Angestellter)
  • Dr. Elizaveta Shabalina (wissenschaftliche Angestellte)
  • Dr. Ali Skaf (wissenschaftlicher Angestellter)
  • Dr. Sebastian Wozniewski (wissenschaftlicher Angestellter)

PhD Students

  • Wael Alkakhi
  • Matthias Drescher
  • Stephen Eggebrecht
  • Matthew Kingston
  • Andreas Kirchhoff
  • Marcel Niemeyer
  • Saidev Polisetty
  • Chris Scheulen
  • Sreelakshmi Sindhu
  • Yusong Tian

Master's Students

  • Samuel Erdmann
  • Clinton Gonsalves
  • Abdulrahman (Budi) Hassan
  • Tobias Moritz
  • Sophia Pennuttis
  • Sebastian Preuth
  • Ireas Raschke
  • Theresa Reisch
  • Dennis Rodermund
  • Tim Schlömer
  • Daniel Werner
  • Paul Wollenhaupt
  • Kia-Jüng Yang
  • Ughur Mammadzada

Bachelor's Students

  • Niklas Grün



Teaching


Community Service


Outreach


Selected Publications

  • S. Chekanov et al. (ZEUS Collaboration), "Measurement of the neutral current cross section and F2 structure function for deep inelastic e+p scattering at HERA", Eur. Phys. J. C 21 (2001) 443
  • C. Patrignani et al. (Particle Data Group), "Review of Particle Physics", Chin. Phys. C 40 (2016) 100001
  • A. Quadt, "Top quark physics at hadron colliders", Eur. Phys. J. C 48 (2006) 835
  • The LEP Working Group for Higgs Boson searches, "Search for the Standard Model Higgs Boson at LEP", Phys. Lett. B 565 (2003) 61
  • ATLAS Collaboration, "Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC", Phys. Lett. B 716 (2012) 129
  • ATLAS Collaboration, "Evidence for the Higgs-boson Yukawa coupling to tau leptons with the ATLAS detector", JHEP 04 (2015) 117

A full list of publications can be found here.

Work History and Education

  • 1990–1993: student of physics and mathematics at University of Bonn
  • 1993–1996: DPhil student at University of Oxford on ZEUS experiment at HERA
  • 1997–1998: PostDoc at University of Oxford on ZEUS experiment at HERA
  • 1997: MSc by research student at University of Oxford on ZEUS experiment at HERA
  • 1999–2000: CERN research fellow on OPAL experiment at LEP and on CMS experiment at LHC
  • 2000–2001: CERN research staff on OPAL experiment at LEP and on CMS experiment at LHC
  • 2001–2006: junior faculty (Hochschulassistent) at University of Bonn on D0 experiment at Tevatron, OPAL experiment at LEP and ATLAS experiment at LHC
  • 2003–2005: visiting assistent professor at Rochester University/NY and Fermilab/Batavia with Tom Ferbel as AvH Feodor-Lynen fellow
  • 2005–2006: interim professor in experimental particle physics at University of Göttingen
  • 2006: Habilitation at University of Bonn on "Top Quark Physics at Hadron Colliders"
  • 2006: DFG-Heisenberg fellow at Max-Planck-Institute for Physics (Werner-Heisenberg-Institut) on ATLAS experiment at LHC
  • 2006 – now: full professor at Georg-August-University of Göttingen on ATLAS experiment at LHC and on D0 experiment at Tevatron.