Brief Curriculum Vitae
- since 2006: at IPPP Durham
- 2003-2006: Junior Professor at TU Dresden
- 2002-2003: Postdoc at CERN
- 2000-2001: Postdoc at Cavendish Lab, Cambridge, UK
- 1999-2000: Postdoc at Technion, Haifa, Israel
- 1994-1998: PhD student at TU Dresden, supervised by Gerhard Soff
- 1988-1994: Undergraduate studies at TH Darmstadt.
Diploma thesis supervised by Thomas Mannel and Thorsten Ohl
Here's my listing from Spires.
My research area is the phenomenology of particle physics - this is the branch of theoretical physics that bridges the gap between theorists who construct more abstract models for the fundamental interaction of the constituents of the matter in the Universe at the smallest distances, and the experimenters that search for and measure phenomena, for example at the LHC at CERN. Phenomenologists use these models, new and old, to make predictions for observables in experiments or to calculate quantities that allow the experimenters to interpret their data as measurements of fundamental quantities.
My role in this is the construction of a simulation tool that tries to describe the experimental reality in great detail. Tools such as the ones I work on are also called event generators, since they generate "events", the plethora of particles that are produced when particles smash into each other at large energies. In these relatively violent collision the large energies of the incident beam particles are translated into showers of elementary particles which hit the detector at velocities very close to the speed of light. Event generators are the workhorses of particle physics, and are deployed for a wide range of purposes: Their output -- the simulated events -- is utilised to better understand detector responses to the interaction with incident particles, to help in the planning of analyses by providing an understanding of interesting signals and their backgrounds, to subtract backgrounds from signals, and to compare the most precise calculations directly with data. To fulfil these functions, they must contain all relevant physics, from the highest energies of the order of a few TeV down to the relatively low scales of MeV that characterise hadron physics. Traditional methods of evaluating quantum field theories, based upon the perturbative expansion in coupling constants, cannot fulfil this, due to two limitations: The sheer number of outgoing particles leads to a computational complexity we cannot conquer yet, and many of the produced particles are hadrons, bound states of the fundamental quarks and gluons, which form the hadrons in a phase transition that we cannot yet describe in a quantitative way. These two problems are addressed in event generators by decomposing the simulation into different phases, characterised by vastly different energy scales.
The event generator project I work on - now for more than 15 years - is called SHERPA.
We are a team of about 10 people or so from 5 countries on two continents, who work on the development, maintenance, deployment and validation of our tool.
To be more specific (and more for the specialists), here are my current research topics:
- automatic calculation for multi-leg processes in - nearly arbitrary - models (matrix element generation and phase spacing)
- better description of perturbative QCD radiation through parton showers
- the connection of the parton showers to the hard sub-process - by now this can be done at next-to leading order accuracy in Sherpa for practically arbitrary processes and at next-to-next-to leading order for two relatively simple ones
- the interface to non-perturbative QCD (fragmentation of the partons into colourless hadrons)
- multiple interactions and the structure of hadrons
- (new) physics at collider experiments
In addition, I collaborate with experimenters from the ATLAS collaboration on measurements of Double Parton Scattering - events where more than one pair of energetic quarks or gluons collides inside a single proton-proton scattering and gives rise to highly energetic particles.
I am also the Primary Investigator of the HEPData project, the central repository for the long-term preservation of data from collider experiments such as the LHC. It currently contains the results from more than 8000 experimental papers, spanning nearly 5 decades, in about 65,000 tables, histograms and plots.
Past and current students
I enjoy the privilege of having worked or still working with a number of highly talented and motivated young scientists:
|Silvan Kuttimalai||Durham, 2016||postdoc at SLAC, Stanford, USA||Spires|
|Jennifer Thompson||Durham, 2014||postdoc at U Goettingen||postdoc at U Heidelberg||Spires|
|Oliver Hall||Durham, 2013||private sector|
|Jennifer Archibald||Durham, 2011||private sector||Spires|
|Marek Schoenherr||Dresden, 2012||postdoc IPPP Durham||postdoc at U Zurich||Spires|
|Frank Siegert||Durham 2010||postdoc at Freiburg||Junior Research Group leader at TU Dresden, Germany||Spires|
|Stefan Hoeche||Durham, 2008||postdocs at U Zurich, and SLAC (Stanford)||Staff Scientist at SLAC, Stanford||Spires|
|Jan Winter||Dresden, 2008||postdocs at Fermilab, CERN, MPI Munich||Michigan U||Spires|
|Tanju Gleisberg||Dresden, 2008||postdoc at SLAC||private sector||Spires|
|Steffen Schumann||Dresden 2007||postdocs at U Edinburgh, U Heidelberg||Professor at U Goettingen||Spires|
|Andreas Schaelicke||Dresden, 2005||postdocs at DESY-Zeuthen, U Edinburgh||private sector||Spires|
|Ralf Kuhn||Dresden, 2002||private sector||Spires|
Academic lectures on phenomenology at collider experiments, Monte Carlo event generators etc.:
- "QCD & Monte Carlo Event Generators"(3 lectures, during Maria Laach school 2016, Maria Laach, September 2016 and TRISEP school, Vancouver, June 2016)
- "QCD and Event Generators"(15 hours lectures during "Heidelberger Graduiertentage", Heidelberg, October 2014)
- "Precision Monte Carlo", during CTEQ school, Pittsburgh, July 2015
- "Introduction to Event generators"
(latest lectures linked from series of four lectures, at HiggsTools school, Pre Saint-Didier, June 2015; the MCnet summer school, Kyoto, September 2011; DESY MC school, Hamburg, March 2011; MCnet summer school, Lund, July 2009; Galileo Galilei Institute, September 2007; Fermilab-CERN Hadron Collider School, June 2007)
- "Phenomenology at colliders" (series of eight lectures, at the RAL high-energy physics summer school, 2008-2009)
- "ME+PS matching at LO and NLO" (SM@LHC, Florence, April 2015)
- "The Quest for highest Precision at Highest Energies" (IoP meeting 2015, Manchester, April 2015)
- "Precision Simulations for LHC Physics with Sherpa" (Seminar, Sheffield, January 2015)
- "Some Thoughts on Tops" (Top2014, Cannes, September 2014)
Current lectures in Durham
- "QCD" (postgraduate course, Epiphany terms 2015-2016)
Past lectures in Durham
- Theoretical Physics 2B - Quantum Mechanics, for second year students (Epiphany terms 2011-2014)
- Standard Model (postgraduate course, Michaelmas terms 2007-2009, with Problems)
- Simulations in High-Energy Physics (postgraduate course, Easter terms 2007-2010)
- Computational Physics, for second year students (Michaelmas term 2008, epiphany term 2010)
- Introduction to Particle Physics (Epiphany terms 2008-2010 & 2012)
- Maths, Part IB, for second year students (Michaelmas terms 2006-2009 with Example classes)
Past lectures (in Dresden)
- Quantum Field Theory (summer term 2004, winter term 2005/6, with Example classes and more example classes)
- Gauge Field Theory (winter term 2003/4, with Example classes)
- Quantum Mechanics for High-School Teacher students (summer term 2006, with Example classes)
- Relativistic Physics for High-School Teacher students (summer term 2006, with Example classes)
- Electrodynamics for High-School Teacher students (winter term 2004/5, with Example classes)
- Symmetries in Quantum Mechanics (winter term 2000/1)
- Quarks and Leptons (together with H.Lacker, summer term 2005)
- Computer Methods for Physics students (summer term 2002)
Outreach lecture (last)
- "Particle Physics at the LHC" (given at Ripon Grammar School, March 2014, 2015, 2016)