S. Schumann
A5084444551- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Distributed and Parallel Computing Systems
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Nuclear physics research studies
- Terahertz technology and applications
- Atomic and Molecular Physics
- Particle Accelerators and Free-Electron Lasers
- Cosmology and Gravitation Theories
- Ion-surface interactions and analysis
- Neutrino Physics Research
- Superconducting and THz Device Technology
- Black Holes and Theoretical Physics
- Superconducting Materials and Applications
- Photonic and Optical Devices
- Spectroscopy and Laser Applications
- Medical Imaging Techniques and Applications
- Radiation Effects in Electronics
- Radiation Detection and Scintillator Technologies
- Scientific Computing and Data Management
- Advanced Data Storage Technologies
- Mass Spectrometry Techniques and Applications
University of Göttingen
2015-2024
Universität Hamburg
2017-2020
Institute of High Energy Physics
2020
Johannes Gutenberg University Mainz
2010-2017
Institute of Particle Physics
2017
Durham University
2017
University of Zurich
2016
Institute of High Energy Physics
2014-2016
Beijing Institute of Petrochemical Technology
2015
China Center of Advanced Science and Technology
2015
We compare different procedures for combining fixed-order tree-level matrix-element generators with parton showers. use the case of W-production at Tevatron and LHC to implementations so-called CKKW MLM schemes using cascades. find that although similar results are obtained in all cases, there important differences.
In this paper, we review recent theoretical progress and the latest experimental results in jet substructure from Tevatron LHC. We status of outlook for calculation simulation tools studying substructure. Following up on report Boost 2010 workshop, present a new set benchmark comparisons techniques, focusing variables grooming methods that are collectively known as 'top taggers'. To facilitate further exploration, have attempted to collect, harmonize publish software implementations these techniques.
Sherpa is a general-purpose Monte Carlo event generator for the simulation of particle collisions in high-energy collider experiments. We summarize essential features and improvements 2.2 release series, which heavily used generation analysis interpretation LHC Run 1 2 data. highlight decade developments towards ever higher precision particle-collision events.
We present a novel approach for the integration of scattering cross sections and generation partonic event samples in high-energy physics. propose an importance sampling technique capable overcoming typical deficiencies existing approaches by incorporating neural networks. The method guarantees full phase space coverage exact reproduction desired target distribution, our case given squared transition matrix element. study performance algorithm few representative examples, including top-quark...
First-principle simulations are at the heart of high-energy physics research program. They link vast data output multi-purpose detectors with fundamental theory predictions and interpretation. This review illustrates a wide range applications modern machine learning to event generation simulation-based inference, including conceptional developments driven by specific requirements particle physics. New ideas tools developed interface will improve speed precision forward simulations, handle...
Abstract We present an update of the Universal FeynRules Output model format, commonly known as UFO that is used by several automated matrix-element generators and high-energy physics software. detail different features have been proposed extensions initial format during last ten years, collect them in current second version we coin Feynman format. Following philosophy UFO, they consist flexible modular additions to address particle decays, custom propagators, form factors, renormalisation...
We describe a framework to develop, implement and validate any perturbative Lagrangian-based particle physics model for further theoretical, phenomenological experimental studies. The starting point is FeynRules, Mathematica package that allows generate Feynman rules Lagrangian then, through dedicated interfaces, automatically pass the corresponding relevant information supported Monte Carlo event generator. prove power, robustness flexibility of this approach by presenting few examples new...
We present a Monte-Carlo approach to prompt-photon production, where photons and QCD partons are treated democratically. The photon fragmentation function is modelled by an interleaved QCD+QED parton shower. This known technique improved including higher-order real-emission matrix elements. To this end, we extend recently proposed algorithm for merging elements truncated showers. exemplify the quality of predictions comparing them measurements at LEP prompt diphoton production from Tevatron...
This report summarizes the activities of SM and NLO Multileg Working Group Workshop "Physics at TeV Colliders", Les Houches, France 8-26 June, 2009.
We present the implementation and validation of techniques used to efficiently evaluate parametric perturbative theoretical uncertainties in matrix-element plus parton-shower simulations within Sherpa event-generator framework. By tracing full $\alpha_s$ PDF dependences, including component, as well fixed-order scale uncertainties, we compute variational event weights on-the-fly, thereby greatly reducing computational costs obtain theoretical-uncertainty estimates.
The generation of unit-weight events for complex scattering processes presents a severe challenge to modern Monte Carlo event generators. Even when using sophisticated phase-space sampling techniques adapted the underlying transition matrix elements, efficiency generating from weighted samples can become limiting factor in practical applications. Here we present novel two-staged unweighting procedure that makes use neural-network surrogate full weight. algorithm significantly accelerate...
Abstract Theoretical predictions for particle production cross sections and decays at colliders rely heavily on perturbative Quantum Chromodynamics (QCD) calculations, expressed as an expansion in powers of the strong coupling constant α S . The current <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi class="MJX-tex-calligraphic" mathvariant="script">O</mml:mi> <mml:mo stretchy="false">(</mml:mo> <mml:mn>1</mml:mn> <mml:mo>%</mml:mo>...
We present a fully automated framework as part of the Sherpa event generator for computation tree-level cross sections in beyond Standard Model scenarios, making use model information given Universal FeynRules Output format. Elementary vertices are implemented into C++ code automatically and provided to matrix-element Comix at runtime. Widths branching ratios unstable particles computed from same building blocks. The corresponding decays simulated with spin correlations. Parton showers, QED...
This report summarises the properties of Standard Model processes at 100 TeV pp collider. We document production rates and typical distributions for a number benchmark processes, discuss new dynamical phenomena arising highest energies available this intrinsic physics interest in measurement these as well their role backgrounds New Physics searches.
This report summarises the properties of Standard Model processes at 100 TeV pp collider. We document production rates and typical distributions for a number benchmark processes, discuss new dynamical phenomena arising highest energies available this intrinsic physics interest in measurement these as well their role backgrounds New Physics searches.
A bstract We present a phenomenological study of angularities measured on the highest transverse-momentum jet in LHC events that feature associate production Z boson and one or more jets. In particular, we angularity distributions are jets with without SoftDrop grooming procedure. begin our analysis exploiting state-of-the-art Monte Carlo parton shower simulations quantitatively assess impact next-to-leading order (NLO) matching merging procedures. then move to analytic resummation arrive at...