Jürgen Reuter
A5033141791- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Distributed and Parallel Computing Systems
- Computational Physics and Python Applications
- Particle Accelerators and Free-Electron Lasers
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Digitalization, Law, and Regulation
- Neutrino Physics Research
- Superconducting Materials and Applications
- Service-Oriented Architecture and Web Services
- Parallel Computing and Optimization Techniques
- German Security and Defense Policies
- International Science and Diplomacy
- Semantic Web and Ontologies
- Advanced Database Systems and Queries
- Particle accelerators and beam dynamics
- Flexible and Reconfigurable Manufacturing Systems
- Criminal Law and Policy
- Scientific Computing and Data Management
- Noncommutative and Quantum Gravity Theories
- Corporate Governance and Management
Deutsches Elektronen-Synchrotron DESY
2005-2024
Technologie- und Förderzentrum
2016-2019
University of Liverpool
2019
Max Planck Society
2019
University of Siegen
2015-2019
Johannes Gutenberg University Mainz
2016-2019
University of Vienna
2019
Eurostat
2016
Global Strategy Group
2016
University of Freiburg
2008-2012
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...
I sketch the architecture of O'Mega, a new optimizing compiler for tree amplitudes in quantum field theory. O'Mega generates most efficient code currently available scattering many polarized particles standard model. A complete infrastructure physics beyond model is provided.
The International Linear Collider is now proposed with a staged machine design, the first stage at 250 GeV luminosity goal of 2 ab-1. In this paper, we review physics expectations for machine. These include precision measurements Higgs boson couplings, searches exotic decays, other particles that decay zero or small visible energy, and e+e- annihilation to W+W- 2-fermion states improved sensitivity. A summary table gives projections achievable levels based on latest full simulation studies.
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 summarize the physics case for International Linear Collider (ILC). review key motivations ILC presented in literature, updating projected measurement uncertainties experiments accord with expected schedule of operation accelerator and results most recent simulation studies.
Motivated by the recent diphoton excesses reported both ATLAS and CMS collaborations, we suggest that a new heavy spinless particle is produced in gluon fusion at LHC decays to couple of lighter pseudoscalars which then decay photons. The resonances could arise from strongly interacting sector Standard Model gauge bosons only via corresponding Wess-Zumino-Witten anomaly. We present detailed recast newest 13 TeV data together with 8 scan consistency parameter space for those resonances.
Neutrinos are the most elusive particles known. Heavier sterile neutrinos mixing with standard might solve mystery of baryon asymmetry universe. In this letter, we show that among all future energy frontier accelerators, muon colliders will provide farthest search reach for such mass ranges above $Z$ pole into multi-TeV regime. We compare performance electron same machine and briefly discuss complementarity in flavor space between two types accelerators.
The mechanism of electroweak symmetry breaking in little Higgs models is analyzed an effective field theory approach. This enables us to identify observable effects irrespective the specific structure and content heavy degrees freedom. We parametrize these a common operator basis present complete set anomalous contributions gauge boson, fermion couplings. If hypercharge assignments model retain their standard form, precision data are affected only via S T parameters by contact interactions....
The Compact Linear Collider (CLIC) is a mature option for the future of high energy physics. It combines benefits clean environment $e^+e^-$ colliders with operation at centre-of-mass energies, allowing to probe scales beyond reach Large Hadron (LHC) many scenarios new This places CLIC project privileged spot in between precision and frontiers, capabilities that will significantly extend knowledge on both fronts end LHC era. In this report we review revisit potential search, directly...
Weak vector-boson $W,Z$ scattering at high energy probes the Higgs sector and is most sensitive to any new physics associated with electroweak symmetry breaking. We show that in presence of 125 GeV boson, a conventional effective-theory analysis fails for this class processes. propose extrapolate ansatz by an extension parameter-free $K$-matrix unitarization prescription, which we denote as direct $T$-matrix unitarization. generalize prescription arbitrary nonperturbative models describe...
Insight into the electroweak (EW) and Higgs sectors can be achieved through measurements of vector boson scattering (VBS) processes. The EW bosons are rare processes that precisely predicted in Standard Model (SM) closely related to mechanism. Modifications VBS also models physics beyond SM (BSM), for example changes couplings gauge resonant production new particles. In this review, experimental results theoretical developments at Large Hadron Collider, its high luminosity upgrade, future...
This is the summary and introduction to proceedings contributions for Les Houches 2009 "Tools Monte Carlo" working group.
We report the results of a computation full next-to-leading order QCD corrections to production two bb pairs at LHC. This calculation parton level provides predictions for well separated b jets. The show that lead an enhancement cross section central scale choice by roughly 50% with respect leading result. theoretical uncertainty estimated variation renormalization and factorization scales is strongly reduced inclusion corrections.
With the discovery of Higgs boson, spectrum particles in Standard Model (SM) is complete. It more important than ever to perform precision measurements and test for deviations from SM predictions electroweak sector. In this report, we investigate two themes arena measurements: observables (EWPOs) that particle content couplings minimal supersymmetric SM, involving multiple gauge bosons final state which provide unique probes basic tenets symmetry breaking. Among EWPOs focus our discussion on...
In the path towards a muon collider with center of mass energy 10 TeV or more, stage at 3 emerges as an appealing option. Reviewing physics potential such is main purpose this document. order to outline progression performances across stages, few sensitivity projections for higher are also presented. There many opportunities probing new collider. Some them in common extensively documented case CLIC stage, and include measuring Higgs trilinear coupling testing possible composite nature boson...
A bstract Neutrinos are among the most mysterious particles in nature. Their mass hierarchy and oscillations, as well their antiparticle properties, being intensively studied experiments around world. Moreover, many models of physics beyond Standard Model, baryon asymmetry or dark matter density Universe explained by introducing new species neutrinos. Among others, heavy neutrinos Dirac Majorana nature were proposed to solve open questions High Energy Physics. Such with masses above...
A bstract In this paper we investigate how well the nature of heavy neutral leptons can be determined at a future lepton collider, after its potential discovery. Considered in simplified model are prompt decays neutrino mass range from 100 GeV to 10 TeV. We study event selection and application multivariate analyses determine whether such newly discovered particle is Dirac or Majorana nature. Combining charge kinematic variables, find that neutrino, it particle, 95% C.L. almost whole...
Extensions of the Standard Model elementary particle physics to noncommutative geometries have been proposed as a low-energy limit string models. Independent this motivation, one may consider such model an effective field theory with higher-dimensional operators containing antisymmetric rank-two background field. We study signals Noncommutative (NCSM) and analyze discovery potential future photon collider, considering angular distributions in fermion pair production.
Abstract While Monte Carlo event generators like Whizard have become indispensable tools in studying the impact of new physics on collider observables over last decades, implementation models such packages has remained a rather awkward and error-prone process. Recently, FeynRules package was introduced which greatly simplifies this process by providing single unified model format from implementations for many different codes can be derived automatically. In note, we present an interface...