A5058168522- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Computational Physics and Python Applications
- Neutrino Physics Research
- Distributed and Parallel Computing Systems
- Particle Detector Development and Performance
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Scientific Research and Discoveries
- International Science and Diplomacy
- Advanced Data Storage Technologies
- Systems Engineering Methodologies and Applications
- ECG Monitoring and Analysis
- Geophysics and Gravity Measurements
- Parallel Computing and Optimization Techniques
- Advanced Electrical Measurement Techniques
- Research Data Management Practices
- Atomic and Subatomic Physics Research
- History and advancements in chemistry
- Radio Astronomy Observations and Technology
- Electromagnetic Scattering and Analysis
University of Tübingen
2021-2024
University of Freiburg
2011-2022
University of Southern Denmark
2016-2022
RWTH Aachen University
2020
European Organization for Nuclear Research
2012-2014
Laboratoire de Physique Subatomique et de Cosmologie
2014
Max Planck Institute for Physics
2005-2014
Karlsruhe Institute of Technology
2009-2014
Instituto de Física de Cantabria
2007-2014
Universidad de Antioquia
2014
For the interpretation of signal discovered in Higgs searches at LHC it will be crucial particular to discriminate between minimal sector realized standard model (SM) and its most commonly studied extension, supersymmetric (MSSM). The measured mass value, having already reached level a precision observable with an experimental accuracy about 500 MeV, plays important role this context. In MSSM light CP-even boson, Mh, can directly predicted from other parameters model. prediction should least...
This Report summarizes the results of first 10 months' activities LHC Higgs Cross Sections Working Group. The main goal working group was to present status-of-art on Physics at integrating all new that have appeared in last few years. is more than a mere collection proceedings general meetings. subgroups been different directions. An attempt has made from these complete and homogeneous form. subgroups' contributions correspondingly comprise parts Report. A significant amount work performed...
Abstract Predictions for the Higgs masses are a distinctive feature of supersymmetric extensions Standard Model, where they play crucial role in constraining parameter space. The discovery boson and remarkably precise measurement its mass at LHC have spurred new efforts aimed improving accuracy theoretical predictions models. “ Precision SUSY Mass Calculation Initiative ” (KUTS) was launched 2014 to provide forum discussions between different groups involved these efforts. This report aims...
A bstract Gluon-induced contributions to the associated production of a Higgs and Z boson are calculated with NLO accuracy in QCD. They constitute significant contribution cross section for this process. The perturbative correction factor ( K -factor) is limit infinite top-quark vanishing bottom-quark masses. qualitative similarity results well-known ones gluon-fusion process gg → H allows conclude that rescaling LO prediction by -factor leads reliable result realistic error estimate due...
Much of the discussion regarding future measurements Higgs boson mass and self-coupling is focused on how well various collider options can do. In this article we ask a physics-based question do need colliders to measure these quantities have an impact discovery new physics or in understand role nature. We address within framework Standard Model beyond scenarios, including supersymmetry theories composite bosons. conclude that LHC's stated ability better than 150 MeV will be as good ever...
This paper summarizes the physics potential of CLIC high-energy e+e- linear collider. It provides input to Snowmass 2013 process for energy-frontier working groups on The Higgs Boson (HE1), Precision Study Electroweak Interactions (HE2), Fully Understanding Top Quark (HE3), as well Path Beyond Standard Model -- New Particles, Forces, and Dimensions (HE4). is accompanied by a describing accelerator study, submitted Frontier Capabilities group process.
We present the activities of "New Physics" working group for "Physics at TeV Colliders" workshop (Les Houches, France, 3--21 June, 2013). Our report includes new computational tool developments, studies implications Higgs boson discovery on physics, important signatures searches natural physics LHC, flavour aspects and assessments interplay between direct dark matter LHC.
We discuss the allowed parameter spaces of supersymmetric scenarios in light improved Higgs mass predictions provided by FeynHiggs 2.10.0. The combine Feynman-diagrammatic results with a resummation leading and subleading logarithmic corrections from stop/top sector, which yield significant improvement region large stop masses. Scans pMSSM space show that, for given values soft supersymmetry-breaking parameters, new contributions beyond two-loop order implemented tend to give larger CP-even...
We perform the renormalization of different types Two-Higgs-Doublet Models for calculation observables at next-to-leading order. In detail, we suggest four schemes based on on-shell conditions as far possible and $$ \overline{\mathrm{MS}} prescriptions remaining field-mixing parameters where no distinguished condition exists make contact to existing in literature. particular, treat tadpole diagrams ways discuss issues gauge independence perturbative stability considered schemes. The group...
Most of the discussion regarding Higgs boson couplings to Standard Model vector bosons and fermions is presented with respect what present future collider detectors will be able measure. Here, we ask more physics-based question how well do need measure couplings? We first a reasonable definition ``need'' then investigate answer in context various highly motivated new physics scenarios: supersymmetry, mixed-in hidden sector bosons, composite boson. find largest coupling deviations away from...
For a reliable prediction of the NMSSM Higgs boson signatures at present and future high-energy colliders proper distinction MSSM sector precise knowledge masses including higher-order corrections is indispensable. In this paper, one-loop to neutral mixings are calculated in three different renormalisation schemes. addition $\bar{DR}$ scheme, existing literature, two other schemes adopted. Furthermore, dependence on value top quark mass investigated. The resulting have been compared residual...
We calculate the two-loop contributions from a modified trilinear Higgs self-interaction, ${\ensuremath{\kappa}}_{\ensuremath{\lambda}}{\ensuremath{\lambda}}_{\mathrm{SM}}v{h}^{3}$, to electroweak oblique parameters $S$ and $T$. Using current bounds on $T$ measurements, we find 95% C.L. constraint coupling be $\ensuremath{-}14.0\ensuremath{\le}{\ensuremath{\kappa}}_{\ensuremath{\lambda}}\ensuremath{\le}17.4$. The largest effects arise two insertions of that result in...
A bstract The Next-to-Minimal Supersymmetric Extension of the Standard Model (NMSSM) with a Higgs sector containing five neutral and two charged bosons allows for rich phenomenology. In addition, plethora parameters provides many sources CP violation. contrast to Minimal Extension, violation in is already possible at tree-level. For reliable understanding interpretation experimental results boson search, proper distinction sectors provided by or extensions, masses have be known as precisely...
Abstract In a supersymmetric theory, large mass hierarchies can lead to uncertainties in fixed-order calculations of the Standard Model (SM)-like Higgs mass. A reliable prediction is then obtained by performing calculation an effective field theory (EFT) framework, involving matching full at high scale include contributions from heavy particles, and subsequent renormalisation-group running down low scale. We report on SM-like within CP-violating next-to-minimal extension SM (NMSSM) scenario...
We present a consistent renormalization of the top and bottom quark/squark sector MSSM with complex parameters (cMSSM). Various schemes are defined, analyzed analytically tested numerically in decays Stop_2 -> Sbot_i H+/W+ (i = 1,2). No scheme is found that produces acceptable results over all cMSSM parameter space, where problems occur mostly already for real parameters. Two identified show most robust behavior. A numerical analysis four partial stop decay widths performed our "preferred"...