Nicolas Greiner
A5028805783- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Black Holes and Theoretical Physics
- Distributed and Parallel Computing Systems
- Cosmology and Gravitation Theories
- Dark Matter and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Computational Physics and Python Applications
- Advanced NMR Techniques and Applications
- Neutrino Physics Research
- Cross-Border Cooperation and Integration
- Scientific Computing and Data Management
- French Urban and Social Studies
- Innovation, Technology, and Society
- Business Strategy and Innovation
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Protein Structure and Dynamics
- International Science and Diplomacy
- European Socioeconomic and Political Studies
- Algorithms and Data Compression
- Technology, Environment, Urban Planning
- Health and Medical Studies
Université de Lorraine
2018-2022
Laboratoire de Géographie Physique
2018-2022
Centre de Recherche en Géographie
2018-2022
University of Zurich
2007-2018
Michigan State University
2014-2017
SLAC National Accelerator Laboratory
2016-2017
European Organization for Nuclear Research
2016-2017
Max Planck Institute for Physics
2012-2016
University of California, Santa Barbara
2016
Institute for Physics
2016
This Report summarizes the results of activities in 2012 and first half 2013 LHC Higgs Cross Section Working Group. The main goal working group was to present state art Physics at LHC, integrating all new that have appeared last few years. report follows Handbook Sections: 1. Inclusive Observables (CERN-2011-002) second 2. Differential Distributions (CERN-2012-002). After discovery a boson mid-2012 this focuses on refined prediction Standard Model (SM) phenomenology around experimentally...
We present the version 2.0 of program package GoSam for automated calculation one-loop amplitudes. is devised to compute QCD and/or electroweak corrections multi-particle processes within and beyond Standard Model. The new code contains improvements in generation reduction amplitudes, performs better computing time numerical accuracy, has an extended range applicability. "Binoth-Les-Houches-Accord" interface Monte Carlo programs also implemented. give a detailed description installation...
We present the program package GoSam which is designed for automated calculation of one-loop amplitudes multi-particle processes in renormalisable quantum field theories. The amplitudes, are generated terms Feynman diagrams, can be reduced using either D-dimensional integrand-level decomposition or tensor reduction. used to calculate QCD and/or electroweak corrections Standard Model and offers flexibility link model files theories Beyond Model. A standard interface programs calculating real...
This Report summarizes the proceedings of 2015 Les Houches workshop on Physics at TeV Colliders. Session 1 dealt with (I) new developments relevant for high precision Standard Model calculations, (II) PDF4LHC parton distributions, (III) issues in theoretical description production Higgs bosons and how to relate experimental measurements, (IV) a host phenomenological studies essential comparing LHC data from Run I predictions projections future measurements II, (V) Monte Carlo event generators.
We present the calculation of cross section and invariant mass distribution for Higgs boson pair production in gluon fusion at next-to-leading order (NLO) QCD. Top-quark masses are fully taken into account throughout calculation. The virtual two-loop amplitude has been generated using an extension program GoSam supplemented with interface to Reduze integral reduction. occurring integrals have calculated numerically SecDec. Our results, including full top-quark dependence first time, allow us...
This Report summarizes the proceedings of 2015 Les Houches workshop on Physics at TeV Colliders. Session 1 dealt with (I) new developments relevant for high precision Standard Model calculations, (II) PDF4LHC parton distributions, (III) issues in theoretical description production Higgs bosons and how to relate experimental measurements, (IV) a host phenomenological studies essential comparing LHC data from Run I predictions projections future measurements II, (V) Monte Carlo event generators.
We study the effects of exact top quark mass-dependent two-loop corrections to Higgs boson pair production by gluon fusion at LHC and a 100 TeV hadron collider. perform detailed comparison full next-to-leading order result various approximations level differential distributions also analyse non-standard self-coupling scenarios. find that different differ from up 50 percent in relevant distributions. This clearly stresses importance NLO result.
This report summarizes the activities of SM and NLO Multileg Working Group Workshop "Physics at TeV Colliders", Les Houches, France 8-26 June, 2009.
Author(s): Contino, R; Curtin, D; Katz, A; Mangano, ML; Panico, G; Ramsey-Musolf, MJ; Zanderighi, Anastasiou, C; Astill, W; Bambhaniya, Behr, JK; Bizon, Dev, PS Bhupal; Bortoletto, Buttazzo, Cao, Q-H; Caola, F; Chakrabortty, J; Chen, C-Y; S-L; Florian, D de; Dulat, Englert, Frost, JA; Fuks, B; Gherghetta, T; Giudice, Gluza, Greiner, N; Gray, H; Hartland, NP; Issever, Jelinski, Karlberg, Kim, JH; Kling, Lazopoulos, Lee, SJ; Liu, Y; Luisoni, Mazzitelli, Mistlberger, Monni, P; Nikolopoulos, K;...
Until now, a phenomenologically complete analysis of the hh+2j channel at LHC has been missing. This is mostly due to high complexity involved one-loop gluon fusion contribution and fact that reliable estimate thereof cannot be obtained through simplified calculations in mt→∞ limit. In this Letter, we report on LHC's potential access di-Higgs production association with two jets fully showered hadron-level analysis. Our study includes finite top bottom mass dependencies for contribution.
This report summarises the physics opportunities for study of Higgs bosons and dynamics electroweak symmetry breaking at 100 TeV pp collider.
We report on the calculation of cross section for Higgs boson production in association with three jets via gluon fusion, at next-to-leading-order (NLO) accuracy QCD, infinite top-mass approximation. After including complete NLO QCD corrections, we observe a strong reduction scale dependence result, and an increased steepness transverse momentum distributions both leading jets. The results are obtained combined use GoSam, Sherpa, MadDipole/MadEvent framework.
The 2011 Les Houches workshop was the first to confront LHC data. In two years since previous there have been significant advances in both soft and hard QCD, particularly areas of multi-leg NLO calculations, inclusion those calculations into parton shower Monte Carlos, tuning non-perturbative parameters Carlos. These proceedings describe theoretical that taken place, impact early data, for future development.
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.
We study nonstandard top quark couplings in the effective field theory approach. All nine dimension-six operators that generate anomalous between electroweak gauge bosons and third-generation quarks are included. calculate their contributions at tree level one loop to all major precision observables. The calculations compared with data obtain constraints on eight of these operators.
The search for di-Higgs production at the LHC in order to set limits on Higgs trilinear coupling and constraints new physics is one of main motivations high-luminosity phase. Recent experimental analyses suggest that such will only be successful if information from a range channels included. We therefore investigate association with two hadronic jets give detailed discussion both gluon- weak boson-fusion (WBF) contributions, particular emphasis phenomenology modified quartic gauge couplings....