A5114377262- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Distributed and Parallel Computing Systems
- Medical Imaging Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Scientific Computing and Data Management
- Advanced Data Storage Technologies
- International Science and Diplomacy
- Nuclear reactor physics and engineering
- Atomic and Subatomic Physics Research
- Gamma-ray bursts and supernovae
- Radiation Detection and Scintillator Technologies
- Gaussian Processes and Bayesian Inference
- Nuclear Physics and Applications
- Big Data Technologies and Applications
- Radiation Therapy and Dosimetry
- Superconducting Materials and Applications
Fermi National Accelerator Laboratory
2016-2025
Institute of High Energy Physics
2015-2024
University of Cincinnati
2023-2024
University of Antwerp
2024
A. Alikhanyan National Laboratory
2022-2024
Northeastern University
2014-2023
University of Florida
2014-2023
Northwestern University
2015-2022
The Ohio State University
2017-2021
Princeton University
2017-2021
This document proposes a collection of simplified models relevant to the design new-physics searches at LHC and characterization their results. Both ATLAS CMS have already presented some results in terms models, we encourage them continue expand this effort, which supplements both signature-based benchmark model interpretations. A is defined by an effective Lagrangian describing interactions small number new particles. Simplified can equally well be described masses cross-sections. These...
This manual describes the Pythia event generator, most recent version of an evolving physics tool used to answer fundamental questions in particle physics. The program is often generate high-energy-physics collision “events”, i.e. sets particles produced association with two incoming high-energy particles, but has several uses beyond that. guiding philosophy produce and re-produce properties experimentally obtained collisions as accurately possible. includes a wide ranges reactions within...
This document is the final report of ATLAS-CMS Dark Matter Forum, a forum organized by ATLAS and CMS collaborations with participation experts on theories Matter, to select minimal basis set dark matter simplified models that should support design early LHC Run-2 searches. A prioritized, compact benchmark proposed, accompanied studies parameter space these repository generator implementations. also addresses how apply Effective Field Theory formalism for collider searches present results...
This document a outlines set of simplified models for dark matter and its interactions with Standard Model particles. It is intended to summarize the main characteristics that these have when applied searches at LHC, provide number useful expressions reference. The list includes both s-channel t-channel scenarios. For s-channel, spin-0 spin-1 mediations are discussed, also realizations where Higgs particle provides portal between visible sectors. guiding principles underpinning proposed...
We provide an overview of the status Monte-Carlo event generators for high-energy particle physics. Guided by experimental needs and requirements, we highlight areas active development, opportunities future improvements. Particular emphasis is given to physics models algorithms that are employed across a variety experiments. These common themes in generator development lead more comprehensive understanding at highest energies intensities, allow be tested against wealth data have been...
The PYTHIA program can be used to generate high-energy-physics `events', i.e. sets of outgoing particles produced in the interactions between two incoming particles. objective is provide as accurate possible a representation event properties wide range reactions, with emphasis on those where strong play role, directly or indirectly, and therefore multihadronic final states are produced. physics then not understood well enough give an exact description; instead has based combination...
In the era of precision physics measurements at LHC, efficient and exhaustive estimations theoretical uncertainties play an increasingly crucial role. context Monte Carlo (MC) event generators, estimation such traditionally requires independent MC runs for each variation, a linear increase in total run time. this work, we report on automated evaluation dominant (renormalization-scale non-singular) perturbative PYTHIA 8 generator, with only modest computational overhead. Each generated is...
We provide an overview of the status Monte-Carlo event generators for high-energy particle physics. Guided by experimental needs and requirements, we highlight areas active development, opportunities future improvements. Particular emphasis is given to physics models algorithms that are employed across a variety experiments. These common themes in generator development lead more comprehensive understanding at highest energies intensities, allow be tested against wealth data have been...
The Higgs sector of the minimal supersymmetric standard model (MSSM) consists five physical bosons, which offer a variety channels for their experimental search. present study aims to further our understanding Tevatron reach MSSM addressing relevant theoretical issues related SUSY parameter space, with special emphasis on radiative corrections down--quark and lepton couplings bosons large $\tan\beta$. We performed computation signal backgrounds production processes $W\phi$ $b \bar{b} \phi$...
We analyze the prospects for discovering supersymmetry at Fermilab Tevatron and CERN LEP colliders in scenario that lightest supersymmetric particle is a gravitino of mass \ensuremath{\lesssim}1 keV. consider particular case neutralino has nearly 100% branching fraction into gravitino+photon within detector. This implies events should contain both missing (transverse) energy two energetic photons. Therefore, one can search simply through inclusive production superpartners. exclusion reach...
Generic Fortran common blocks are presented for use by High Energy Physics event generators the transfer of configurations from parton level to showering and hadronization generators.
We have analyzed the single $\eegg + \slashchar{E}_T$ event at CDF and found that expected rate kinematics are consistent with selectron pair production. consider two classes of general low-energy supersymmetric theories, where either lightest neutralino (``neutralino LSP'' scenario) or gravitino (``light gravitino'' is particle. The parameter space Lagrangian tightly constrained by branching ratios for necessary decay chain selectron. identify a region satisfying all constraints,...
This document summarises the proposal of LHC Dark Matter Working Group on how to present results s-channel simplified dark matter models and compare them direct (indirect) detection experiments.
We extend the study of Higgs boson couplings in "golden" $gg\to H \to ZZ^\ast 4\ell$ channel two important respects. First, we demonstrate importance off-shell production ($gg\to H^\ast ZZ 4\ell$) determining which operators contribute to $HZZ$ vertex. Second, include five lowest non-trivial dimension, including $Z_\mu Z^\mu \Box H$ and $H Z_\mu Z^\mu$ that are often neglected. point out former operator can be severely constrained by measurement $H^\ast ZZ$ rate and/or unitarity...
In this work, we consider the case of a strongly coupled dark/hidden sector, which extends Standard Model (SM) by adding an additional non-Abelian gauge group. These extensions generally contain matter fields, much like SM quarks, and fields similar to gluons. We focus on exploration such sectors where dark particles are produced at LHC through portal undergo rapid hadronization within sector before decaying back, least in part potentially with sizeable lifetimes, particles, giving range...
This work reports on a method for uncertainty estimation in simulated collider-event predictions. The is based Monte Carlo-veto algorithm, and extends previous estimates parton showers by including the Lund string-fragmentation model. advantageous from perspective of simulation costs: single ensemble generated events can be reinterpreted as though it was obtained using different set input parameters, where each event now accompanied with corresponding weight. allows robust exploration...
We introduce a model of hadronization based on invertible neural networks that faithfully reproduces simplified version the Lund string for meson hadronization. Additionally, we new training method normalizing flows, termed MAGIC, improves agreement between simulated and experimental distributions high-level (macroscopic) observables by adjusting single-emission (microscopic) dynamics. Our results constitute an important step toward realizing machine-learning utilizes data during training....