A5050787710- 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
- Distributed and Parallel Computing Systems
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Advanced Data Storage Technologies
- Religion and Society Interactions
- Astrophysics and Cosmic Phenomena
- Particle accelerators and beam dynamics
- Catholicism and Religious Studies
- Radio Astronomy Observations and Technology
- Religious Freedom and Discrimination
- Neutrino Physics Research
- Chemical and Physical Properties of Materials
- Advanced Graph Neural Networks
- Adhesion, Friction, and Surface Interactions
- Semantic Web and Ontologies
- Superconducting Materials and Applications
- Scientific Computing and Data Management
- Religious Education and Schools
National Taiwan University
2010-2015
Fermi National Accelerator Laboratory
2011-2013
National Center for Theoretical Sciences
2010-2013
UCLouvain
2006-2010
Roma Tre University
2010
Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre
2010
University of Pittsburgh
2010
Stanford University
2008-2010
Menlo School
2007-2009
SLAC National Accelerator Laboratory
2007-2009
We discuss the theoretical bases that underpin automation of computations tree-level and next-to-leading order cross sections, their matching to parton shower simulations, merging matched samples differ by light-parton multiplicities. present a computer program, MadGraph5_aMC@NLO, capable handling all these -- parton-level fixed order, shower-matched, merged in unified framework whose defining features are flexibility, high level parallelisation, human intervention limited input physics...
MadGraph 5 is the new version of matrix element generator, written in Python programming language. It implements a number new, efficient algorithms that provide improved performance and functionality all aspects program. features user interface, several output formats including C++ process libraries for Pythia 8, full compatibility with FeynRules physics models implementation, allowing event generation any model can be form Lagrangian. builds on same philosophy as previous versions, its...
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.
Low-energy supersymmetry (SUSY) and several other theories that address the hierarchy problem predict pair-production at LHC of particles with standard model quantum numbers decay to jets, missing energy, possibly leptons. If an excess such events is seen in data, a theoretical framework which describe it will be essential constraining structure new physics. We propose basis four deliberately simplified models, each specified by only 2--3 masses 4--5 branching ratios, for use first...
We present a proposal for performing model-independent jets plus missing energy searches. Currently, these searches are optimized mSUGRA and consequently not sensitive to all kinematically accessible regions of parameter space. show that the reach can be broadened by setting limits on differential cross section as function total visible energy. These measurements only require knowledge relevant standard model backgrounds subsequently used limit any theoretical new physics. apply this...
This Report summarises the results of second year's activities 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 in last few years. first report Handbook Sections: 1. Inclusive Observables (CERN-2011-002) focuses on predictions (central values and errors) for total production cross sections branching ratios Standard Model its minimal supersymmetric extension, covering also related issues such as...
This is the summary and introduction to proceedings contributions for Les Houches 2009 "Tools Monte Carlo" working group.
The matrix element method has been extensively used for the analysis of top-quark and $W$-boson physics at Tevatron but in general without dedicated treatment initial-state QCD radiation. At LHC, increased center-of-mass energy leads to a significant increase amount radiation, which makes it mandatory carefully account its effects. We here present several methods inclusion radiation effects apply them mass determination presence multiple invisible particles final state. demonstrate...
Undisputedly, derivation of theoretical systematic uncertainties is an inseparable ingredient any robust analysis dealing with experimental data. However, it not uncommon, even for those analyses that use state the art methods and tools to suffer from insufficient statistics when comes simulated datasets used estimate uncertainties. This practically limits power, sometimes robustness analysis. In this paper, we present SysCalc, a code which able derive weights various important...
This chapter of the "Flavor in era LHC" workshop report discusses flavor-related issues production and decays heavy states at LHC high momentum transfer Q, both from experimental theoretical perspective. We review top quark physics, discuss flavor aspects several extensions standard model, such as supersymmetry, little Higgs models or with extra dimensions. includes discovery aspects, well measurement properties these states. also present publicly available computational tools related to this topic.
We determine the prospects for finding dark matter at Tevatron and LHC through production of exotic fourth-generation mirror quarks ${T}^{\ensuremath{'}}$ that decay ${T}^{\ensuremath{'}}\ensuremath{\rightarrow}tX$, where $X$ is matter. The resulting signal $t\overline{t}+{\mathrm{E\ensuremath{\llap{\not\;}}}}_{T}$ has not previously been considered in searches quarks, but there are both general specific motivations this signal, with slight modifications, analysis applies to any scenario...
The production of heavy particles at hadron colliders is associated with radiation additional quarks and gluons from incoming partons. They can have significant transverse momenta the initial state (ISR) jets complicate reconstruction new particle masses. Taking gluino pair decay Large Hadron Collider as an example, we develop a novel technique to reduce these effects, allowing for better masses through measurement kinematical end points.
We here present some recent developments of MadGraph/MadEvent since the latest published version, 4.0. These include: Jet matching with Pythia parton showers for both Standard Model and Beyond processes, decay chain functionality, width calculation simulation, process generation Grid, a package quarkonium amplitudes, Matrix Element weights experimental events, automatic dipole subtraction next‐to‐leading order calculations, Feynman rules model files from Lagrangian any New Physics model.
We present a collection of signatures for physics beyond the standard model that need to be explored at LHC. The are organized according experimental objects appear in final state, and particular number high pT leptons. Our report, which includes brief theoretical reviews as well original results, summarizes activities "New Physics'' working group "Physics TeV Colliders" workshop (Les Houches, France, 11-29 June, 2007).