K. Hamilton
A5107340315- 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
- Black Holes and Theoretical Physics
- Neutrino Physics Research
- Particle Accelerators and Free-Electron Lasers
- Nuclear physics research studies
- Advanced Data Storage Technologies
- Cosmology and Gravitation Theories
- Superconducting Materials and Applications
- Algorithms and Data Compression
- Particle accelerators and beam dynamics
- Radiation Effects in Electronics
- Radiation Detection and Scintillator Technologies
- Diabetes Management and Education
- Nuclear Physics and Applications
- Electrical Fault Detection and Protection
- Health Policy Implementation Science
- Astro and Planetary Science
- World Wars: History, Literature, and Impact
- Belt Conveyor Systems Engineering
University College London
2016-2025
The Behaviouralist (United Kingdom)
2024
Migration Institute of Australia
2024
Thomas Jefferson National Accelerator Facility
2022
University of Glasgow
2018-2022
Virginia Tech
2022
European Organization for Nuclear Research
2007-2018
CEA Paris-Saclay
2017
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2017
University of California, Los Angeles
2017
In this paper we describe Herwig++ version 2.3, a general-purpose Monte Carlo event generator for the simulation of hard lepton-lepton, lepton-hadron and hadron-hadron collisions. A number important scattering processes are available, together with an interface via Les Houches Accord to specialized matrix element generators additional processes. The Beyond Standard Model (BSM) physics includes range models allows new be added by encoding Feynman rules model. parton-shower approach is used...
We present the report of hadronic working group BOOST2010 workshop held at University Oxford in June 2010. The first part contains a review potential decays highly boosted particles as an aid for discovery LHC and discussion status tools developed to meet challenge reconstructing isolating these topologies. In second part, we new results comparing performance jet grooming techniques top tagging algorithms on common set benchmark channels. also study sensitivity substructure observables...
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 an implementation of the next-to-leading order dijet production process in hadronic collisions framework POWHEG, which is a method to implement NLO calculations within shower Monte Carlo context. In constructing simulation, we have made use POWHEG BOX toolkit, makes light many most technical steps. The majority this article concerned with study predictions simulation. so doing, validate our program for experimental analyses, elaborating on some more subtle features arise from...
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.
Parton showers are among the most widely used tools in collider physics. Despite their key importance, none so far have been able to demonstrate accuracy beyond a basic level known as leading logarithmic order, with ensuing limitations across broad spectrum of physics applications. In this Letter, we propose criteria for be considered next-to-leading accurate. We then introduce new classes shower, final-state radiation, that satisfy main elements these large-N_{C} limit. As proof concept,...
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...
Inclusive Higgs boson production at large transverse momentum is induced by different channels. We focus on the leading through gluon fusion, and perform a consistent combination of state art calculations obtained in infinite-top-mass effective theory next-to-next-to-leading order (NNLO) full Standard Model (SM) next-to-leading (NLO). thus present approximate QCD predictions for this process NNLO, study corresponding perturbative uncertainties. This calculation then compared with those...
We report on a major milestone in the construction of logarithmically accurate final-state parton showers, achieving next-to-next-to-leading-logarithmic (NNLL) accuracy for wide class observables known as event shapes. The key to this advance lies identification relation between critical NNLL analytic resummation ingredients and their parton-shower counterparts. Our discussion is supplemented with numerical tests logarithmic three shower variants more than dozen distinct event-shape <a:math...
A bstract In the present work we consider assignment of factorization and renormalization scales in hadron collider processes with associated jet production, at next-to-leading order (NLO) perturbation theory. We propose a simple, definite prescription to this end, including Sudakov form factors consistently account for distinct kinematic occuring such collisions. The scheme yields results that are accurate NLO and, large class observables, it resums all orders logarithms arise from...
We detail a simulation of Higgs boson production via gluon fusion, accurate at next-to-next-to-leading order in the strong coupling, including matching to parton shower, yielding fully exclusive, hadron-level description final-state. The approach relies on POWHEG method for merging NLO plus jet cross-section with and MINLO simultaneously achieve accuracy inclusive production. NNLO is reached by reweighting procedure making use HNNLO program.
We include finite top- and bottom-mass effects in the next-to-next-to-leading order parton shower (NNLOPS) event generator for inclusive Higgs boson production gluon fusion based upon POWHEG+MiNLO approach. Since fixed-order results quark-mass only reach NLO accuracy, we add them to NNLOPS at that accuracy. explore uncertainties related unknown all-order logarithmic structure of by comparing assumption full exponentiation no all. Phenomenological showing quark-masses simulation are...
A bstract We consider the POWHEG generator for a H/W/Z boson plus one jet, augmented with recently proposed MiNLO method choice of scales and inclusion Sudakov form factors. Within this framework, covers all transverse- momentum region boson, i.e. no generation cuts are needed to obtain finite result. By construction, achieves NLO accuracy distributions involving (and relatively large) transverse boson. examine conditions under which also totally inclusive (e.g. rapidity distribution)...
We formulate some first fundamental elements of an approach for assessing the logarithmic accuracy parton-shower algorithms based on two broad criteria: their ability to reproduce singularity structure multi-parton matrix elements, and resummation results. illustrate our by considering properties transverse momentum ordered final-state showers, examining features up second order in strong coupling. In particular we identify regions where they fail known singular limits elements. The...
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 accuracy of parton-shower simulations is often a limiting factor in the interpretation data from high-energy colliders. We present first formulation parton showers with 1 order beyond state-of-the-art next-to-leading logarithms, for classes observables that are dominantly sensitive to low-energy (soft) emissions, specifically nonglobal and subjet multiplicities. This represents major step toward general next-to-next-to-leading logarithmic showers.
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.
Sustained engagement in type 1 diabetes self-management behaviours is a critical element achieving improvements glycated haemoglobin (HbA1c) and minimising risk of complications. Evaluations programmes, such as Dose Adjustment for Normal Eating (DAFNE), typically find that initial are rarely sustained beyond 12 months. This study identified involved self-management, their influences relationships to each other.A mixed-methods was conducted following the first two steps Behaviour Change Wheel...
We introduce a simple procedure that resolves the long-standing question of how to account for single-logarithmic spin-correlation effects in parton showers not just collinear limit, but also soft wide-angle at leading colour. discuss its implementation context PanScales family showers, where it complements our earlier treatment purely spin correlations. Comparisons fixed-order matrix elements help validate approach up third order strong coupling, and an appendix demonstrates small size...
A bstract We carry out extensive tests of the next-to-leading logarithmic (NLL) accuracy PanScales parton showers, as introduced recently for colour-singlet production in hadron collisions. The include comparisons to (semi-)analytic NLL calculations a wide range hadron-collider observables: boson transverse momentum distribution; global and non-global hadronic energy flow variables related jet vetoes analogues jettiness distributions; (sub)jet multiplicities; observables sensitive DGLAP...