A5068384989- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Dialysis and Renal Disease Management
- Superconducting Materials and Applications
- Central Venous Catheters and Hemodialysis
- Distributed and Parallel Computing Systems
- Computational Physics and Python Applications
- Nematode management and characterization studies
- Black Holes and Theoretical Physics
- Particle Detector Development and Performance
- Plant Disease Resistance and Genetics
- Cosmology and Gravitation Theories
- Vascular Procedures and Complications
- Plant Pathogens and Resistance
- Advanced Data Storage Technologies
- Scientific Computing and Data Management
- Fluid Dynamics and Turbulent Flows
- Cold Fusion and Nuclear Reactions
- Agronomic Practices and Intercropping Systems
- Healthcare Decision-Making and Restraints
- Medical Imaging Techniques and Applications
- Multiple Sclerosis Research Studies
- Rheumatoid Arthritis Research and Therapies
- Particle Accelerators and Free-Electron Lasers
University of Manchester
2014-2025
Visva-Bharati University
1977-2015
Institute of Nuclear and Particle Physics
2007-2013
University of Antwerp
2009
European Organization for Nuclear Research
2004
University of Alberta
1982-2002
University of Milan
2000
Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca
2000
London Health Sciences Centre
2000
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
1999
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...
A bstract We present first analytic, resummed calculations of the rates at which wide-spread jet substructure tools tag QCD jets. As well as considering trimming, pruning and mass-drop tagger, we introduce modified with improved analytical phenomenological behaviours. Most taggers have double logarithmic structures. The tagger is special in that it involves only single logarithms, free from a complex class terms known non-global logarithms. modification brings an ability to discriminate...
In this paper, we review recent theoretical progress and the latest experimental results in jet substructure from Tevatron LHC. We status of outlook for calculation simulation tools studying substructure. Following up on report Boost 2010 workshop, present a new set benchmark comparisons techniques, focusing variables grooming methods that are collectively known as 'top taggers'. To facilitate further exploration, have attempted to collect, harmonize publish software implementations these techniques.
This report of the BOOST2012 workshop presents results four working groups that studied key aspects jet substructure. We discuss potential first-principle QCD calculations to yield a precise description substructure jets and study accuracy state-of-the-art Monte Carlo tools. Limitations experiments' ability resolve are evaluated, with focus on impact additional (pile-up) proton collisions performance in future LHC operating scenarios. A final section summarizes lessons learnt from analyses...
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 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...
As hadron collider physics continues to push the boundaries of precision, it becomes increasingly important have methods for predicting properties jets across a broad range jet radius values R, and in particular small R. In this paper we resum all leading logarithmic terms, $\alpha_s^n \ln^n R$, limit wide variety observables. These include inclusive spectrum, vetoes Higgs substructure tools. Some quantities that consider are relevant also heavy-ion collisions. Furthermore, examine comment...
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...
Following on our earlier work leading-logarithmic (LLR) resummations for the properties of jets with a small radius, R, we here examine phenomenological considerations inclusive jet spectrum. We discuss how to match NLO predictions small-R resummation. As part study propose new, physically-inspired prescription fixed-order and their uncertainties. investigate R-dependent next-to-next-to-leading order (NNLO) corrections, which is found be substantial, comment implications scale choices in...
A bstract Jet calculus offers a unique mathematical technique to bridge the area of QCD resummation with Monte Carlo parton showers. With ultimate goal constructing next-to-next-to-leading logarithmic (NNLL) showers we study, using language generating functionals, collinear fragmentation final-state partons. In particular, focus on definition and calculation Sudakov form factor, which physically describes no-emission probability in an ordered branching process. We review recent results for...
This review examines the status of event-shape studies in e+e− annihilation and DIS. It includes discussions perturbative calculations, various approaches to modelling hadronization comparisons data.
We carry out simple analytical calculations and Monte Carlo studies to better understand the impact of QCD radiation on some well-known jet substructure methods for jets arising from decay boosted Higgs bosons. Understanding differences between taggers these signal assumes particular significance in situations where they perform similarly background jets. As an explicit example this we compare Y-splitter method more recently proposed Y-pruning technique. demonstrate how insight gain can be...
A bstract We use a direct QCD approach to carry out the next-to-next-to-leading logarithmic (NNLL) resummation for observables groomed with modified mass-drop tagger (Soft Drop β = 0). focus on which are additive given an arbitrary number of soft-collinear emissions. For this class observables, we arrange structure NNLL terms into two distinct categories. The first defines simplified inclusive tagger, whereby collinear is directly related ungroomed observables. second clustering correction...
In this article, we document version 0.1 of the PANSCALES code for parton shower simulations. With help a few examples, discuss basic usage code, including tests logarithmic accuracy showers. We expose some numerical techniques underlying and include description how users can implement their own showers within framework. Some simpler be performed in minutes on modern laptop. As an early step towards phenomenology, also outline aspects preliminary interface to PYTHIA 8.3, access its hard...
The HERA electron--proton collider has collected 100 pb$^{-1}$ of data since its start-up in 1992, and recently moved into a high-luminosity operation mode, with upgraded detectors, aiming to increase the total integrated luminosity per experiment more than 500 pb$^{-1}$. been machine excellence for study QCD structure proton. Large Hadron Collider (LHC), which will collide protons centre-of-mass energy 14 TeV, be completed at CERN 2007. main mission LHC is discover mechanisms electroweak...