A5054038429- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Distributed and Parallel Computing Systems
- Particle Detector Development and Performance
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Superconducting Materials and Applications
- Black Holes and Theoretical Physics
- Fluid Dynamics and Turbulent Flows
- Plasma and Flow Control in Aerodynamics
- Magnetic confinement fusion research
- Particle Accelerators and Free-Electron Lasers
- Computer Graphics and Visualization Techniques
- Dark Matter and Cosmic Phenomena
- Algorithms and Data Compression
- Combustion and flame dynamics
- Electromagnetic Scattering and Analysis
- Nuclear reactor physics and engineering
- Numerical Methods and Algorithms
- Scientific Measurement and Uncertainty Evaluation
- Advanced Measurement and Detection Methods
- Medical Imaging Techniques and Applications
- Atmospheric and Environmental Gas Dynamics
- Nuclear physics research studies
University of Sussex
2014-2024
Universidad Autónoma de Madrid
2013
Sorbonne Université
2013
Institut National de Physique Nucléaire et de Physique des Particules
2013
Centre National de la Recherche Scientifique
2013
Laboratoire de Physique Nucléaire et de Hautes Énergies
2013
ETH Zurich
2009-2012
University of Freiburg
2012
Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca
2001-2009
University of Milano-Bicocca
2001-2009
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 derive first next-to-next-to-leading logarithmic resummations for jet-veto efficiencies in Higgs and $Z$-boson production at hadron colliders. Matching with order results allows us to provide a range of phenomenological predictions the LHC, including cross-section results, detailed uncertainty estimates, comparisons current widely used tools.
We present results for matched distributions of a range dijet event shapes at hadron colliders, combining next-to-leading logarithmic (NLL) accuracy in the resummation exponent, next-to-next-to leading (NNLL) its expansion and order (NLO) pure alpha_s expansion. This is first time that such matching has been carried out hadronic final-state observables colliders. compare our to Monte Carlo predictions, with without multi-parton tree-level fixed-order calculations. These studies suggest...
A bstract Using the technology of caesar approach to resummation, we examine jet-veto efficiency in Higgs-boson and Drell-Yan production at hadron colliders show that next-to-leading logarithmic (NLL) accuracy resummation reduces just a Sudakov form factor. Matching with NNLO calculations results stable predictions for case production, but reveals substantial uncertainties gluon-fusion Higgs connected part poor behaviour perturbative series total cross section. We compare our those from...
We present a novel method for resummation of event shapes to next-to-next-to-leading-logarithmic (NNLL) accuracy. discuss the technique and describe its implementation in numerical program case e + − collisions where resummed prediction is matched NNLO. reproduce all existing predictions new results oblateness thrust major.
A bstract We study the impact of finite mass effects due to top and bottom loops in jet-veto distribution for Higgs production. discuss appearance non-factorizing logarithms region p t,veto ≳ m b . their numerical argue that these terms can be treated as a remainder. therefore detail our prescription resumming jet-vetoed cross section assessing its uncertainty presence effects. Resummation jet-veto, including effects, has been implemented public code JetVHeto.
A bstract We present a new event generator for the simulation of both neutral- and charged-current deep inelastic scattering (DIS) at next-to-leading order in QCD matched to parton showers using POWHEG method. Our implementation builds on existing BOX framework originally designed hadron-hadron collisions, supplemented by considerable extensions account genuinely different kinematics inherent lepton-hadron collisions. In particular, we momentum mappings that conserve special found DIS, which...
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...
In future measurements of the dilepton (Z/γ ∗) transverse momentum, Q T , at both Tevatron and LHC, achievable bin widths ultimate precision will be limited by experimental resolution rather than available event statistics. a recent paper variable which corresponds to component that is thrust axis, has been studied in this regard. region, < 30 GeV, shown less susceptible efficiency effects . Extending over all we now demonstrate dividing (or ) measured invariant mass further improves...
We present new results for the jet-veto efficiency and zero-jet cross section in Higgs production through gluon fusion. incorporate N$^3$LO corrections to total section, NNLO 1-jet rate, NNLL resummation jet $p_t$ LL radius dependence. Our include known finite-mass are obtained using method, updated relative earlier work take into account what has been learnt from precision calculations that we include. For 13 TeV collisions our default choice renormalisation factorisation scales,...
Fermionic top-partners arise in models such as Composite Higgs and Little Higgs. They modify properties, particular how the couples to top quarks. Alas, there is a low-energy cancellation acting coupling of boson gluons photons. As result this cancellation, no information about spectrum couplings can be obtained gg → h, just overall new physics scale f. In paper we show that not case when hard radiation taken into account. Indeed, differential distributions plus jets are sensitive...
A bstract Non-global logarithms arise from the sensitivity of collider observables to soft radiation in limited angular regions phase space. Their resummation next-to-leading logarithmic (NLL) order has been a long standing problem and its solution is relevant context precision all-order calculations wide variety processes observables. In this article, we consider sensitive only radiation, characterised by absence Sudakov double logarithms, derive set integro-differential equations that...
A bstract Non-global QCD observables are characterised by a sensitivity to the full angular distribution of soft radiation emitted coherently in hard scattering processes. This complexity poses challenge their all-order resummation, that was formulated at leading-logarithmic order about two decades ago. In this article we present solution long-standing problem resummation beyond order, and carry out first complete next-to-leading logarithmic calculation for non-global observables. is...
This document provides a writeup of all contributions to the workshop on "High precision measurements $α_s$: From LHC FCC-ee" held at CERN, Oct. 12--13, 2015. The explored in depth latest developments determination QCD coupling $α_s$ from 15 methods where high are (or will be) available. Those include low-energy observables: (i) lattice QCD, (ii) pion decay factor, (iii) quarkonia and (iv) $τ$ decays, (v) soft parton-to-hadron fragmentation functions, as well high-energy (vi) global fits...
A bstract We present a procedure to calculate the Sudakov radiator for generic recursive infrared and collinear (rIRC) safe observable whose distribution is characterised by two widely separated momentum scales. give closed formulae at next-to-next-to-leading-logarithmic (NNLL) accuracy, which completes general NNLL resummation this class of observables in ARES method processes with emitters Born level. As byproduct, we define physical coupling soft limit, provide an explicit expression its...