A5000839716- 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
- Computational Physics and Python Applications
- Dark Matter and Cosmic Phenomena
- Superconducting Materials and Applications
- Cosmology and Gravitation Theories
- Particle Accelerators and Free-Electron Lasers
- Parallel Computing and Optimization Techniques
- Black Holes and Theoretical Physics
- Neutrino Physics Research
- Scientific Computing and Data Management
- Radiomics and Machine Learning in Medical Imaging
- Process Optimization and Integration
- Quality Function Deployment in Product Design
- Cardiomyopathy and Myosin Studies
- Advanced Data Storage Technologies
- Algorithms and Data Compression
- Advanced Manufacturing and Logistics Optimization
University of Milan
2021-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2020-2025
Laboratoire de Physique Théorique et Hautes Energies
2014-2021
National Institute for Subatomic Physics
2018-2021
Université Paris Cité
2014-2018
RWTH Aachen University
2018
Sorbonne Université
2014-2017
Centre National de la Recherche Scientifique
2014-2017
Université Sorbonne Nouvelle
2017
Aix-Marseille Université
2016
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...
This Report summarizes the results of first 10 months' activities LHC Higgs Cross Sections Working Group. The main goal working group was to present status-of-art on Physics at integrating all new that have appeared in last few years. is more than a mere collection proceedings general meetings. subgroups been different directions. An attempt has made from these complete and homogeneous form. subgroups' contributions correspondingly comprise parts Report. A significant amount work performed...
We present the total cross sections at next-to-next-to-leading order in strong coupling for Higgs boson production via weak-boson fusion. Our results are obtained structure function approach, which builds upon approximate, though very accurate, factorization of QCD corrections between two quark lines. The theoretical uncertainty on LHC from higher and parton distribution uncertainties estimated 2% level each a wide range masses.
We compute the contribution of order α 2 to cross section a top-antitop pair in association with at least one heavy Standard Model boson — Z, W ±, and Higgs by including all effects QCD, QED, weak origin working automated MadGraph5_aMC@NLO framework. This next-to-leading is then combined that 3 α, two dominant lowest-order ones, S 2, obtain phenomenological results relevant 8, 13, 100 TeV pp collider.
A bstract We introduce a framework, based on an effective field theory approach, that allows one to perform characterisation studies of the boson recently discovered at LHC, for all relevant channels and in consistent, systematic accurate way. The production decay such with various spin parity assignments can be simulated by means multi-parton, tree-level matrix elements next-to-leading order QCD calculations, both matched parton showers. Several sample applications are presented which show,...
We present the key features relevant to automated computation of all leading- and next-to-leading order contributions short-distance cross sections in a mixed-coupling expansion, with special emphasis on first subleading NLO term QCD+EW scenario, commonly referred as EW corrections. discuss, particular, FKS subtraction context expansion; extension processes that include final-state tagged particles, defined by means fragmentation functions; some properties complex mass scheme. combine paper...
We present predictions for the SM-Higgs-pair production channels of relevance at LHC: gluon–gluon fusion, VBF, and top-pair, W, Z single-top associated production. All these results are NLO accuracy in QCD, matched to parton showers by means [email protected] method; hence, they fully differential. With exception fusion process, which a special treatment is needed order improve upon infinite-top-mass limit, our obtained automatic way within publicly available framework. show that all...
In this work we present for the first time predictions top-quark pair differential distributions at LHC NNLO QCD accuracy and including EW corrections. For latter include not only contributions of ${\cal O}(\alpha_s^2 \alpha)$, but also those order O}(\alpha_s \alpha^2)$ O}( \alpha^3)$. Besides providing phenomenological all main with stable top quarks, study following issues. 1) The effect photon PDF on top-pair spectra: find it to be strongly dependent set used -- especially $p_T$...
Abstract We present an update of the Universal FeynRules Output model format, commonly known as UFO that is used by several automated matrix-element generators and high-energy physics software. detail different features have been proposed extensions initial format during last ten years, collect them in current second version we coin Feynman format. Following philosophy UFO, they consist flexible modular additions to address particle decays, custom propagators, form factors, renormalisation...
We present a detailed study of Higgs boson production in association with single top quark at the LHC, next-to-leading order accuracy QCD. consider total and differential cross sections, parton level as well by matching short distance events to showers, for both t-channel s-channel production. provide predictions relevant LHC 13 TeV together thorough evaluation residual uncertainties coming from scale variation, distributions, strong coupling constant heavy masses. In addition, production,...
We present the calculation of next-to-leading contribution order $\alpha_S^2\alpha^2$ to production a Standard Model Higgs boson in association with top-quark pair at hadron colliders. All effects weak and QCD origin are included, whereas those QED ignored. work MadGraph5_aMC@NLO framework, discuss sample phenomenological applications 8, 13, 100 TeV $pp$ collider, including dominant corrections $\alpha_S^3\alpha$.
At the LHC CP properties of top-quark Yukawa interaction can be probed through Higgs production in gluon fusion or association with top quarks. We consider possibility for both CP-even and CP-odd couplings to quark present, study CP-sensitive observables at next-to-leading order (NLO) QCD, including parton-shower effects. show that inclusion NLO corrections sizeably reduces theoretical uncertainties, confirm di-jet correlations $$H+2$$ jet decay products $$t\bar{t}H$$ provide sensitive...
Weak vector boson fusion provides a unique channel to directly probe the mechanism of electroweak symmetry breaking at hadron colliders. We present method that allows calculate total cross sections next-to-next-to-leading order (NNLO) in QCD for an arbitrary V* -> X process, so-called structure function approach. By discussing case Higgs production detail, we estimate several classes previously neglected contributions and argue such is accurate precision level well above typical residual...
We study the charge asymmetry between $t$ and $\bar t$ quark at LHC, when they are produced in association with a $W$ boson. Though sizably reducing cross section respect to inclusive production, requiring boson final state has two important implications. First, leading order QCD, $t \bar t W^{\pm}$ production can only occur via $q q$ annihilation. As result, generated NLO QCD is significantly larger than that of which dominated by gluon fusion. Second, top quarks tend inherit polarization...
This report summarises the properties of Standard Model processes at 100 TeV pp collider. We document production rates and typical distributions for a number benchmark processes, discuss new dynamical phenomena arising highest energies available this intrinsic physics interest in measurement these as well their role backgrounds New Physics searches.
In this paper we study the production of a heavy charged Higgs boson in association with quarks at LHC two-Higgs-doublet model. We present for first time fully-differential results obtained four-flavour scheme NLO accuracy, both fixed order and including matching parton showers. Relevant differential distributions are studied two values mass thorough comparison is performed between predictions four- five-flavour schemes. show that agreement schemes improved by NLO(+PS) corrections...
This report summarises the properties of Standard Model processes at 100 TeV pp collider. We document production rates and typical distributions for a number benchmark processes, discuss new dynamical phenomena arising highest energies available this intrinsic physics interest in measurement these as well their role backgrounds New Physics searches.
A bstract We introduce P ine APPL, a library that produces fast-interpolation grids of physical cross sections, computed with general-purpose Monte Carlo generator, accurate to fixed order in the strong, electroweak, and combined strong-electroweak couplings. demonstrate this unique ability, distinguishes PineAPPL from similar software available literature, by interfacing it M ad G raph 5_ MC@NLO. compute grids, next-to-leading strong electroweak couplings, for representative set LHC...
Vector-boson fusion and associated production at the LHC can provide key information on strength structure of Higgs couplings to Standard Model particles. Using an effective field theory approach, we study effects next-to-leading order (NLO) QCD corrections matched parton shower selected observables for various spin-0 hypotheses. We find that inclusion NLO is needed reduce theoretical uncertainties total rates as well reliably predict shapes distributions. Our results are obtained in a fully...