Massimiliano Grazzini
A5064424150- 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
- Superconducting Materials and Applications
- Neural Networks Stability and Synchronization
- Black Holes and Theoretical Physics
- Particle Accelerators and Free-Electron Lasers
- Cosmology and Gravitation Theories
- Dark Matter and Cosmic Phenomena
- stochastic dynamics and bifurcation
- Nonlinear Dynamics and Pattern Formation
- Scientific Computing and Data Management
- International Science and Diplomacy
- Neural Networks and Applications
- Advanced Memory and Neural Computing
- Gene Regulatory Network Analysis
- Numerical methods in engineering
- Neutrino Physics Research
- Magnetic confinement fusion research
- Neural dynamics and brain function
- Electromagnetic Scattering and Analysis
- Advanced Data Storage Technologies
University of Zurich
2016-2025
European Organization for Nuclear Research
1998-2018
Johannes Gutenberg University Mainz
2016
Deutsches Elektronen-Synchrotron DESY
2016
Laboratoire de Physique Théorique
2016
University of California, Los Angeles
2016
University of Siena
2005-2012
ETH Zurich
1999-2010
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
1995-2010
Istituto Nazionale di Fisica Nucleare
2004-2010
We consider higher-order QCD corrections to the production of colorless high-mass systems (lepton pairs, vector bosons, Higgs etc.) in hadron collisions. propose a new formulation subtraction method numerically compute arbitrary infrared-safe observables for this class processes. To cancel infrared divergences, we exploit universal behavior associated transverse-momentum (${q}_{T}$) distributions small-${q}_{T}$ region. The is illustrated general terms up next-to-next-to-leading order...
We consider QCD radiative corrections to the production of $W$ and $Z$ bosons in hadron collisions. present a fully exclusive calculation up next-to-next-to-leading order (NNLO) perturbation theory. To perform this NNLO computation, we use recently proposed version subtraction formalism. The includes $\ensuremath{\gamma}\mathrm{\text{\ensuremath{-}}}Z$ interference, finite-width effects, leptonic decay vector bosons, corresponding spin correlations. Our is implemented parton level Monte...
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...
The TESLA Technical Design Report Part III: Physics at an e+e- Linear Collider
We report on the first calculation of next-to-next-to-leading order (NNLO) QCD corrections to inclusive production ZZ pairs at hadron colliders. Numerical results are presented for pp collisions with centre-of-mass energy ($\sqrt{s}$) ranging from 7 14 TeV. The NNLO increase NLO result by an amount varying $11\%$ $17\%$ as $\sqrt{s}$ goes loop-induced gluon fusion contribution provides about $60\%$ total effect. When going scale uncertainties do not decrease and remain $\pm 3\%$ level.
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...
Charged gauge boson pair production at the Large Hadron Collider allows detailed probes of fundamental structure electroweak interactions. We present precise theoretical predictions for on-shell W+ W- that include, first time, QCD effects up to next leading order in perturbation theory. As compared order, inclusive cross section is enhanced by 9% 7 TeV and 12% 14 TeV. The residual perturbative uncertainty 3% level. severe contamination due top-quark resonances discussed detail. Comparing...
We report on the first fully differential calculation for W ± Z production in hadron collisions up to next-to-next-to-leading order (NNLO) QCD perturbation theory. Leptonic decays of and bosons are consistently taken into account, i.e. we include all resonant non-resonant diagrams that contribute process pp → ℓ ′± ν ′ + − +X both same-flavour (ℓ = ℓ) different-flavour ≠ channel. Fiducial cross sections distributions presented presence standard selection cuts applied experimental analyses by...
The successful operation of the Large Hadron Collider (LHC) and excellent performance ATLAS, CMS, LHCb ALICE detectors in Run-1 Run-2 with $pp$ collisions at center-of-mass energies 7, 8 13 TeV as well giant leap precision calculations modeling fundamental interactions hadron colliders have allowed an extraordinary breadth physics studies including measurements a variety processes. LHC results so far confirmed validity Standard Model particle up to unprecedented energy scales great sectors...
This paper presents a comprehensive review of both the theory and experimental successes Quantum Chromodynamics, starting with its emergence as well defined in 1972-73 following developments results up to present day. Topics include earliest theoretical foundations; fundamental constants QCD; an introductory discussion lattice QCD, only known method for obtaining exact predictions from methods approximating special focus on effective field theories; QCD under extreme conditions; measurements...
The associated production of a Higgs boson with top-antitop quark pair is crucial process at the LHC since it allows for direct measurement top-quark Yukawa coupling. We present computation radiative corrections to this next-to-next-to-leading order (NNLO) in QCD perturbation theory. This very first 2→3 massive colored particles perturbative order. develop soft approximation loop amplitudes, which enables us reliably quantify impact yet unknown two-loop contribution. At center-of-mass energy...
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...
We consider QCD radiative corrections to standard model Higgs-boson production in association with a W boson hadron collisions. present fully exclusive calculation up next-to-next-to-leading order (NNLO) perturbation theory. To perform this NNLO computation, we use recently proposed version of the subtraction formalism. Our includes finite-width effects, leptonic decay its spin correlations, and Higgs into bb pair. selected numerical results at Tevatron LHC.
Inclusive associated production of a light Higgs boson with one jet in $\mathrm{pp}$ collisions is studied next-to-leading order quantum chromodynamics. Transverse momentum and rapidity distributions the are calculated for LHC large top-quark mass limit. We find that $K$-factor this process $(\ensuremath{\approx}1.6)$. Our result supports previous suggestions channel $p+p\ensuremath{\rightarrow}H+\mathrm{jet}$ $\ensuremath{\rightarrow}\ensuremath{\gamma}+\ensuremath{\gamma}+\mathrm{jet}$...