A5063517889- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Black Holes and Theoretical Physics
- Quantum, superfluid, helium dynamics
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Geophysics and Gravity Measurements
- Aerodynamics and Acoustics in Jet Flows
- Image Processing and 3D Reconstruction
- Scientific Measurement and Uncertainty Evaluation
- Geophysical and Geoelectrical Methods
- Gas Dynamics and Kinetic Theory
- Medical Imaging Techniques and Applications
- Physics of Superconductivity and Magnetism
- Quantum Mechanics and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Particle accelerators and beam dynamics
- Soil Moisture and Remote Sensing
- Plasma and Flow Control in Aerodynamics
- Neural Networks and Applications
- Acoustic Wave Resonator Technologies
- Radiopharmaceutical Chemistry and Applications
- Computational Fluid Dynamics and Aerodynamics
University of Turin
2022-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Pavia
2017-2023
Istituto Nazionale di Fisica Nucleare
2021-2023
Istituto Nazionale di Fisica Nucleare, Sezione di Torino
2022-2023
Thomas Jefferson National Accelerator Facility
2017-2022
University of Pavia
2017-2022
Institute for Physics
2022
Argonne National Laboratory
2019
Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari
2018
Hampton University
2018
We provide a concise overview on transverse momentum dependent (TMD) parton distribution functions, their application to topical issues in high-energy physics phenomenology, and theoretical connections with QCD resummation, evolution factorization theorems. illustrate the use of TMDs via examples multi-scale problems hadronic collisions. These include q_T spectra Higgs vector bosons for low q_T, azimuthal correlations production multiple jets associated heavy at large jet masses. discuss...
In this paper we consider the parametrizations of gluon transverse momentum dependent (TMD) correlators in terms TMD parton distribution functions (PDFs). These functions, referred to as TMDs, are defined Fourier transforms hadronic matrix elements nonlocal combinations fields. The nonlocality is bridged by gauge links, which have characteristic paths (future or past pointing), giving rise a process dependence that breaks universality. For gluons, specific correlator with one future and...
We present an extraction of unpolarized transverse-momentum-dependent parton distribution and fragmentation functions based on more than two thousands data points from several experiments for different processes: semi-inclusive deep-inelastic scattering Drell-Yan production lepton pairs. The baseline analysis is performed with a Monte Carlo replica method resumming large logarithms at N3LL accuracy. resulting description the very good ($\chi^2/N_{\rm dat} = 1.06$). For scattering,...
A bstract We present an extraction of unpolarized partonic transverse momentum distributions (TMDs) from a simultaneous fit available data measured in semi-inclusive deep-inelastic scattering, Drell-Yan and Z boson production. To connect at different scales, we use TMD evolution next-to-leading logarithmic accuracy. The analysis is restricted to the low-transverse-momentum region, with no matching fixed-order calculations high momentum. introduce specific choices deal low order 1 GeV 2 ....
Transverse-momentum-dependent distributions (TMDs) are extensions of collinear parton and important in high-energy physics from both theoretical phenomenological points view. In this manual we introduce the library [Formula: see text], a tool to collect transverse-momentum-dependent distribution functions (TMD PDFs) fragmentation FFs) together with an online plotting tool, TMDplotter. We provide description program components different physical frameworks user can access via available...
A common library, TMDlib2, for Transverse-Momentum-Dependent distributions (TMDs) and unintegrated parton (uPDFs) is described, which allows easy access of commonly used TMDs uPDFs, providing a three-dimensional (3D) picture the partonic structure hadrons. The tool TMDplotter web-based plotting implemented in together with collinear pdfs as available LHAPDF.
A bstract We present an extraction of the unpolarized transverse-momentum-dependent parton distribution and fragmentation functions that takes into account possible differences between quark flavors final-state hadrons. The is based on experimental measurements from Drell-Yan processes semi-inclusive deep-inelastic scattering, whose combination essential to distinguish flavor differences. analysis carried out at N 3 LL accuracy. extracted flavor-dependent distributions give a very good...
We propose a new fast method to match factorization theorems applicable in different kinematical regions, such as the transverse-momentum-dependent and collinear Quantum Chromodynamics. At variance with well-known approaches relying on their simple addition subsequent subtraction of double-counted contributions, ours simply builds weighting using theory uncertainties deduced from themselves. This allows us estimate unknown complete matched cross section an inverse-error-weighted average. The...
Within the framework of transverse-momentum-dependent factorization, we investigate for first time impact a flavor-dependent intrinsic transverse momentum quarks on production W± bosons in proton–proton collisions at s=7TeV. We estimate shift extracted value W boson mass MW induced by different choices parameters quark means template fit to transverse-mass and lepton transverse-momentum distributions W-decay products. obtain −6≤ΔMW+≤9MeV −4≤ΔMW−≤3 MeV with statistical uncertainty ±2.5 MeV....
The measurement of Single Transverse-Spin Asymmetries, $$A_N$$ , for various quarkonium states and Drell–Yan lepton pairs can shed light on the orbital angular momentum quarks gluons, a fundamental ingredient proton-spin puzzle. AFTER@LHC proposal combines unique kinematic coverage large luminosities thanks to Large Hadron Collider beams deliver precise measurements, complementary knowledge provided by collider experiments such as at RHIC. In this paper, we report sensitivity studies...
We calculate the transverse momentum dependence in production of two back-to-back hadrons electron-positron annihilations at medium/large energy scales Bes-III and Belle experiments. use parameters transverse-momentum-dependent (TMD) fragmentation functions that were recently extracted from semi-inclusive deep-inelastic-scattering multiplicities low Hermes. TMD evolution is applied according to different approaches using for nonperturbative part kernel, thus exploring sensitivity our results...
This volume is a collection of contributions for the 7-week program "Probing Nucleons and Nuclei in High Energy Collisions" that was held at Institute Nuclear Theory Seattle, WA, USA, from October 1 until November 16, 2018. The dedicated to physics Electron Ion Collider (EIC), world's first polarized electron-nucleon (ep) electron-nucleus (eA) collider be constructed USA. These proceedings are organized by chapters, corresponding weeks program: Week I, Generalized parton distributions; II,...
We investigate the predictive power of transverse-momentum-dependent (TMD) distributions as a function light-cone momentum fraction $x$ and hard scale $Q$ defined by process. apply saddle-point approximation to unpolarized quark gluon transverse evaluate position saddle point kinematics. determine quantitatively that for an distribution is maximal in large-$Q$ small-$x$ region. For cross sections TMD factorization formalism generally enhanced considering convolution two distributions, we...
In this contribution we present an overview of recent results concerning the impact a possible flavour dependence intrinsic quark transverse momentum on electroweak observables. particular, focus <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M2"><mml:mrow><mml:msub><mml:mrow><mml:mi>q</mml:mi></mml:mrow><mml:mrow><mml:mi>T</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math> spectrum gauge bosons produced in proton-proton collisions at LHC and direct determination...
We address the propagation and hadronization of a struck quark by studying gauge invariance color-averaged cut propagator, relating this to single inclusive fragmentation correlator means new sum rules. Using suitable Wilson lines, we provide gauge-invariant definition for mass dressed decompose into current an interaction-dependent component. The latter, which argue is order parameter dynamical chiral symmetry breaking, also appears in rule twist-3 $\tilde{E}$ function, providing specific...
Abstract We investigate the properties and structure of recently discussed “fully inclusive jet correlator”, namely, gauge-invariant field correlator characterizing final state hadrons produced by a free quark as this propagates in vacuum. Working at operator level, we connect object to single-hadron fragmentation quark, exploit novel gauge invariant spectral decomposition technique derive complete set momentum sum rules for functions up twist-3 level; known results are recovered, new...
I report on our investigations into the impact of (un)polarized transverse momentum dependent parton distribution functions (TMD PDFs or TMDs) for gluons at hadron colliders, especially A Fixed Target Experiment LHC (AFTER@LHC). In context high energy proton-proton collisions, we look final states with low mass (e.g. $\eta_b$) in order to investigate nonperturbative part TMD PDFs. We study factorization theorem $q_T$ spectrum $\eta_b$ produced collisions relying effective field theory...
We compute the inclusive unpolarized dihadron production cross section in far from back-to-back region of ${e}^{+}{e}^{\ensuremath{-}}$ annihilation leading order pQCD using existing fragmentation function fits and standard collinear factorization, focusing on large transverse momentum where is comparable to hard scale (the center-of-mass energy). compare with transverse-momentum-dependent (TMD) function-based predictions intended for small aim testing expectation that two types calculation...
Recent data from semi-inclusive deep inelastic scattering collected by the HERMES collaboration allow for first time to discuss how transverse-momentum dependence of unpolarized distribution and fragmentation functions is affected flavor involved partons. A model built with flavor-dependent Gaussian distributions fits better than same flavor-independent model. The current analysis performed totally leptons off protons deuterons, detected pions in final state. There are convincing indications...
We review a number of ideas put forward in favour the use polarised target along with proposed idea fixed-target experiment using LHC beams -AFTER@LHC.A recent studies have shown that single transverse-spin asymmetries (STSAs) are large enough to be precisely measured region accessible AFTER@LHC, particular as regards Drell-Yan process well single-pion, isolated-photon and jet production.AFTER@LHC would also ideal experimental set-up measure gluon Sivers effect via original quarkonium STSA...
We review a number of ideas put forward in favour the use polarised target along with proposed idea fixed-target experiment using LHC beams -- AFTER@LHC. A recent studies have shown that single transverse-spin asymmetries (STSAs) are large enough to be precisely measured region accessible AFTER@LHC, particular as regards Drell-Yan process well single-pion, isolated-photon and jet production. AFTER@LHC would also ideal experimental set-up measure gluon Sivers effect via original quarkonium...