A5050366176- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Pulsars and Gravitational Waves Research
- Physics of Superconductivity and Magnetism
- Advanced Data Storage Technologies
- Crystallography and Radiation Phenomena
- Advanced X-ray Imaging Techniques
- Nuclear physics research studies
- Scientific Research and Discoveries
- Distributed and Parallel Computing Systems
- Advanced Materials Characterization Techniques
- Cold Atom Physics and Bose-Einstein Condensates
- High-pressure geophysics and materials
- Advanced Graph Neural Networks
- Galaxies: Formation, Evolution, Phenomena
- Quantum and Classical Electrodynamics
- Twentieth Century Scientific Developments
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
2020-2025
Université Paris-Saclay
2015-2025
Centre National de la Recherche Scientifique
2015-2025
Warsaw University of Technology
2024
Institut National de Physique Nucléaire et de Physique des Particules
2012-2021
Institut de Physique
2012-2021
Université Paris-Sud
2005-2019
Centre de Gestion Scientifique
2019
European Organization for Nuclear Research
2016-2017
Council of Science Editors
2016
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...
We update the theoretical predictions for direct Upsilon(nS) hadroproduction in framework of nonrelativistic QCD. show that next-to-leading order corrections alpha(S) to color-singlet transition significantly raise differential cross section at high p(T) and substantially affect polarization Upsilon. Motivated by remaining gap between yield cross-section measurements Fermilab Tevatron, we evaluate leading part alpha(S)(5) contributions, namely, those coming from associated with three light...
We study the relevance of experimental data on heavy-flavor [${D}^{0}$, $J/\ensuremath{\psi}$, $B\ensuremath{\rightarrow}J/\ensuremath{\psi}$ and $\mathrm{\ensuremath{\Upsilon}}(1S)$ mesons] production in proton-lead collisions at LHC to improve our knowledge gluon-momentum distribution inside heavy nuclei. observe that nuclear effects encoded both most recent global fits parton densities next-to-leading order (nCTEQ15 EPPS16) provide a good overall description data. interpret this as hint...
The future opportunities for high-density QCD studies with ion and proton beams at the LHC are presented. Four major scientific goals identified: characterisation of macroscopic long wavelength Quark-Gluon Plasma (QGP) properties unprecedented precision, investigation microscopic parton dynamics underlying QGP properties, development a unified picture particle production from small (pp) to large (nucleus--nucleus) systems, exploration densities in nuclei broad ($x$, $Q^2$) kinematic range...
We demonstrate that the recent studies of J/ψ-pair production by CMS at LHC and D0 Tevatron reveal presence different mechanisms in kinematical regions. find out next-to-leading-order single parton scattering contributions αs5 dominate yield large transverse momenta pair. Our analysis further emphasises importance double scatterings – which are expected to J/ψ-rapidity differences invariant masses pair acceptance, thereby solve a discrepancy between theory data. In addition, we provide first...
We argue that the study of heavy quarkonia, in particular $\mathrm{\ensuremath{\Upsilon}}$, produced back to with an isolated photon $pp$ collisions at LHC is best---and currently unique---way access distribution both transverse momentum and polarization gluon unpolarized proton. These encode fundamental information on dynamics QCD. derive analytical expressions for various transverse-momentum distributions can be measured which allow a direct extraction aforementioned quantities. To assess...
We calculate the cross sections for direct hadroproduction of J/psi and Upsilon associated with a heavy-quark pair same flavour at leading order in alpha_S v NRQCD. These processes provide an interesting signature that could be studied Tevatron LHC also constitute gauge-invariant subset NLO corrections to inclusive Upsilon. find fragmentation approximation commonly used evaluate contribution these quarkonium production sizeably underestimates exact calculation kinematical region accessible...
We proceed for the first time to evaluation of Born cross section J / ψ + η(c) production, namely, via g → J/ψ+ g, and show that it has a harder P(T) spectrum than J/ψ-pair yield at level. If one stuck comparison level, would conclude production surpass large P(T). This is nonetheless not case since ψ-pair as single ψ, receives leading-P(T) contributions higher orders in α(s). also present these next-to-leading order contributions. These are indeed significant increasing essential relevance...
We propose a simple and model-independent procedure to account for the impact of nuclear modification gluon density as encoded in collinear PDF sets on two-to-two partonic hard processes proton-nucleus collisions. This applies good approximation quarkonium, D B meson production, generically referred H. Our consists parametrising square parton scattering amplitude, A_{gg -> H X} constraining it from proton-proton data. Doing so, we have been able compute corresponding factors J/psi, Upsilon...
We update our previous studies of nuclear-matter effects on J/Psi production in proton-nucleus for the recent LHC pPb runs at sqrt(s_NN)=5 TeV. have analysed modification gluon PDFs nucleus, using an exact kinematics a 2->2 process, namely g+g->J/Psi+g as expected from LO pQCD. This allows to constrain transverse-momentum while computing nuclear factor different rapidities, unlike with usual simplified kinematics. Owing absence measurement pp collisions same sqrt(s_NN) and owing significant...
The goal of this white paper is to give a comprehensive overview the rich field forward physics.We discuss occurrences BFKL re-summation effects in special final states, such as Mueller-Navelet jets, jet-gap-jets, and heavy quarkonium production.It further addresses TMD factorization at low x manifestation semi-hard saturation scale (generalized) PDFs.More theoretical aspects low-x physics, probes quark-gluon plasma, well possibility use photonhadron collisions LHC constrain hadronic...
We update the study of total $\ensuremath{\psi}$ and $\ensuremath{\Upsilon}$ production cross section in proton-proton collisions at RHIC energies using QCD-based color-singlet model, including next-to-leading order partonic matrix elements. also include charm-quark initiated processes which appear leading ${\ensuremath{\alpha}}_{s}$, so far overlooked such studies. Contrary to earlier claims, we show that yield is consistent with measurements over a broad range $J/\ensuremath{\psi}$...
Cold nuclear matter effects on J/psi production in proton-nucleus and nucleus-nucleus collisions are evaluated taking into account the specific kinematics at partonic level, shadowing of initial parton distributions absorption matter. We consider two different processes for c-cbar pair production: one with collinear gluons a recoiling gluon final state other carrying intrinsic transverse momentum. Our results compared to RHIC observables. The smaller values modification factor R_AA forward...
We show that the production of J/psi or Upsilon pairs in unpolarised pp collisions is currently best process to measure momentum-distribution linearly-polarised gluons inside protons through study azimuthal asymmetries. Not only short-distance coefficients for such reactions induce largest possible cos 4 phi modulations, but analysed data are already available. Among various final states previously studied within TMD factorisation approach, di-J/psi exhibits by far asymmetries, up 50% region...
We present predictions for double-quarkonium production in the kinematical region relevant proposed fixed-target experiment using LHC beams (dubbed as AFTER@LHC). These include all spin-triplet S -wave charmonium and bottomonium pairs, i.e. Psi(n_1S) + Psi(n_2S), Upsilon(m_1S) Upsilon(m_2S ) with n_1,n_2 = 1,2 m_1,m_2 1,2,3. calculate contributions from double-parton scatterings single-parton scatterings. With an integrated luminosity of 20 fb-1 to be collected at AFTER@LHC, we find that...