A5083000295- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Neutrino Physics Research
- Particle Detector Development and Performance
- Superconducting Materials and Applications
- Dark Matter and Cosmic Phenomena
- Distributed and Parallel Computing Systems
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Spacecraft and Cryogenic Technologies
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Crystallography and Radiation Phenomena
- Orbital Angular Momentum in Optics
- Particle accelerators and beam dynamics
- Quantum Mechanics and Applications
- Advanced X-ray Imaging Techniques
- Advanced Data Storage Technologies
- Computational Physics and Python Applications
- Quantum Information and Cryptography
- Hydrocarbon exploration and reservoir analysis
- Radiation Detection and Scintillator Technologies
- Astronomical Observations and Instrumentation
Institut National de Physique Nucléaire et de Physique des Particules
2015-2024
Centre National de la Recherche Scientifique
2015-2024
Université Grenoble Alpes
2015-2024
Laboratoire de Physique Subatomique et de Cosmologie
2015-2024
Southern Methodist University
2006-2022
Fermi National Accelerator Laboratory
2011-2022
University of Jyväskylä
2022
Helsinki Institute of Physics
2022
Institute of Nuclear Physics, Polish Academy of Sciences
2018-2022
University of Helsinki
2022
This paper describes the physics case for a new fixed target facility at CERN SPS. The SHiP (Search Hidden Particles) experiment is intended to hunt in largely unexplored domain of very weakly interacting particles with masses below Fermi scale, inaccessible LHC experiments, and study tau neutrino physics. same proton beam setup can be used later look decays tau-leptons lepton flavour number non-conservation, $\tau\to 3\mu$ search weakly-interacting sub-GeV dark matter candidates. We discuss...
We present the new nCTEQ15 set of nuclear parton distribution functions with uncertainties. This fit extends CTEQ proton PDFs to include dependence using data on nuclei all way up 208^Pb. The uncertainties are determined Hessian method an optimal rescaling eigenvectors accurately represent for chosen tolerance criteria. In addition Deep Inelastic Scattering (DIS) and Drell-Yan (DY) processes, we also inclusive pion production from RHIC help constrain gluon PDF. Furthermore, investigate...
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...
We perform a global chi^2-analysis of nuclear parton distribution functions using data from charged current neutrino-nucleus deep-inelastic scattering (DIS), charged-lepton-nucleus DIS, and the Drell-Yan (DY) process. show that corrections in nu-A DIS are not compatible with predictions derived l^+A DY data. quantify this result hypothesis-testing criterion based on chi^2 which we apply to total as well individual sets. find it is possible accommodate by an acceptable combined fit. Our has...
The impact of recent measurements heavy-flavour production in deep inelastic ep scattering and pp collisions on parton distribution functions is studied a QCD analysis the fixed-flavour number scheme at next-to-leading order. Differential cross sections charm- beauty-hadron measured by LHCb are used together with inclusive HERA. data experiment impose additional constraints gluon sea-quark distributions low partonic fractions x proton momentum, down to $$x \sim 5 \times 10^{-6}$$ . This...
We calculate the next-to-leading-order cross section for inclusive production of ${D}^{*\ifmmode\pm\else\textpm\fi{}}$ mesons in $p\overline{p}$ collisions as a function transverse momentum and rapidity two approaches using massive or massless charm quarks. For section, we derive limit from theory. find that this differs genuine version with $\overline{\mathrm{M}\mathrm{S}}$ (minimal-subtraction) factorization by finite corrections. By adjusting subtraction terms, establish theory which...
We perform a ${\ensuremath{\chi}}^{2}$ analysis of nuclear parton distribution functions (NPDFs) using neutral current charged-lepton (${\ensuremath{\ell}}^{\ifmmode\pm\else\textpm\fi{}}A$) deeply inelastic scattering (DIS), and Drell-Yan data for several targets. The $A$ dependence the NPDFs is extracted in next-to-leading order fit. compare corrections factors (${F}_{2}^{Fe}/{F}_{2}^{D}$) this with other results from literature. In particular, we contrast fits based upon DIS those...
We calculate the transverse-momentum (${p}_{T}$) distribution for inclusive hadroproduction of $B$ mesons at intermediate values ${p}_{T}$ next-to-leading order (NLO) in a dedicated finite-mass scheme using realistic nonperturbative fragmentation functions that are obtained through global fit to ${e}^{+}{e}^{\ensuremath{-}}$ data from CERN LEP1 and SLAC SLC exploiting their universality scaling violations. find effects moderately enhance cross section, by about 20% ${p}_{T}=2{m}_{b}$,...
We study nuclear effects in charged current deep inelastic neutrino-iron scattering the framework of a ${\ensuremath{\chi}}^{2}$ analysis parton distribution functions (PDFs). extract set iron PDFs and show that under reasonable assumptions it is possible to constrain valence, light sea, strange quark distributions. Our are used compute ${x}_{Bj}$-dependent ${Q}^{2}$-dependent correction factors for structure which required global analyses free nucleon PDFs. compare our results with from...
The 2011 Les Houches workshop was the first to confront LHC data. In two years since previous there have been significant advances in both soft and hard QCD, particularly areas of multi-leg NLO calculations, inclusion those calculations into parton shower Monte Carlos, tuning non-perturbative parameters Carlos. These proceedings describe theoretical that taken place, impact early data, for future development.
We study the inclusive hadroproduction of D0, D+, D*+, and D(s)+ mesons at next-to-leading order in parton model quantum chromodynamics endowed with universal nonperturbative fragmentation functions fitted to e+e- annihilation data from CERN LEP1. Working general-mass variable-flavor-number scheme, we resum large logarithms through evolution and, same time, retain full dependence on charm-quark mass without additional theoretical assumptions. In this way, cross section distributions...
We provide a comprehensive comparison of $$W^\pm / Z$$ vector boson production data in pPb and PbPb collisions at the LHC with predictions obtained using nCTEQ15 PDFs. identify measurements which have largest potential impact on PDFs, estimate effect including these Bayesian reweighting method. find this set can information as regards both nuclear corrections heavy flavor (strange quark) PDF components. As for proton, parton determination/separation is dependent (from target DIS, example),...
We revisit the renormalisation group equations (RGE) for general renormalisable gauge theories at one- and two-loop accuracy. identify correct various mistakes in literature β-functions of dimensionful Lagrangian parameters (the fermion mass, bilinear trilinear scalar couplings) as well dimensionless quartic couplings. There are two sources these discrepancies. Firstly, known expressions couplings assume a diagonal wave-function which is not appropriate models with mixing sector. Secondly,...
We study inclusive ${\mathrm{\ensuremath{\Lambda}}}_{c}^{\ifmmode\pm\else\textpm\fi{}}$-baryon production in $pp$ collisions the general-mass variable-flavor-number scheme and compare with data from LHCb, ALICE, CMS collaborations. perform a new fit of $c\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Lambda}}}_{c}^{+}$ fragmentation function combining ${e}^{+}{e}^{\ensuremath{-}}$ OPAL Belle. The agreement LHC is slightly worse compared calculation using an older function, tension between...
The extraction of the strange quark parton distribution function (PDF) poses a long-standing puzzle. Measurements from neutrino-nucleus deep inelastic scattering (DIS) experiments suggest is suppressed compared to light sea quarks, while recent studies W/Z boson production at LHC imply larger component small x values. As flavor determination in proton depends on nuclear corrections, e.g. heavy-target DIS, heavy ion measurements can provide distinct perspective help clarify this situation. In...