A5101440056- 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
- Astrophysics and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Nuclear physics research studies
- Distributed and Parallel Computing Systems
- Cosmology and Gravitation Theories
- Particle accelerators and beam dynamics
- Quantum, superfluid, helium dynamics
- Black Holes and Theoretical Physics
- Medical Imaging Techniques and Applications
- Radiation Detection and Scintillator Technologies
Institut National de Physique Nucléaire et de Physique des Particules
2011-2024
Centre National de la Recherche Scientifique
2011-2024
Laboratoire de Physique Subatomique et de Cosmologie
2012-2024
Université Grenoble Alpes
2020-2024
Southern Methodist University
2009-2022
Université Joseph Fourier
2011-2012
Thomas Jefferson National Accelerator Facility
2011
Fermi Research Alliance
2011
Fermi National Accelerator Laboratory
2011
Karlsruhe Institute of Technology
2011
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 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...
We calculate the neutrino induced cross sections relevant for oscillation experiments, including $\ensuremath{\tau}$-lepton threshold quasielastic, resonance and deep-inelastic scattering. In addition to effects, we include nuclear corrections heavy targets which are moderate quasielastic large single pion production. The effects reactions small. present together with their various channels useful interpreting experimental results determining parameters of sector. Finally, event rates OPERA...
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 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...
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),...
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...
A clear understanding of nuclear parton distribution functions (nPDFs) plays a crucial role in the interpretation collider data taken at Relativistic Heavy Ion Collider, Large Hadron Collider (LHC), and near future Electron-Ion Collider. Even with recent inclusions vector boson light meson production data, uncertainty gluon PDF remains substantial limits heavy ion collision data. To obtain new constraints on PDF, we extend our $\mathrm{nCTEQ}15\mathrm{WZ}+\mathrm{SIH}$ analysis to inclusive...
With recent advances in the precision of inclusive lepton-nuclear scattering experiments, it has become apparent that comparable improvements are needed accuracy theoretical analysis tools.In particular, when extracting parton distribution functions large-x region, is crucial to correct data for effects associated with nonzero mass target.We present here a comprehensive review these target corrections (TMC) structure data, summarizing relevant formulas TMCs electromagnetic and weak...
A precise knowledge of nuclear parton distribution functions (nPDFs) is -- among other things important for the unambiguous interpretation hard process data taken in pA and AA collisions at Relativistic Heavy Ion Collider (RHIC) Large Hadron (LHC). The available fixed target deep inelastic scattering (DIS) Drell-Yan (DY) lepton pair production mainly constrain light quark distributions. It hence crucial to include more collider global analyses nPDFs order better pin down different flavors,...
We present a detailed phenomenological study of direct photon production in association with heavy-quark jet pA collisions at the Relativistic Heavy Ion Collider (RHIC) and Large Hadron (LHC) next-to-leading order QCD. The dominant contribution to cross-section comes from gluon--heavy-quark (gQ) initiated subprocess, making \gamma + Q process very sensitive both gluon parton distribution functions (PDFs). Additionally, RHIC LHC experiments are probing complementary kinematic regions momentum...
Global analyses of parton distribution functions (PDFs) have provided incisive constraints on the up and down quark components proton, but constraining other flavor degrees freedom is more challenging. Higher-order theory predictions new data sets contributed to recent improvements. Despite these efforts, strange function has a sizable uncertainty, particularly in small $x$ region. We examine from experiment theory, investigate impact this uncertainty LHC observables. In particular, we study...
We use the nCTEQ analysis framework to investigate nuclear parton distribution functions (nPDFs) in region of large $x$ and intermediate-to-low $Q$, with special attention recent JLab deep inelastic scattering data on targets. This lies a which is often excluded by $W$ $Q$ cuts global nPDF analyses. As we relax these cuts, enter new kinematic region, introduces phenomenology. In particular, study impact (i) target mass corrections, (ii) higher twist (iii) deuteron (iv) shape PDF...
In global analyses of nuclear parton distribution functions (nPDFs), neutrino deep-inelastic scattering (DIS) data have been argued to exhibit tensions with the from charged-lepton DIS. Using nCTEQ framework, we investigate these possible both internally and datasets used in our recent nPDF analysis nCTEQ15WZSIH. We take into account effects calculation deuteron structure function ${F}_{2}^{D}$ using CJ15 analysis. The resulting fit, nCTEQ15WZSIHdeut, serves as basis for comparison inclusive...
We introduce a Hybrid Variable Flavor Number Scheme for heavy flavors, denoted H-VFNS, which incorporates the advantages of both traditional (VFNS) as well Fixed (FFNS). By including an explicit $N_F$-dependence in Parton Distribution Functions (PDFs) and strong coupling constant $\alpha_S$, we generate coexisting sets PDFs $\alpha_S$ $N_F=\{3,4,5,6\}$ at any scale $\mu$, that are related analytically by $\overline{\text{MS}}$ matching conditions. The H-VFNS resums quark contributions...
We analyze the properties of ACOT scheme for heavy quark production and make use \MSbar massless results at NNLO N3LO structure functions F2 FL in neutral current deep-inelastic scattering to estimate higher order corrections. For this purpose we decouple mass entering phase space from one dynamics short distance cross section. show numerically that is generally more important. Therefore, dominant effects orders can be taken into account using Wilson coefficients together with an appropriate...
We extend the QCD Parton Model analysis using a factorized nuclear structure model incorporating individual nucleons and pairs of correlated nucleons. Our high-energy data from lepton deep-inelastic scattering, Drell-Yan, W Z boson production simultaneously extracts universal effective distribution quarks gluons inside nucleon pairs, their nucleus-specific fractions. Such successful extraction these distributions marks significant advance in our understanding properties connecting nucleon-...
Heavy quark parton distribution functions (PDFs) play an important role in several Standard Model and New Physics processes. Most analyses rely on the assumption that charm bottom PDFs are generated perturbatively by gluon splitting do not involve any non-perturbative degrees of freedom. It is clearly necessary to test this hypothesis with suitable QCD Conversely, a non-perturbative, intrinsic heavy has been predicted literature. We demonstrate very good approximation scale-evolution content...
We present the first official release of nCTEQ nuclear parton distribution functions with errors. The main addition to previous PDFs is introduction PDF uncertainties based on Hessian method. Another important inclusion pion production data from RHIC that give us a handle constraining gluon PDF. This contribution summarizes our results arXiv:1509.00792 and concentrates comparison other groups providing distributions.
We present theoretical predictions in the framework of ANP model for single pion production (${\ensuremath{\pi}}^{+},{\ensuremath{\pi}}^{0}$) ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ and ${\overline{\ensuremath{\nu}}}_{\ensuremath{\mu}}$ scattering off mineral oil plastic. Our results integrated cross sections flux-averaged differential distributions are compared to all available data MiniBooNE $\mathrm{MINER}\ensuremath{\nu}\mathrm{A}$ experiments. While our slightly undershoot data, they...