F. Sabatié
A5081176650- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Nuclear physics research studies
- Atomic and Subatomic Physics Research
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Quantum, superfluid, helium dynamics
- Advanced NMR Techniques and Applications
- Radiation Detection and Scintillator Technologies
- Superconducting Materials and Applications
- Medical Imaging Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Nuclear Physics and Applications
- Neutrino Physics Research
- Atomic and Molecular Physics
- Advanced Chemical Physics Studies
- Cold Atom Physics and Bose-Einstein Condensates
- Electron and X-Ray Spectroscopy Techniques
- Astronomical and nuclear sciences
- Quantum chaos and dynamical systems
- Particle accelerators and beam dynamics
- Inorganic Fluorides and Related Compounds
- Scientific Research and Discoveries
- Pulsars and Gravitational Waves Research
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2015-2024
CEA Paris-Saclay
2015-2024
Institut de Recherche sur les Lois Fondamentales de l'Univers
2015-2024
Université Paris-Saclay
2015-2024
Campbell Collaboration
2003-2023
Argonne National Laboratory
2006-2023
Duquesne University
2020-2023
Christopher Newport University
2013-2022
George Washington University
2022
University of York
2021
This White Paper presents the science case of an Electron-Ion Collider (EIC), focused on structure and interactions gluon-dominated matter, with intent to articulate it broader nuclear community. It was commissioned by managements Brookhaven National Laboratory (BNL) Thomas Jefferson Accelerator Facility (JLab) objective presenting a summary scientific opportunities goals EIC as follow-up 2007 NSAC Long Range plan. document is culmination community-wide effort in following series workshops...
This report is based on a ten-week program Gluons and the quark sea at high-energies, which took place Institute for Nuclear Theory (INT) in Seattle Fall 2010. The principal aim of was to develop sharpen science case an Electron-Ion Collider (EIC), facility that will be able collide electrons positrons with polarized protons light heavy nuclei high energies, offering unprecedented possibilities in-depth studies quantum chromodynamics (QCD). organized around following four major themes: (i)...
We report on a precision measurement of the neutron spin structure function ${g}_{1}^{n}$ using deep inelastic scattering polarized electrons by ${}^{3}\mathrm{He}$. For kinematic range $0.014<x<0.7$ and $1<{Q}^{2}<17(\mathrm{GeV}/c{)}^{2}$, we obtain $\ensuremath{\int}{0.014}^{0.7}{g}_{1}^{n}(x)dx\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}\ensuremath{-}0.036\ifmmode\pm\else\textpm\fi{}0.004(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.005(\mathrm{syst})$ at an average...
We have measured the parity-violating electroweak asymmetry in elastic scattering of polarized electrons from protons. Significant contributions to this could arise strange form factors nucleon. The is $A=\ensuremath{-}15.05\ifmmode\pm\else\textpm\fi{}0.98(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.56(\mathrm{syst})\phantom{\rule{0.3em}{0ex}}\mathrm{ppm}$ at kinematic point $⟨{\ensuremath{\theta}}_{\mathrm{lab}}⟩=12.3\ifmmode^\circ\else\textdegree\fi{}$ and...
This White Paper presents the science case of an Electron-Ion Collider (EIC), focused on structure and interactions gluon-dominated matter, with intent to articulate it broader nuclear community. It was commissioned by managements Brookhaven National Laboratory (BNL) Thomas Jefferson Accelerator Facility (JLab) objective presenting a summary scientific opportunities goals EIC as follow-up 2007 NSAC Long Range plan. document is culmination community-wide effort in following series workshops...
The beam-spin asymmetries in the hard exclusive electroproduction of photons on proton ($\stackrel{\ensuremath{\rightarrow}}{e}p\ensuremath{\rightarrow}ep\ensuremath{\gamma}$) were measured over a wide kinematic range and with high statistical accuracy. These result from interference Bethe-Heitler process deeply virtual Compton scattering. Over whole (${x}_{B}$ 0.11 to 0.58, ${Q}^{2}$ 1 $4.8\text{ }\text{ }{\mathrm{GeV}}^{2}$, $\ensuremath{-}t$ 0.09 $1.8\text{ }{\mathrm{GeV}}^{2}$),...
We present the first measurements of $\stackrel{\ensuremath{\rightarrow}}{e}p\ensuremath{\rightarrow}ep\ensuremath{\gamma}$ cross section in deeply virtual Compton scattering (DVCS) regime and valence quark region. The ${Q}^{2}$ dependence (from 1.5 to $2.3\text{ }\text{ }{\mathrm{GeV}}^{2}$) helicity-dependent indicates twist-2 dominance DVCS, proving that generalized parton distributions (GPDs) are accessible experiment at moderate ${Q}^{2}$. helicity-independent is also measured...
New measurements are reported on the deuteron spin structure function g_1^d. These results were obtained from deep inelastic scattering of 48.3 GeV electrons polarized deuterons in kinematic range 0.01 < x 0.9 and 1 Q^2 40 (GeV/c)^2. first high dose electron data using lithium deuteride (6Li2H) as target material. Extrapolations performed to obtain moments g_1^d, including Gamma_1^d, net quark polarization Delta Sigma.
We have measured the spin structure functions g2p and g2d virtual photon asymmetries A2p A2d over kinematic range 0.02⩽x⩽0.8 0.7⩽Q2⩽20GeV2 by scattering 29.1 32.3 GeV longitudinally polarized electrons from transversely NH3 6LiD targets. Our g2 approximately follows twist-2 Wandzura–Wilczek calculation. The twist-3 reduced matrix elements d2p d2n are less than two standard deviations zero. data inconsistent with Burkhardt–Cottingham sum rule if there is no pathological behavior as x→0....
The present experiment exploits the interference between Deeply Virtual Compton Scattering (DVCS) and Bethe-Heitler processes to extract imaginary part of DVCS amplitudes on neutron deuteron from helicity-dependent D$({\vec e},e'\gamma)X$ cross section measured at $Q^2$=1.9 GeV$^2$ $x_B$=0.36. We a linear combination generalized parton distributions (GPDs) particularly sensitive $E_q$, least constrained GPD. A model dependent constraint contribution up down quarks nucleon spin is deduced.
Differential cross sections for the reaction $\gamma p \to n \pi^+$ have been measured with CEBAF Large Acceptance Spectrometer (CLAS) and a tagged photon beam energies from 0.725 to 2.875 GeV. Where available, results obtained here compare well previously published reaction. Agreement SAID MAID analyses is found below 1 The present set of has incorporated into database, exploratory fits made up 2.7 Resonance couplings extracted compared previous determinations. With addition these world...
We present final results on the photon electroproduction ($\vec{e}p\rightarrow ep\gamma$) cross section in deeply virtual Compton scattering (DVCS) regime and valence quark region from Jefferson Lab experiment E00-110. Results an analysis of a subset these data were published before, but has been improved which is described here at length, together with details experimental setup. Furthermore, additional have analyzed resulting sections new kinematic settings, for total 588 bins. $Q^2$-...
We describe the architecture and functionalities of a C++ software framework, coined PARTONS, dedicated to phenomenology Generalized Parton Distributions. These distributions three-dimensional structure hadrons in terms quarks gluons, can be accessed deeply exclusive lepto- or photo-production mesons photons. PARTONS provides necessary bridge between models Distributions experimental data collected various production channels. outline specification framework practical needs, physical content...
In order to learn effectively from measurements of generalised parton distributions (GPDs), it is desirable compute them using a framework that can potentially connect empirical information with basic features the Standard Model. We sketch an approach such computations, based upon rainbow-ladder (RL) truncation QCD's Dyson-Schwinger equations and exemplified via pion's valence dressed-quark GPD, $H_\pi^{\rm v}(x,\xi,t)$. Our analysis focuses primarily on $\xi=0$, although we also capitalise...
We study timelike and spacelike virtual Compton scattering in the generalized Bjorken scaling regime at next-to-leading order strong coupling constant, medium energy range which will be studied intensely JLab12 COMPASS-II experiment CERN. show that Born amplitudes get sizeable $O({\ensuremath{\alpha}}_{s})$ corrections and, even moderate energies, gluonic contributions are by no means negligible. stress cases complementary their difference deserves much special attention.
We have measured the proton recoil polarization in $^{4}\mathrm{H}\mathrm{e}(\stackrel{\ensuremath{\rightarrow}}{e}\text{ },{e}^{\ensuremath{'}}\stackrel{\ensuremath{\rightarrow}}{p})^{4}\mathrm{H}$ reaction at ${Q}^{2}=0.5$, 1.0, 1.6, and $2.6\text{ }(\mathrm{G}\mathrm{e}\mathrm{V}/c{)}^{2}$. The ratio of transfer coefficients differs from a fully relativistic calculation, favoring inclusion medium modification form factors predicted by quark-meson coupling model. In addition, induced...
We present deeply virtual ${\ensuremath{\pi}}^{0}$ electroproduction cross-section measurements at ${x}_{B}=0.36$ and three different ${Q}^{2}$ values ranging from 1.5 to $2\text{ }\text{ }{\mathrm{Ge}\mathrm{V}}^{2}$, obtained Jefferson Lab Hall A experiment E07-007. The Rosenbluth technique is used separate the longitudinal transverse responses. Results demonstrate that cross section dominated by its component and, thus, far asymptotic limit predicted perturbative quantum chromodynamics....
We have measured the spin structure functions g2p and g2d virtual photon asymmetries A2p A2d over kinematic range 0.02≤x≤0.8 1.0≤Q2≤30 (GeV/c)2 by scattering 38.8 GeV longitudinally polarized electrons from transversely NH3 6LiD targets. The absolute value of A2 is significantly smaller than R positivity limit range, while g2 consistent with twist-2 Wandzura-Wilczek calculation. obtain results for twist-3 reduced matrix elements d2p, d2d d2n. Burkhardt-Cottingham sum rule integral ∫g2(x)dx...
We present data on the inclusive scattering of polarized electrons from a 3He target at energies 0.862 to 5.06 GeV, obtained angle 15.5°. Our include measurements quasielastic peak, through nucleon resonance region, and beyond, were used determine virtual photon cross-section difference σ1/2−σ3/2. extract extended Gerasimov-Drell-Hearn integral for neutron in range four-momentum transfer squared Q2 0.1–0.9 GeV2.Received 15 May 2002DOI:https://doi.org/10.1103/PhysRevLett.89.242301©2002...
We have measured the spin structure functions $g_1$ and $g_2$ of $^3$He in a double-spin experiment by inclusively scattering polarized electrons at energies ranging from 0.862 to 5.07 GeV off target 15.5$^{\circ}$ angle. Excitation covered resonance onset deep inelastic regions. determined for first time $Q^2$ evolution $\Gamma_1(Q^2)=\int_0^{1} g_1(x,Q^2) dx$, $\Gamma_2(Q^2)=\int_0^1 g_2(x,Q^2) dx$ $d_2 (Q^2) = \int_0^1 x^2[ 2g_1(x,Q^2) + 3g_2(x,Q^2)] neutron range 0.1 GeV$^2$ $\leq Q^2...