A5015118367- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Nuclear physics research studies
- High-Energy Particle Collisions Research
- Advanced NMR Techniques and Applications
- Atomic and Molecular Physics
- Quantum, superfluid, helium dynamics
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- High-pressure geophysics and materials
- Nuclear Physics and Applications
- Advanced Chemical Physics Studies
- Astro and Planetary Science
- Quantum chaos and dynamical systems
- Geophysics and Gravity Measurements
- Physics of Superconductivity and Magnetism
- Particle accelerators and beam dynamics
- Nuclear reactor physics and engineering
- Scientific Research and Discoveries
- Acoustic Wave Resonator Technologies
- Nuclear Issues and Defense
- Electron Spin Resonance Studies
Laboratoire de Physique Nucléaire et de Hautes Énergies
2010-2024
University of Geneva
2024
Sorbonne Université
2010-2021
Centre National de la Recherche Scientifique
2010-2021
Université Paris Cité
2009-2020
Sorbonne Paris Cité
2014-2020
Délégation Paris 7
2000-2014
Institut National de Physique Nucléaire et de Physique des Particules
1976-2012
Laboratoire de Physique Théorique
1987-2012
Institut de Physique
1988-2010
In view of practical nuclear structure calculations the Paris $N\ensuremath{-}N$ potential is parametrized in a simple analytical form. This parametrization consists regularized discrete superposition Yukawa-type terms. Results for phase shifts and deuteron parameters are presented as well matter binding energy obtained with this potential.NUCLEAR REACTIONS Nucleon-nucleon interaction, potential. 0 to 330 MeV shifts.
A model has been constructed for nucleon-antinucleon annihilation which is of short range but state (energy, spin, isospin,...) dependent as dictated by the calculation diagrams. This fulfills general theoretical requirements and, at same time, provides a good fit presently available $p\overline{p}$ experimental data, better than existing models are independent effectively long ranged. The present results contradict generally accepted claim that fitting data requires an effective long-ranged...
The two-pion exchange contributions to nucleon-nucleon forces are calculated from our knowledge of pion-nucleon phase shifts and pion-pion interaction which used as input into dispersion relations with the subtractions required by Regge asymptotic behavior. At low energies, potentials derived, which, addition $\ensuremath{\pi}$-meson $\ensuremath{\omega}$-meson exchange, explain many features phenomenological without any adjustable parameter. However, spin-orbit central have significant...
We study $CP$ violation and the contribution of strong kaon-pion interactions in three-body $B\ensuremath{\rightarrow}K{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ decays. extend our recent work on effect two-pion $S$- $P$-wave to that corresponding ones. The weak amplitudes have a first term derived QCD factorization second one as phenomenological added penguin amplitudes. effective coefficients include leading order contributions plus next-to-leading vertex penguins...
A nucleon-nucleon potential is constructed which possesses fundamental theoretical long- and medium-range parts. The short-range part determined phenomenologically by fitting the phase parameters as well deuteron properties. Although number of free small (six in each isospin state) quality fit very good.
We critically evaluate the isovector Goldberger-Miyazawa-Oehme (GMO) sum rule for forward $\ensuremath{\pi}N$ scattering using recent precision measurements of ${\ensuremath{\pi}}^{\ensuremath{-}}p$ and ${\ensuremath{\pi}}^{\ensuremath{-}}d$ lengths from pionic atoms. deduce charged-pion-nucleon coupling constant, with careful attention to systematic statistical uncertainties. This determination gives, directly data,...
We report on an updated Paris $N\overline{N}$ optical potential. The long- and intermediate-range real parts are obtained by $G$-parity transformation of the $\mathit{NN}$ potential based a theoretical dispersion-relation treatment correlated uncorrelated two-pion exchange. short-range imaginary parametrization results from calculation annihilation box diagram into two mesons with nucleon-antinucleon intermediate state in crossed channel. parametrized short range determined fitting not only...
The recent measurements by the BES Collaboration of J/psi decays into a photon and proton-antiproton pair indicate strong enhancement at threshold not observed in neutral pion pair. Is this due to quasi-bound state or baryonium? A natural explanation follows from traditional model interactions based on G-parity transformation. structure is attraction 1S0 state, possibly near-threshold 11S0 wave.
We study the contribution of strong interactions between two pions in $S$ and $P$ waves to weak $B\ensuremath{\rightarrow}\ensuremath{\pi}\ensuremath{\pi}K$ decay amplitudes. The interference these is analyzed $\ensuremath{\pi}\ensuremath{\pi}$ effective-mass range $\ensuremath{\rho}(770{)}^{0}$ ${f}_{0}(980)$ resonances. use a unitary $\overline{K}K$ coupled-channel model describe $S$-wave Breit-Wigner function for $P$-wave amplitude. $B$-decay amplitudes, obtained from QCD factorization,...
B decays into pion K and anti-K K, where the pion-pion pairs interact in isospin zero S-wave, are studied effective mass range from threshold to 1.2 GeV. The interplay of strong weak decay amplitudes is analyzed using an unitary coupled channel model. Final state interactions described terms four scalar form factors constrained by unitarity chiral perturbation theory. Branching ratios for f0(980)K, calculated factorization approximation with some QCD corrections, too low as compared recent...
A chiral-invariant effective Lagrangean is constructed from pions and the low-mass measons. Soliton solutions of this are investigated. These used to predict properties baryons. The agreement with experiment quite satisfactory in spite very limited freedom choice parameter values. This gives strong support idea that qualitatively even semiquantitatively baryon physics can be deduced meson via solitons.
A phenomenological analysis of the scalar meson ${f}_{0}(980)$ is performed that relies on quasi-two-body decays $D$ and ${D}_{s}\ensuremath{\rightarrow}{f}_{0}(980)P$, with $P=\ensuremath{\pi}$, $K$. The two-body branching ratios are deduced from experimental data or ${D}_{s}\ensuremath{\rightarrow}\ensuremath{\pi}\ensuremath{\pi}\ensuremath{\pi}$, $\overline{K}K\ensuremath{\pi}$ ${f}_{0}(980)\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$...
Predictions of the Paris potential for analyzing power in $\mathrm{pp}$ scattering at low energies are compared with recent high-precision measurements 6.141 MeV and earlier 10 16 MeV. Phase-shift values also presented discussed view previous analyses.
We study CP violation and the contribution of strong pion-pion interactions in three-body B ± → π ∓ decays within a quasi twobody QCD factorization approach.The short distance interaction amplitude is calculated next-to-leading order coupling constant with vertex penguin corrections.The meson-meson final state are described by pion non-strange scalar vector form factors for S P waves relativistic Breit-Wigner formula D wave.The factor from unitary coupled-channel model including ππ, K...
We introduce parametrizations of hadronic three-body $B$ and $D$ weak decay amplitudes that can be readily implemented in experimental analyses are a sound alternative to the simplistic widely used sum Breit-Wigner type amplitudes, also known as isobar model. These particularly useful interpretation CP asymmetries Dalitz plots. They derived from previous calculations based on quasi-two-body factorization approach which two-body final state interactions fully taken into account terms unitary...
The differential $\mathrm{np}$ scattering cross section has been measured at 162 MeV in the angular range ${\ensuremath{\theta}}_{\mathrm{c}.\mathrm{m}.}=72\ifmmode^\circ\else\textdegree\fi{}\ensuremath{-}180\ifmmode^\circ\else\textdegree\fi{}$, using neutron beam facility Svedberg Laboratory Uppsala. Special attention was paid to absolute normalization of data. In $150\ifmmode^\circ\else\textdegree\fi{}\ensuremath{-}180\ifmmode^\circ\else\textdegree\fi{}$, data are steeper than those most...