B. Loiseau

Parametrization of the deuteron wave function of the Paris NN potential

Abstract We present a convenient analytical parametrization, in both configuration and momentum spaces, of the deuteron wave-function calculated with the Paris potential.

The Static Baryon Baryon Potential in the Skyrme Model

Abstract Methods for deriving a static baryon-baryon (nucleon-nucleon as well as nucleon-delta and transition) potential from the Skyrme model are briefly reported. Some results obtained with these methods are also presented and discussed.

Nuclear binding and the skyrme model

Abstract A serious shortcoming of the Skyrme model is that it appears to predict for the NN interaction no attraction at medium range. We show that the symmetric quartic term, in powers of derivatives of the meson fields, not considered in the original Skyrme model, provides attractive NN forces. We argue that incorporation of vector mesons, especially the ω meson, along with this new quartic term into the Skyrme model can lead to a realistic description of the NN interaction.

Spin effects in low energy proton-antiproton forward elastic scattering

Abstract Predictions of the pp forward elastic cross section and of the real to imaginary ratio ϱ given by the NN interaction we proposed recently are reported. Our cross sections compare very well with recent measurements at 400 p L c and 700 MeV/ c . It is also shown that spin effects cannot be neglected in the determination of ϱ as usually assumed.

Interference between f(0)(980) and rho(770)0 resonances in B ---> pi+ pi- K decays

We study the contribution of the strong interaction between the two pions in S- and P-waves to the weak B --> pion pion kaon decay amplitudes. The interference between these two waves is analyzed in the pion-pion effective mass range of the rho(770) and f0(980) resonances. We use a unitary pion-pion and antikaon-kaon coupled-channel model to describe the S-wave interactions and a Breit-Wigner function for the P-wave amplitude. The weak B-decay amplitudes, obtained from QCD factorization, are supplemented with charming penguin contributions in both waves. The four complex parameters of these long distance terms are determined by fitting the model to the BaBar and Belle data on B^{+,-,0} --> pi+ pi- K^{+,-,0} branching fractions, CP asymmetries, pion-pion effective mass and helicity-angle distributions. This set of data, and in particular the large direct CP-asymmetry for B^{+,-} --> rho0(770) K^{+,-} decays, is well reproduced. The interplay of charming penguin amplitudes and the interference of S- and P-waves describes rather successfully the experimental S and A values of the CP-violating asymmetry for both B0 --> f0(980) K0S and B0 --> rho0(770) K0S decays.

Modeling electromagnetic form factors of light and heavy pseudoscalar mesons

The electromagnetic form factors of light and heavy pseudoscalar mesons are calculated within two covariant constituent-quark models, viz., a light-front and a dispersion relation approach. We investigate the details and physical origins of the model dependence of various hadronic observables: the weak decay constant, the charge radius and the elastic electromagnetic form factor.

Effects of initial- and final-state interactions in the p̄p→ΛΛ reaction

Abstract The p p → Λ Λ observables are calculated using pp initial-state and Λ Λ final-state interactions based on the Paris NN potential, with the addition of a term simulating the 2K-exchange in the annihilation potential for the Λ Λ case. A satisfactory fit of the existing data is obtained. When the results are compared with earlier calculations, quantitative differences are found for all observables showing the importance of the initial- and final-state interaction effects.

Dalitz plot studies of

The presently available high-statistics data of the

D^0 \to K_S^0 \pi^+ \pi^-

{D}^{0}\ensuremath{\rightarrow}{K}_{S}^{0}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}

decays in a factorization approach

processes measured by the Belle and BABAR collaborations are analyzed within a quasi-two-body factorization framework. Starting from the weak effective Hamiltonian, tree and annihilation amplitudes build up the