Delta excitation in antiproton-deuteron annihilation

Abstract

The ∆-excitation in pd annihilation at rest was studied. The annihilation amplitude from the statistical model and the πN amplitude from the resonance model were adopted in our calculations. We analyze the invariant mass of the π + p and π − p systems selecting the protons with momenta above 400 MeV/c and with respect to the different final reaction channels. Our model reproduces reasonably the experimental data.

Charmed meson rescattering in the reaction $$ \bar pd \uparrow \bar DDN $$

“…For instance, for multi-pion production frompd annihilation the presence of rescattering effects was demonstrated via the projection of the Dalitz plot on the invariant mass spectrum of the final πp system [32,62]. An analysis in form of a partial wave decomposition of the Dalitz plot was proposed [58, 59,60] for the pp→pK + Λ reaction, which finally allowed to study and separate [61] Fig.…”

“…A well-known method for the reconstruction of the reaction dynamics is the Dalitz plot analysis of the final state [33,58,59,60,61]. For instance, for multi-pion production from pd annihilation the presence of rescattering effects was demonstrated via the projection of the Dalitz plot on the invariant mass spectrum of the final πp system [32,62]. An analysis in form of a partial wave decomposition of the Dalitz plot was proposed [58, 59,60] for the pp→pK + Λ reaction, which finally allowed to study and separate [61] non-resonant and resonant contributions in the K + Λ subsystem.…”

Heavy meson production in proton-nucleus reactions with empirical spectral functions

“…We note that the on-shell elementary π-meson production e.g. can be described within the isobar model [39,40]. The factor g π in Eq.…”