Isocalar Roper excitation in the pp --> pp pi0 reaction close to threshold

Abstract

A new mechanism for the pp --> pp pi0 reaction close to threshold is suggested coming from the isoscalar excitation of the Roper and its decay into N(pi pi)S-wave, with one of the pi0 emitted and the other one reabsorbed on the second nucleon. The mechanism can lead to important interference with other mechanisms and, together with experiment, serves to exclude large ranges of the 2pi N* decay parameters allowed by the N* partial decay widths.

11 LaTeX pages, 4 postscript figures

References in corpus (4)

• Theoretical study of the N N --> N N pi pi reaction
• Role of the $\Delta$ isobar in the reaction $NN\to NN\pi$ near threshold
• Chiral Perturbation Theory and the pp -> pp pi0 Reaction Near Threshold
• The reactions $pp\to pp{\pi }^0$ and $pp\to d{\pi }^{+}$ at threshold: The role of the isoscalar $\pi N$ scattering amplitude

Cited by in corpus (6)

• Meson production in nucleon--nucleon collisions close to the threshold
• Phenomenological analysis of the double pion production in nucleon-nucleon collisions up to 2.2 GeV
• Proposal for Studying $N^{\ast }$ Resonances with $\bar{p}p\to \bar{p}n{\pi }^{+}$ Reaction
• The pi N -> pi pi N reaction around the N(1440) energy
• Role of the N*(1440) resonance in the pp->pnpi+ reaction
• Exclusive $f_1(1285)$ meson production for energy ranges available at the GSI-FAIR with HADES and PANDA