Nucleon Resonance Effects in $pp\to pp{\pi }^0$ near Threshold

Abstract

The role of the low lying nucleon resonances beyond the $\Delta (1232)$ in the reaction $pp\to pp{\pi }^0$ near threshold is shown to be numerically significant by a calculation, which takes into account the pion re-scattering contribution described by chiral perturbation theory and the short-range mechanisms that are implied by the nucleon-nucleon interaction model. The intermediate N(1440) (P${}_{11}$) resonance is excited by the short-range exchange mechanisms, while the N(1535) ($S_{11}$) and N(1520) ($D_{13}$) resonances are excited by $\eta$ and $\rho$ meson exchange, respectively. The $P_{11}$ increases the calculated cross section, whereas the $S_{11}$ and $D_{13}$ resonances decrease it. The calculation takes full account of the initial and final state interactions.

Revised accepted version

References in corpus (1)

• $\chi$PT Calculations with two-pion Loops for S-wave ${\pi }^0$ Production in pp Collision

Cited by in corpus (16)

• Quark-model study of few-baryon systems
• Meson production in nucleon--nucleon collisions close to the threshold
• Chiral Three-Nucleon Forces from p-wave Pion Production
• Towards a field theoretic understanding of NN->NNpi
• The Reaction $pp\to pp\eta$ and the eta-Nucleon and Nucleon-Nucleon Interactions
• Toy Model for Pion Production in Nucleon-Nucleon Collisions
• A meson-exchange model of the associated photoproduction of vector mesons and N*(1440) resonances
• Study of the reaction pp \to pp${\pi }^0$ within 10 MeV above the threshold
• Vector meson angular distributions in proton-proton collisions
• Nucleon-nucleon interaction: Central potential and pion production
• Microscopic $NN\to N{N}^{\ast }(1440)$ transition potential: Determination of $\pi N{N}^{\ast }(1440)$ and $\sigma N{N}^{\ast }(1440)$ coupling constants
• A unified approach to hadron phenomenology at zero and finite temperatures in a hard-wall AdS/QCD model
• Anisotropy in the pion angular distribution of the reaction pp -> pp pi0 at 400 MeV
• Pion re-scattering in pi0 production
• Pion re-scattering operator in the S-matrix approach
• Charged and neutral pion production in the S-matrix approach