Role of the N*(1440) resonance in the pp->pnpi+ reaction

Abstract

New measurement by CELSIUS-WASA Collaboration on the pp->pn pi+ reaction reveals clear evidence for the presence of the Roper resonance N*(1440) which has been ignored in previous theoretical calculations. In this article, based on an effective Lagrangian approach and available knowledge on the Roper resonance, we investigate the role of the Roper resonance for the pp->pn pi+ reaction. It is found that the contribution from the Roper resonance N*(1440) becomes significant for kinetic energy above 1.1 GeV, consistent with the new experimental observation. The t-channel sigma-meson exchange is dominant for the production of the Roper resonance.

13 pages, 4 figures

References in corpus (7)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• A coupled-channel analysis of $K\Lambda$ production in the nucleon resonance region
• New results on the Roper resonance and the P_{11} partial wave
• Towards a field theoretic understanding of NN->NNpi
• The role of $N^{\ast }(1535)$ in $pp\to pp\varphi$ and ${\pi }^{-}p\to n\varphi$ reactions
• The role of ${\Delta }^{++\ast }(1620)$ resonances in $pp\to n{K}^{+}{\Sigma }^{+}$ reaction and its important implications
• Evidence for a 'Narrow' Roper Resonance - the Breathing Mode of the Nucleon

Cited by in corpus (9)

• Dynamically generated $N^{\ast }$ and ${\Lambda }^{\ast }$ resonances in the hidden charm sector around 4.3 GeV
• Phenomenological analysis of the double pion production in nucleon-nucleon collisions up to 2.2 GeV
• Production of exotic hadrons in $pp$ and nuclear collisions
• Proposal for Studying $N^{\ast }$ Resonances with $\bar{p}p\to \bar{p}n{\pi }^{+}$ Reaction
• Phenomenological study on the $\bar{p}N\to \bar{N}N\pi \pi$ reactions
• Complementary studies on $N^{\ast }$ from $e^{+}{e}^{-}$, $pp$ and $p\bar{p}$ collisions
• Low-energy pion-pion scattering in the $pp\to pp{\pi }^{+}{\pi }^{-}$ and $p\bar{p}\to p\bar{p}{\pi }^{+}{\pi }^{-}$ reactions
• Non-Strange Meson Production with Hadronic Probes
• Strangeness production from pp collisions