Polarization phenomena in the reaction NN to NNpi near threshold

Abstract

First calculations for spin-dependent observables of the reactions $pp\to pp{\pi }^0$, $pp\to pn{\pi }^{+}$ and $pp\to d{\pi }^{+}$ near threshold are presented, employing the Jülich model for pion production. The influence of resonant (via the excitation of the $\Delta (1232)$) and non-resonant p-wave pion production mechanisms on these observables is examined. For the reactions $pp\to pn{\pi }^{+}$ and $pp\to d{\pi }^{+}$ nice agreement of our predictions with the presently available data on spin correlation coefficents is observed whereas for $pp\to pp{\pi }^0$ the description of the data is less satisfying.

arXiv comment10 pages, 4 figures

References in corpus (4)

• Role of the $\Delta$ isobar in the reaction $NN\to NN\pi$ near threshold
• Dependence of pp->pp pi0 near Threshold on the Spin of the Colliding Nucleons
• Initial singlet and triplet spin state contributions to pp -> pp pi0
• Spin Correlation Coefficients in pp-->pnpi+ from 325 to 400 MeV

Cited by in corpus (26)

• Meson production in nucleon--nucleon collisions close to the threshold
• Close-to-threshold Meson Production in Hadronic Interactions
• Towards a field theoretic understanding of NN->NNpi
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• p-Wave pion production from nucleon-nucleon collisions
• The near threshold N N -> d pi reaction in chiral perturbation theory
• Single-Pion Production in pp Collisions at =.95 GeV/c (I)
• Effective Field Theory calculations of $NN\to NN\pi$
• Spin correlations in $\vec{p}\vec{p}\to pn{\pi }^{+}$ pion production near threshold
• Pion production in nucleon-nucleon collisions in chiral effective field theory: next-to-next-to-leading order contributions
• Study of the reaction pp \to pp${\pi }^0$ within 10 MeV above the threshold
• Partial-wave analysis of $\vec{p}\vec{p}\to pp{\pi }^{\circ }$ data
• Vector meson angular distributions in proton-proton collisions
• Toy Model for Pion Production II: The role of three-particle singularities
• $P$-wave dibaryon resonances in $pp$ elastic scattering and near-threshold pion production
• Single-Pion Production in pp Collisions at 0.95 GeV/c (II)
• Pion reactions on two--nucleon systems
• Chiral perturbation theory calculation for pn -> dpipi at threshold
• Empirical Determination of Threshold Partial Wave Amplitudes in $pp\to pp\omega$
• Virtual-pion and two-photon production in pp scattering
• Anisotropy in the pion angular distribution of the reaction pp -> pp pi0 at 400 MeV
• Tensor polarization of $\omega$ produced at threshold in $p-p$ collisions
• Differential cross section and analyzing power of the $\vec{p}p\to pp{\pi }^0$ reaction at a beam energy of 390 MeV
• Omega meson production in pp collisions with a polarized beam
• Phase ambiguity of the threshold amplitude in pp -> ppπ^0
• The piNN system - recent progress