Precision study of the d+p->3He+eta reaction for excess energies between 20 and 60 MeV

Abstract

The differential and total cross sections for the d+p->3He+eta reaction have been measured at COSY-ANKE at excess energies of 19.5, 39.4, and 59.4 MeV over the full angular range. The results are in line with trends apparent from the detailed near-threshold studies and also agree with those from CELSIUS, though the present data have higher precision. While at 19.5 MeV the results can be described in terms of s- and p-wave production, by 59.4 MeV higher partial waves are required. Including the 19.5 MeV point together with the near-threshold data in a global s- and p-wave fit gives a poorer overall description of the data though the position of the pole in the 3He scattering amplitude, corresponding to the quasi-bound or virtual state, is hardly changed.

arXiv comment4 pages, 4 figures, 1 table

References in corpus (5)

• Near-Threshold Production of $\eta$-Mesons
• Precision study of the eta-3He system using the d+p->3He+eta reaction
• Measurement of the dp -->3He eta reaction near threshold
• Is there an eta-3He quasi--bound state ?
• Measurement of p + d -> 3He + eta in S(11) Resonance

Cited by in corpus (17)

• Coherent photoproduction of eta-mesons off 3He - search for eta-mesic nuclei
• Etaprime and Eta Mesons with Connection to Anomalous Glue
• Interaction of eta mesons with nuclei
• Photoproduction of mesons off nuclei
• Determination of the ${\mathbf{\eta }}^3\mathrm{He}$ threshold structure from the low energy $\mathbf{pd}\to {\mathbf{\eta }}^3\mathrm{He}$ reaction
• Measurement of the $\eta \to {\pi }^{+}{\pi }^{-}{\pi }^0$ Dalitz plot distribution
• Coherent photoproduction of pi^0- and eta-mesons off 7Li
• Measurements of Branching Ratios for $\eta$ Decays into Charged Particles
• Cross section ratio and angular distributions of the reaction p + d -> 3He + eta at 48.8 MeV and 59.8 MeV excess energy
• New determination of the mass of the eta meson at COSY-ANKE
• Total and differential cross sections of $\eta$-production in proton-deuteron fusion for excess energies between $Q_{\eta }=13\text{MeV}$ and $Q_{\eta }=81\text{MeV}$
• Search for eta mesic 3He with the WASA-at-COSY facility in the pd-> 3He 2gamma and pd-> 3He 6gamma reactions
• Experimental and theoretical study of deuteron-proton elastic scattering for proton kinetic energies between $T_p=882.2\text{MeV}$ and $T_p=918.3\text{MeV}$
• Backward single-pion production in the $\mathbf{pd}\to {}^3\text{He}{\mathbf{\pi }}^0$ reaction with WASA-at-COSY
• Search for eta-mesic 3He in non-mesonic final states
• Total and differential cross sections of the $\mathbf{dp}\to {}^3\text{He}\mathbf{\eta }$ reaction at excess energies between 1 and 15 MeV
• Production of eta and 3pi mesons in the pd->3HeX reaction at 1360 and 1450 MeV