Cross section ratio and angular distributions of the reaction p + d -> 3He + eta at 48.8 MeV and 59.8 MeV excess energy

Abstract

We present new data for angular distributions and on the cross section ratio of the p + d -> 3He + eta reaction at excess energies of Q = 48.8 MeV and Q = 59.8 MeV. The data have been obtained at the WASA-at-COSY experiment (Forschungszentrum Jülich) using a proton beam and a deuterium pellet target. While the shape of obtained angular distributions show only a slow variation with the energy, the new results indicate a distinct and unexpected total cross section fluctuation between Q = 20 MeV and Q = 60 MeV, which might indicate the variation of the production mechanism within this energy interval.

9 pages, 9 figures

References in corpus (2)

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

Cited by in corpus (7)

• Etaprime and Eta Mesons with Connection to Anomalous Glue
• Measurement of the $\eta \to {\pi }^{+}{\pi }^{-}{\pi }^0$ Dalitz plot distribution
• Measurements of Branching Ratios for $\eta$ Decays into Charged Particles
• 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 $C$ violation in the decay $\eta \to {\pi }^0+e^{+}+e^{-}$ with WASA-at-COSY
• New physics via pion capture and simple nuclear reactions
• Backward single-pion production in the $\mathbf{pd}\to {}^3\text{He}{\mathbf{\pi }}^0$ reaction with WASA-at-COSY