Total and differential cross sections of $\eta$-production in proton-deuteron fusion for excess energies between $Q_{\eta }=13\text{MeV}$ and $Q_{\eta }=81\text{MeV}$

Abstract

New data on both total and differential cross sections of the production of $\eta$ mesons in proton-deuteron fusion to ${}^3\text{He}\eta$ in the excess energy region $13.6\text{MeV}\le Q_{\eta }\le 80.9\text{MeV}$ are presented. These data have been obtained with the WASA-at-COSY detector setup located at the Forschungszentrum Jülich, using a proton beam at 15 different beam momenta between $p_p=1.60\text{GeV}/c$ and $p_p=1.74\text{GeV}/c$. While significant structure of the total cross section is observed in the energy region $20\text{MeV}\lesssim Q_{\eta }\lesssim 60\text{MeV}$, a previously reported sharp variation around $Q_{\eta }\approx 50\text{MeV}$ cannot be confirmed. Angular distributions show the typical forward-peaking that was reported elsewhere. For the first time, it is possible to study the development of these angular distributions with rising excess energy over a large interval.

arXiv comment8 pages, 7 figures, preprint submitted to Physics Letters B

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Cited by in corpus (8)

• Etaprime and Eta Mesons with Connection to Anomalous Glue
• Search for the $\eta$ mesic ${}^3$He in the $pd\to dp{\pi }^0$ reaction with the WASA-at-COSY facility
• Search for eta mesic 3He with the WASA-at-COSY facility in the pd-> 3He 2gamma and pd-> 3He 6gamma reactions
• $P$-wave dibaryon resonances in $pp$ elastic scattering and near-threshold pion production
• 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