Simultaneous Measurements of the $p+d\to (A=3)+\pi$ Reactions

Abstract

A stack of annular detectors made of high purity germanium was used to measure simultaneously $pd\to {}^{3}H{\pi }^{+}$ and $pd\to {}^{3}He{\pi }^0$ differential cross sections at beam momenta of 750 MeV/c, 800 MeV/c, and 850 MeV/c over a large angular range. The extracted total cross sections for the $pd\to {}^{3}He{\pi }^0$ reactions bridge a gap between near threshold data and those in the resonance region. The ratio of the cross sections for the two reaction channels taken at the same $\eta =p_{\pi }^{cm}/m_{\pi }$ yields $2.11\pm 0.08$ indicating that a deviation from isospin symmetry is very small.

arXiv comment23 pages, latex, 15 figures

References in corpus (5)

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• Light Quark Mass Difference and Isospin Breaking In Electromagnetic Pion Production
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Cited by in corpus (12)

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• Spectroscopy of pionic atoms in ${}^{122}\text{S}\mathbf{n}(\text{d},{}^3\text{H}\mathbf{e})$ reaction and angular dependence of the formation cross sections
• (d,3He) reaction on odd-neutron nuclear target for the formation of deeply bound pionic atoms
• Search for Low Mass Exotic mesonic structures. Part I: experimental results
• Investigation of the dd -> 3He n π0 reaction with the FZ Jülich WASA-at-COSY facility
• Positive pion absorption on 3He using modern trinucleon wave functions
• Coherent pion production in proton-deuteron collisions
• Charge independence studied in $NN\to d\pi$ reactions
• Recent Physics At COSY--A Review