Experimental study of the pd (dp) -> He-3 pi pi reactions close to threshold

Bellemann F.; Berg A.; Bisplinghoff J.; Bohlscheid G.; Ernst J.; Henrich C.; Hinterberger F.; Ibald R.; Jahn R.; Joosten R.; Kilian K.; Kozela A.; Machner H.; Magiera A.; Munkel J.; von Neumann-Cosel P.; von Rossen P.; Schnitker H.; Scho K.; Smyrski J.; Toelle R.; Wilkin C.

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Experimental study of the pd (dp) -> He-3 pi pi reactions close to threshold

机译：PD（DP） - > HE-3 PI PI反应接近阈值的实验研究

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New experimental data on the pd -> He-3 pi(+)pi(-) reaction obtained with the COSY-MOMO detector below the three-pion threshold are presented. The reaction was also studied in inverse kinematics with a deuteron beam and the higher counting rates achieved were especially important at low excess energies. The comparison of these data with inclusive pd -> He-3 X-0 rates allowed estimates also to be made of pi(0)pi(0) production. The results confirm our earlier findings that, close to threshold, there is no enhancement at low excitation energies in the pi(+)pi(-) system, where the data seem largely suppressed compared with phase space. Possible explanations for this behavior, such as strong p waves in the pi(+)pi(-) system or the influence of two-step processes, are explored.

机译：提出了用低于三孔阈值的舒适 - MOMO检测器获得的PD - > HE-3 PI（+）PI（ - ）反应的新实验数据。还使用氘核束在逆运动学中研究了反应，并且在低过量能量下实现的较高计数率尤为重要。这些数据的比较具有包容性PD - > HE-3 X-0率允许估计，也可以由PI（0）PI（0）制成。结果证实了我们之前的发现，接近阈值，PI（+）PI（ - ）系统的低励磁能量没有增强，其中数据似乎与相空间相比似乎很大抑制。探讨了这种行为的可能解释，例如PI（+）PI（ - ）系统中的强P波或两步过程的影响。

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《Physical review, C》 |2016年第3期|共9页
作者
Bellemann F.; Berg A.; Bisplinghoff J.; Bohlscheid G.; Ernst J.; Henrich C.; Hinterberger F.; Ibald R.; Jahn R.; Joosten R.; Kilian K.; Kozela A.; Machner H.; Magiera A.; Munkel J.; von Neumann-Cosel P.; von Rossen P.; Schnitker H.; Scho K.; Smyrski J.; Toelle R.; Wilkin C.;
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作者单位

Univ Bonn Inst Strahlen &

Kernphys D-53115 Bonn Germany;

Univ Bonn Inst Strahlen &

Kernphys D-53115 Bonn Germany;

Univ Bonn Inst Strahlen &

Kernphys D-53115 Bonn Germany;

Univ Bonn Inst Strahlen &

Kernphys D-53115 Bonn Germany;

Univ Bonn Inst Strahlen &

Kernphys D-53115 Bonn Germany;

Univ Bonn Inst Strahlen &

Kernphys D-53115 Bonn Germany;

Univ Bonn Inst Strahlen &

Kernphys D-53115 Bonn Germany;

Univ Bonn Inst Strahlen &

Kernphys D-53115 Bonn Germany;

Univ Bonn Inst Strahlen &

Kernphys D-53115 Bonn Germany;

Univ Bonn Inst Strahlen &

Kernphys D-53115 Bonn Germany;

Forschungszentrum Julich Inst Kernphys D-52425 Julich Germany;

Inst Nucl Phys PL-31342 Krakow Poland;

Univ Duisburg Essen Fak Phys Lotharstr 1 D-47048 Duisburg Germany;

Jagiellonian Univ Inst Phys PL-30059 Krakow Poland;

Univ Bonn Inst Strahlen &

Kernphys D-53115 Bonn Germany;

Tech Univ Darmstadt Inst Kernphys D-64289 Darmstadt Germany;

Forschungszentrum Julich Inst Kernphys D-52425 Julich Germany;

Univ Bonn Inst Strahlen &

Kernphys D-53115 Bonn Germany;

Univ Bonn Inst Strahlen &

Kernphys D-53115 Bonn Germany;

Jagiellonian Univ Inst Phys PL-30059 Krakow Poland;

Forschungszentrum Julich Inst Kernphys D-52425 Julich Germany;

UCL Dept Phys &

Astron London WC1E 6BT England;

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中图分类原子核物理学、高能物理学;
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1. Experimental study of the pd (dp) -> He-3 pi pi reactions close to threshold [J] . Bellemann F., Berg A., Bisplinghoff J., Physical review, C . 2016,第3期

机译：PD（DP） - > HE-3 PI PI反应接近阈值的实验研究
2. Analysis of eta decay into pi(+)pi(-)e(+)e(-) in the pd -> He-3 eta reaction [J] . Jacewicz M, Kupsc A Acta Physica Slovaca . 2006,第3期

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3. Backward single-pion production in the pd - He-3 pi(0)reaction with WASA-at-COSY [J] . Adlarson P., Augustyniak W., Bardan W., The European Physical Journal, A. Hadrons and Nuclei . 2018,第9期

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7. Study of the pd(dp) -> 3He pi pi reactions close to threshold [O] . Bellemann, F., Berg, A., Bisplinghoff, J., 2016

机译：研究pd（dp） - > 3He pi pi反应接近阈值

Experimental study of the pd (dp) -> He-3 pi pi reactions close to threshold

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