First measurement of kaonic helium-3 X-rays
First measurement of kaonic helium-3 X-rays
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DOI：
10.1016/j.physletb.2011.02.001
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发表时间：
2011-03-07
影响因子：
4.4
通讯作者：
Zmeskal, J.
中科院分区：
文献类型：
--
作者：
Bazzi, M.;Beer, G.;Zmeskal, J.
首次观测到氦-3的3d -> - 2p跃迁，使用的是停留在气态氦-3靶中的慢K介子。利用DA Phi NE e(+)e（-）对撞机产生的K+K-对π介子衰变的时间信息，用大面积硅漂移探测器探测了kaonic原子x射线。确定了he - 32p态的强相互作用位移为-2 +/- 2 (stat) +/- 4 (syst) eV。(c) 2011 Elsevier B.V.版权所有
The first observation of the kaonic He-3 3d -> 2p transition was made, using slow K- mesons stopped in a gaseous He-3 target. The kaonic atom X-rays were detected with large-area silicon drift detectors using the timing information of the K+K- pairs of phi-meson decays produced by the DA Phi NE e(+)e(-) collider. The strong interaction shift of the kaonic He-3 2p state was determined to be -2 +/- 2 (stat) +/- 4 (syst) eV. (c) 2011 Elsevier B.V. All rights reserved.