The kaonic (3)He and (4)He X-rays emitted in the [Formula: see text] transitions were measured in the SIDDHARTA experiment. The widths of the kaonic (3)He and (4)He 2p states were determined to be [Formula: see text], and [Formula: see text], respectively. Both results are consistent with the theoretical predictions. The width of kaonic (4)He is much smaller than the value of [Formula: see text] determined by the experiments performed in the 70's and 80's, while the width of kaonic (3)He was determined for the first time.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3405488 | PMC |
| http://dx.doi.org/10.1016/j.physletb.2012.06.071 | DOI Listing |
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