AI Article Synopsis
- The study focuses on measuring the x-ray transitions in kaonic ^{3}He and ^{4}He atoms using advanced microcalorimeters, achieving high energy resolution.
- The measured transition energies are 6224.5 eV for kaonic ^{3}He and 6463.7 eV for kaonic ^{4}He, with significantly lower width values compared to earlier findings.
- The results challenge previous theories suggesting large interaction shifts and align more closely with predictions made by optical-potential models.
Article Abstract
We have measured the 3d→2p transition x rays of kaonic ^{3}He and ^{4}He atoms using superconducting transition-edge-sensor microcalorimeters with an energy resolution better than 6 eV (FWHM). We determined the energies to be 6224.5±0.4(stat)±0.2(syst) eV and 6463.7±0.3(stat)±0.1(syst) eV, and widths to be 2.5±1.0(stat)±0.4(syst) eV and 1.0±0.6(stat)±0.3(stat) eV, for kaonic ^{3}He and ^{4}He, respectively. These values are nearly 10 times more precise than in previous measurements. Our results exclude the large strong-interaction shifts and widths that are suggested by a coupled-channel approach and agree with calculations based on optical-potential models.
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| http://dx.doi.org/10.1103/PhysRevLett.128.112503 | DOI Listing |
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