A New Measurement of Kaonic Hydrogen X-rays
By M. Bazzi, G. Beer, L. Bombelli, A. Bragadireanu, M. Cargnelli, G. Corradi, C. Curceanu, A. D’uffizi, C. Fiorini, T. Frizzi and 27 more. 2011
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The KN system at threshold is a sensitive testing ground for low energy QCD, especially for the explicit chiral symmetry breaking. Therefore, we have measured the K-series x rays of kaonic hydrogen atoms at the DANE electron-positron collider of Laboratori Nazionali di Frascati, and have de- termined the most precise values of the strong-interaction energy-level shift and width of the 1s atomic state. As x-ray detectors, we used large-area silicon drift detectors having excellent energy and timing resolution, which were developed especially for the SIDDHARTA experiment. The shift and width were determined to be ǫ1s = 283 ± 36(stat) ± 6(syst) eV and 1s = 541± 89(stat) ± 22(syst) eV, respectively. The new values will provide vital constraints on the theoretical description of the low-energy KN interaction.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/8ba0c9ee4303c05e7fbb4fe4e353261b4e035aa1
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In Nuclear and High Energy Physics
Citations in the corpus
- Hadronic molecules (2017, methodology): “…(Ciborowski et al., 1982; Humphrey and Ross, 1962; Sakitt et al., 1965; Watson et al., 1963) complemented by the recent K̄N threshold amplitude extracted from data on kaonic hydrogen (Bazzi et al., 2011, 2012) as well as the older so-called threshold ratios (Nowak et al., 1978; Tovee et al., 1971).”