Kaonic deuterium and low-energy antikaon-nucleon interaction
Department of Physics, Hokkaido University, Sapporo 060-0810, Japan
2 Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan
3 Physics Department, Technical University of Munich, 85748 Garching, Germany
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Published online: 25 June 2018
A new evaluation of the 1s level shift and width of kaonic deuterium is presented based on an accurate K̅ NN three-body calculation, using as input a realistic antikaon-nucleon interaction constrained by the SIDDHARTA kaonic hydrogen data. The three-body Schrödinger equation is solved with a superposition of a large number of correlated Gaussian basis functions extending over distance scales up to several hundred fm. The resulting energy shift and width of the kaonic deuterium 1s level are △E ≃ 0:67 keV and Γ ≃ 1.02 keV, with estimated uncertainties at the 10 % level.
© The Authors, published by EDP Sciences, 2018
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