Single-and multi-nucleon K⁻ interactions with nuclei near threshold

Racah Institute of Physics, the Hebrew University, Jerusalem

^* e-mail: elifried@cc.huji.ac.il
^** e-mail: avragal@savion.huji.ac.il

Published online: 25 June 2018

Abstract

Six recent SU(3) chiral-model EFT approaches to the K̅-nucleon interaction near threshold, constrained by K⁻ p low-energy scattering and reaction data and by the kaonic hydrogen SIDDHARTA experiment, are used as input in kaonic atom calculations. Good agreement with the world-data on kaonic atoms is achieved with optical potentials built on the above models only when K̅N amplitudes are supplemented by a phenomenological multi-nucleon term. Comparing predictions with experimental single-nucleon absorption-at-rest fractions on nuclei, only two of the models together with their associated phenomenological term are acceptable. The information content of K⁻-nucleus data near threshold is discussed and the topic of deeply-bound kaonic atoms is re-visited.