CERN Accelerating science

Published Articles
Title	Observation of $\pi^- K^+$ and $\pi^+ K^-$ atoms
Author(s)	Yazkov, Valeriy (SINP, Moscow)
Collaboration	DIRAC
Publication	2018
Number of pages	10
In:	EPJ Web Conf. 181 (2018) 01036
In:	International Conference on Exotic Atoms and Related Topics (EXA 2017), Vienna, Austria, 11 - 15 Sep 2017, pp.01036
DOI	10.1051/epjconf/201818101036
Subject category	Nuclear Physics - Experiment
Accelerator/Facility, Experiment	CERN PS ; DIRAC PS212
Abstract	Experiment DIRAC at CERN PS detects 349 ± 62 pairs from $\pi^-K^+$ and $\pi^+K^-$ atoms and makes observation of exotic atoms consist of pion and kaon. It allows to measure a difference of S-wave pion-kaon scattering length with isospin 1/2 and 3/2: $|a{_0^{1/2}}−a{_0^{3/2}}|$. Values of pion-kaon scattering lengths are predicted in a frame of ChPT and LQCD. Therefore investigation of $\pi^-K^+$ and $\pi^+K^-$ atoms gives possibility to check these predictions for simplest hadronhadron system with s-quark.
Copyright/License	CC-BY-4.0

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