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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-25484

Allkofer, Y (2009). Observation of πK-atoms with DIRAC-II. Hyperfine Interactions, 193(1-3):39-45.

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Abstract

We present evidence for the first observation of electromagnetically bound π ± K  ∓ -pairs (πK-atoms) with the DIRAC-II experiment at the CERN-PS. The πK-atoms are produced by the 24 GeV/c proton beam in a thin Pt-target and the dissociated π ± and K  ∓ -mesons analyzed in a two-arm magnetic spectrometer. The observed enhancement at low relative momentum corresponds to the production of 173±54 πK-atoms. The mean life of πK-atoms is related to the s-wave πK-scattering lengths. From these first data we derive a lower limit for the mean life of 1.5 fs at 84% confidence level.

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
DDC:530 Physics
Language:English
Date:2009
Deposited On:05 Jan 2010 12:59
Last Modified:27 Nov 2013 18:38
Publisher:Springer
ISSN:0304-3843
Publisher DOI:10.1007/s10751-009-0067-9
Citations:Web of Science®
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