Evidence for πK-atoms with DIRAC

Citations of this article
Mendeley users who have this article in their library.


We present evidence for the first observation of electromagnetically bound π± K∓-pairs (πK-atoms) with the DIRAC experiment at the CERN-PS. The πK-atoms are produced by the 24   GeV / c proton beam in a thin Pt-target and the π± and K∓-mesons from the atom dissociation are 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, the measurement of which is the goal of the experiment. From these first data we derive a lower limit for the mean life of 0.8 fs at 90% confidence level. © 2009 Elsevier B.V. All rights reserved.




Adeva, B., Afanasyev, L., Allkofer, Y., Amsler, C., Anania, A., Benelli, A., … Zrelov, P. (2009). Evidence for πK-atoms with DIRAC. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 674(1), 11–16. https://doi.org/10.1016/j.physletb.2009.03.001

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free