RT Journal Article
T1 Evidence for pi-K -atoms with DIRAC
A1 DIRAC Collaboration, 
A1 Adeva Andany, Bernardo
A1 López Aguera, María de los Ángeles
A1 Pló Casasús, Máximo
A1 Romero Vidal, Antonio
A1 Saborido Silva, Juan José
A1 Zrelov, P.
K1 DIRAC experiment
K1 Exotic atoms
K1 Scattering leng
K1 πK-scatteringth
K1 Chiral perturbation
AB 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 twoarm 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.
PB Elsevier
SN 0370-2693
YR 2009
FD 2009-04-06
LK https://hdl.handle.net/10347/39263
UL https://hdl.handle.net/10347/39263
LA eng
NO Physics Letters B Volume 674, Issue 1, 6 April 2009, Pages 11-16
DS Minerva
RD 22 abr 2026