Phys.Lett. B609 (2004) 149

  Search for light pseudoscalar sgoldstino in K− decays

O.G. Tchikileva, et al.

Abstract

A search for the light pseudoscalar sgoldstino production in the 
three-body K− decay K−→π−π0P has been performed with the 
“ISTRA+” detector exposed to the 25 GeV/c negative secondary beam of 
the U-70 proton synchrotron. No signal is observed. An upper limit for the 
branching ratio Br(K−→π−π0P), at 90% confidence level, is 
determined to be not, vert, similar9×10−6 in the effective mass mP 
range from 0 to 200 MeV/c2, excluding the region near mπ0 where it 
degrades to not, vert, similar3.5×10−5.