The FOCUS (Kp)mn signal
21,370 events
Right Sign
Wrong Sign
Data
Fit
charm bkg
After accounting for charm backgrounds from Monte Carlo, the WS-subracted Kp spectrum seems to be essentially 100% K*(890) !! This has been “known” for about 20 years.
We will challenge this!
MKp (GeV/c2)
events
RS-WS
backgrounds are pretty small
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