Search For the SELEX X(2632) in the $DK$ Final State at FOCUS

Document #:

FOCUS-doc-701-v2

Document type:

Note

Submitted by:

Rob Kutschke

Updated by:

Rob Kutschke

Document Created:

12 Jul 2004, 15:56

Contents Revised:

13 Jul 2004, 18:04

DB Info Revised:

14 Jul 2004, 00:42

Abstract:

This note shows preliminary results of a search for the SELEX X(2632) state using the FOCUS spectrometer at Fermilab. The state was searched for in the decay modes $D^0K^+$ and $D^+K^0_S$. No signal is seen in either decay mode. For a narrow state, with a line shape dominated by the detector resolution, we set an upper limit on the yield of a narrow resonance at 5.3\% of the yield of the well established $D_{s2}^*(2572)$. For a state with a natural width of 17~MeV, the upper limit reported by SELEX, we set a limit on the yield ratio of 13\%. Both limits are reported at the 90\% confidence level. We also estimate the SELEX value of $R$ from information contained in their paper. For a narrow state the FOCUS value of $R$ and our estimate of the SELEX value agree at less than the 3\% CL. For a state with a natural width of 17~MeV, the FOCUS and SELEX values agree at less than the 5\% CL.

Files in Document:

• PDF (t.pdf, 672.4 kB)
• Postscript (t.ps, 1.2 MB)

Other Files:

• Figure 1 (eps) (breck08_redo.eps, 228.4 kB)
• Figure 2 (eps) (f006z.eps, 209.0 kB)
• Figure 3 (eps) (f007z.eps, 208.0 kB)
• Figure 4 (eps) (f009z.eps, 204.3 kB)
• Figure 5 (eps) (f010z.eps, 201.4 kB)
• Gzipped tar file of latex and eps source. ( Extract with: gunzip -c selex02.tar.gz | tar xf - ) (selex02.tar.gz, 210.5 kB)

Topics:

• Charm:Excited states

Authors:

• Rob Kutschke