Observation of a Narrow State Decaying into $Ξ_c^+π^-$

Details Observation of a Narrow State Decaying into $Ξ_c^+π^-$ Observation of a Narrow State Decaying into $Ξ_c^+π^-$

1995-08-04

arxiv.org/abs/hep-ex/9508010v1

Phys.Rev.Lett.75:4364-4368,1995

Physics

High Energy Physics

High Energy Physics - Experiment

12 page uuencoded postscript file, postscript file also available through http://w4.lns.cornell.edu/public/CLNS

Scientific paper

10.1103/PhysRevLett.75.4364

Using data recorded by the CLEO-II detector at CESR, we report the first observation of a narrow state decaying into $\Xi_c^+\pi^-$. The state has mass difference $M(\Xi_c^+\pi^-)-M(\Xi_c^+)$ of $178.2\pm0.5\pm1.0$ $\rm{MeV/c^2}$, and a width of $<5.5$ $\rm{MeV/c^2}$ (90\% confidence level limit). The most likely explanation of this new state is that it is the $J=\32$ spin excitation of the $\Xi_c^0$ charmed baryon.

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