First Observation of the Decay D_s^+ to proton anti-neutron

Details First Observation of the Decay D_s^+ to proton anti-neutron First Observation of the Decay D_s^+ to proton anti-neutron

2008-03-07

arxiv.org/abs/0803.1118v2

Phys.Rev.Lett.100:181802,2008

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, available through http://www.lns.cornell.edu/public/CLNS/, submitted to PRL Small changes following referee's suggest

Scientific paper

10.1103/PhysRevLett.100.181802

Using e^+e^- -> D_s^*+ D_s^- data collected near the peak D_s production energy, E_cm=4170 MeV, with the CLEO-c detector, we present the first observation of the decay D_s^+ -> proton anti-neutron. We measure a branching fraction B(D_s^+ -> p anti-n = (1.30 +- 0.36 +0.12 -0.16) x 10^-3. This is the first observation of a charmed meson decaying into a baryon-antibaryon final state.

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