Observation of a Narrow Meson Decaying to Ds+pi0 at a Mass of 2.32 GeV/c^2

Details Observation of a Narrow Meson Decaying to Ds+pi0 at a Mass of 2.32 GeV/c^2 Observation of a Narrow Meson Decaying to Ds+pi0 at a Mass of 2.32 GeV/c^2

2003-04-12

arxiv.org/abs/hep-ex/0304021v1

Phys.Rev.Lett.90:242001,2003

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 3 figures, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.90.242001

We have observed a narrow state near 2.32 GeV/c^2 in the inclusive Ds+ pi0 invariant mass distributionfrom e+e- annihilation data at energies near 10.6 GeV. The observed width is consistent with the experimental resolution. The small intrinsic width and the quantum numbers of the final state indicate that the decay violates isospin conservation. The state has natural spin-parity and the low mass suggests a JP=0+ assignment. The data sample corresponds to an integrated luminosity of 91 fb-1 recorded by the BABAR detector at the PEP2 asymmetric-energy e+e- storage ring.

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