We have observed a narrow state near 2.32   GeV/c2 in the inclusive Ds+π0 invariant mass distribution from 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 SLAC PEP-II asymmetric-energy e+e- storage ring.

Observation of a narrow meson decaying to Ds+ pi0 at a mass of 2.32 GeV/c2

CONTRI, ROBERTO;LO VETERE, MAURIZIO;MONGE, MARIA ROBERTA;PATRIGNANI, CLAUDIA;ROBUTTI, ENRICO;SANTRONI, ALBERTO;TOSI, SILVANO;
2003-01-01

Abstract

We have observed a narrow state near 2.32   GeV/c2 in the inclusive Ds+π0 invariant mass distribution from 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 SLAC PEP-II asymmetric-energy e+e- storage ring.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/212636
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