A narrow state, which we label DsJ(2458)+, with a mass 2458.0±1.0(stat)±1.0(syst)MeV/c2, is observed in the inclusive Ds+π0γ mass distribution in 91fb-1 of e+e- annihilation data recorded by the BABAR detector at the SLAC PEP-II asymmetric-energy e+e- storage ring. The observed width is consistent with the experimental resolution. The data favor decay through Ds*(2112)+π0 rather than through DsJ*(2317)+γ. An analysis of Ds+π0 data accounting for the influence of the DsJ(2458)+ produces a DsJ*(2317)+ mass of 2317.3±0.4(stat)±0.8(syst)MeV/c2.
Observation of a narrow meson decaying to D-s(+)pi(0)gamma at a mass of 2.458 GeV/c(2)
MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;VOCI, CESARE;SIMI, GABRIELE;
2004
Abstract
A narrow state, which we label DsJ(2458)+, with a mass 2458.0±1.0(stat)±1.0(syst)MeV/c2, is observed in the inclusive Ds+π0γ mass distribution in 91fb-1 of e+e- annihilation data recorded by the BABAR detector at the SLAC PEP-II asymmetric-energy e+e- storage ring. The observed width is consistent with the experimental resolution. The data favor decay through Ds*(2112)+π0 rather than through DsJ*(2317)+γ. An analysis of Ds+π0 data accounting for the influence of the DsJ(2458)+ produces a DsJ*(2317)+ mass of 2317.3±0.4(stat)±0.8(syst)MeV/c2.File in questo prodotto:
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