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Observation of a narrow meson decaying toDs+π0γat a mass of2.458GeV/c2

Journal article published in 2004 by B. Aubert, R. Barate, D. Boutigny, J.-M. Gaillard, A. Hicheur, Y. Karyotakis, J. P. Lees, P. Robbe, V. Tisserand, A. Zghiche, A. Palano, A. Pompili, J. C. Chen, N. D. Qi, G. Rong and other authors.
This paper is available in a repository.
This paper is available in a repository.

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Abstract

A narrow state, which we label D-sJ(2458)(+), with a mass 2458.0+/-1.0 (stat)+/-1.0 (syst) MeV/c(2), is observed in the inclusive D(s)(+)pi(0)gamma mass distribution in 91 fb(-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 D-s(*)(2112)(+)pi(0) rather than through D-sJ(*)(2317)(+)gamma. An analysis of D(s)(+)pi(0) data accounting for the influence of the D-sJ(2458)(+) produces a D-sJ(*)(2317)(+) mass of 2317.3+/-0.4 (stat)+/-0.8 (syst) MeV/c(2).