Observation of a narrow resonance of mass 2.46-GeV/c**2 decaying to D*+(s) pi0 and confirmation of the D*(sJ)(2317) state
May, 200316 pages
Published in:
- Phys.Rev.D 68 (2003) 032002,
- Phys.Rev.D 75 (2007) 119908 (erratum)
e-Print:
- hep-ex/0305100 [hep-ex]
Report number:
- CLNS-03-1826,
- CLEO-03-09,
- CLNS03-1826
Experiments:
- CESR-CLEO-II
View in:
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Abstract: (arXiv)
Using 13.5 inverse fb of e+e- annihilation data collected with the CLEO II detector we have observed a narrow resonance in the Ds*+pi0 final state, with a mass near 2.46 GeV. The search for such a state was motivated by the recent discovery by the BaBar Collaboration of a narrow state at 2.32 GeV, the DsJ*(2317)+ that decays to Ds+pi0. Reconstructing the Ds+pi0 and Ds*+pi0 final states in CLEO data, we observe peaks in both of the corresponding reconstructed mass difference distributions, dM(Dspi0)=M(Dspi0)-M(Ds) and dM(Ds*pi0)=M(Ds*pi0)-M(Ds*), both of them at values near 350 MeV. We interpret these peaks as signatures of two distinct states, the DsJ*(2317)+ plus a new state, designated as the DsJ(2463)+. Because of the similar dM values, each of these states represents a source of background for the other if photons are lost, ignored or added. A quantitative accounting of these reflections confirms that both states exist. We have measured the mean mass differences Note:
- Supercedes results reported in hep-ex/0305017 •
- 16 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS, version to be published in Physical Review D; minor modifications and fixes to typographical errors, plus an added section on production properties. The main results are unchanged; they supersede those reported in hep-ex/0305017
- 14.40.Lb
- 13.25.Ft
- 12.40.Yx
- electron positron: colliding beams
- electron positron: annihilation
- narrow resonance: search for
- D/s0*(2317): hadronic decay
- D/sJ*(2460): hadronic decay
- mass spectrum: mass difference
- spin: parity
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