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Abstract: (APS)
Using the CLEO detector at the Cornell Electron Storage Ring, we have found evidence for L=1 charmed mesons in e+e− annihilations. We observe a D**0 state at mass 2461±3±1 MeV/c2 and width 20−12−10+9+9 MeV/c2 decaying to D+π−. We also see an enhancement in the m(D*+π−)−m(D*+) mass-difference spectrum and by examining D*+ decay-angle dependence, we see structure consistent with two states decaying to D*+π−. We observe a lower-mass state, at mass (2428±3±2) MeV/c2 and width (23−6−4+8+10) MeV/c2, assuming that the higher-mass component is from the decay D**0(2461)→D*+π−. We present arguments for the spin-parity assignments of these states. We also report observation of candidate L=1 cs¯ state decaying to D*+Ks0.- electron positron: colliding beams
- colliding beams: electron positron
- electron positron: annihilation
- annihilation: electron positron
- charmed meson: electroproduction
- electroproduction: charmed meson
- angular momentum: 1
- spin: parity
- parity: spin
- charmed meson: mass
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