Details

Autor(en) / Beteiligte

• Dai, Lianrong
• Toledo, Genaro
• Oset, Eulogio

Titel

Searching for a DD¯ bound state with the ψ(3770)→γD0D¯0 decay

Ist Teil von

• The European physical journal. C, Particles and fields, 2020-06, Vol.80 (6)

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We perform a calculation of the mass distribution in the ψ ( 3770 ) → γ D D ¯ decay, studying both the D + D - and D 0 D ¯ 0 decays. The electromagnetic interaction is such that the tree level amplitude is null for the neutral channel, which forces the ψ ( 3770 ) → γ D 0 D ¯ 0 transition to go through a loop involving the D + D - → D 0 D ¯ 0 scattering amplitude. We take the results for this amplitude from a theoretical model that predicts a D D ¯ bound state and find a D 0 D ¯ 0 mass distribution in the decay drastically different than phase space. The rates obtained are relatively large and the experiment is easily feasible in the present BESIII facility. The performance of this experiment could provide an answer to the issue of this much searched for state, which is the analogue of the f 0 ( 980 ) resonance.