Details

Autor(en) / Beteiligte

• Ablikim, M
• Achasov, M N
• Adlarson, P
• Aliberti, R
• Amoroso, A
• An, M R
• An, Q
• Bai, Y
• Bakina, O
• Balossino, I
• Ban, Y
• Batozskaya, V
• Begzsuren, K
• Berger, N
• Berlowski, M
• Bertani, M
• Bettoni, D
• Bianchi, F
• Bianco, E
• Bloms, J
• Bortone, A
• Boyko, I
• Briere, R A
• Brueggemann, A
• Cai, H
• Cai, X
• Calcaterra, A
• Cao, G F
• Cao, N
• Cetin, S A
• Chang, J F
• Chang, T T
• Chang, W L
• Che, G R
• Chelkov, G
• Chen, C
• Chen, Chao
• Chen, G
• Chen, H S
• Chen, M L
• Chen, S J
• Chen, S M
• Chen, T
• Chen, X R
• Chen, X T
• Chen, Y B
• Chen, Y Q
• Chen, Z J
• Cheng, W S
• Choi, S K
• Chu, X
• Cibinetto, G
• Coen, S C
• Cossio, F
• Cui, J J
• Dai, H L
• Dai, J P
• Dbeyssi, A
• de Boer, R E
• Dedovich, D
• Deng, Z Y
• Denig, A
• Denysenko, I
• Destefanis, M
• De Mori, F
• Ding, B
• Ding, X X
• Ding, Y
• Dong, J
• Dong, L Y
• Dong, M Y
• Dong, X
• Du, S X
• Duan, Z H
• Egorov, P
• Fan, Y L
• Fang, J
• Fang, S S
• Fang, W X
• Fang, Y
• Farinelli, R
• Fava, L
• Feldbauer, F
• Felici, G
• Feng, C Q
• Feng, J H
• Fischer, K
• Fritsch, M
• Fritzsch, C
• Fu, C D
• Fu, J L
• Fu, Y W
• Gao, H
• Gao, Y N
• Gao, Yang
• Garbolino, S
• Garzia, I
• Ge, P T
• Ge, Z W

Titel

Study of the f_{0}(980) and f_{0}(500) Scalar Mesons through the Decay D_{s}^{+}→π^{+}π^{-}e^{+}ν_{e}

Ist Teil von

• Physical review letters, 2024-04, Vol.132 (14), p.141901-141901

Ort / Verlag

United States

Erscheinungsjahr

2024

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• Using e^{+}e^{-} collision data corresponding to an integrated luminosity of 7.33  fb^{-1} recorded by the BESIII detector at center-of-mass energies between 4.128 and 4.226 GeV, we present an analysis of the decay D_{s}^{+}→π^{+}π^{-}e^{+}ν_{e}, where the D_{s}^{+} is produced via the process e^{+}e^{-}→D_{s}^{*±}D_{s}^{∓}. We observe the f_{0}(980) in the π^{+}π^{-} system and the branching fraction of the decay D_{s}^{+}→f_{0}(980)e^{+}ν_{e} with f_{0}(980)→π^{+}π^{-} measured to be (1.72±0.13_{stat}±0.10_{syst})×10^{-3}, where the uncertainties are statistical and systematic, respectively. The dynamics of the D_{s}^{+}→f_{0}(980)e^{+}ν_{e} decay are studied with the simple pole parametrization of the hadronic form factor and the Flatté formula describing the f_{0}(980) in the differential decay rate, and the product of the form factor f_{+}^{f_{0}}(0) and the c→s Cabibbo-Kobayashi-Maskawa matrix element |V_{cs}| is determined for the first time to be f_{+}^{f_{0}}(0)|V_{cs}|=0.504±0.017_{stat}±0.035_{syst}. Furthermore, the decay D_{s}^{+}→f_{0}(500)e^{+}ν_{e} is searched for the first time but no signal is found. The upper limit on the branching fraction of D_{s}^{+}→f_{0}(500)e^{+}ν_{e}, f_{0}(500)→π^{+}π^{-} decay is set to be 3.3×10^{-4} at 90% confidence level.