Details

Autor(en) / Beteiligte

• Alberto, D
• An, F F
• Baldini Ferroli, R B F
• Becker, J
• Bertani, M B
• Bytev, V
• Cao, G F
• Chen, G
• Chen, S J
• Chen, Y B
• Cronin-Hennessy, D
• Dedovich, D
• Deng, Z Y
• Denysenko, I
• Du, S X
• Fang, J
• Feng, C Q
• Harris, F A
• He, M
• Hu, J F
• Hu, T
• Huang, B
• Huang, G M
• Huang, J S
• Huang, Y P
• Hussain, T
• Ji, C S
• Jia, L K
• Jiao, Z
• Jin, D P
• Kalantar-Nayestanaki, N
• Lange, J S
• Li, C H
• Li, F
• Li, H B
• Li, K
• Li, W G
• Li, X R
• Li, Z B
• Liang, Y T
• Liao, G R
• Liao, X T
• Liu, C L
• Liu, K Y
• Liu, X H
• Liu, Z A
• Lu, H J
• Lu, J G
• Luo, M X
• Ma, Q M
• Ma, T
• Malik, Q A
• Mao, H
• Mao, Y J
• Muchnoi, N Yu
• Olsen, S L
• Park, J W
• Pelizaeus, M
• Ping, J L
• Pun, C S J
• Qian, S
• Qin, X S
• Qiu, J F
• Rashid, K H
• Sarantsev, A
• Shao, M
• Sheng, H Y
• Shepherd, M R
• Song, X Y
• Sun, G X
• Sun, Y Z
• Tang, X
• Tian, H L
• Wang, P
• Wang, P L
• Wang, S G
• Wang, X F
• Wang, Y Q
• Wu, L H
• Xiu, Q L
• Xu, H
• Yan, W B
• Yan, Y H
• Yang, T
• Yu, S P
• Yuan, W L
• Zafar, A A
• Zhang, B X
• Zhang, C C
• Zhang, J Z
• Zhao, G
• Zhao, H S
• Zhao, Lei
• Zhao, Q
• Zhao, T C
• Zhao, X H
• Zheng, B
• Zhong, B
• Zhou, X K
• Zhu, Z A

Titel

Spin-parity analysis of pp¯ mass threshold structure in J/ψ and ψ(3686) radiative decays

Ist Teil von

• Physical review letters, 2012-03, Vol.108 (11), p.112003-112003

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2012

Quelle

American Physical Society

Beschreibungen/Notizen

• A partial wave analysis of the pp¯ mass-threshold enhancement in the reaction J/ψ→γpp¯ is used to determine its J(PC) quantum numbers to be 0(-+), its peak mass to be below threshold at M=1832(-5)(+19)(stat)(-17)(+18)(syst)±19(model) MeV/c(2), and its total width to be Γ<76 MeV/c(2) at the 90% C.L. The product of branching ratios is measured to be BR[J/ψ→γX(pp¯)]BR[X(pp¯)→pp¯]=[9.0(-1.1)(+0.4)(stat)(-5.0)(+1.5)(syst)±2.3(model)]×10(-5). A similar analysis performed on ψ(3686)→γpp¯ decays shows, for the first time, the presence of a corresponding enhancement with a production rate relative to that for J/ψ decays of R=[5.08(-0.45)(+0.71)(stat)(-3.58)(+0.67)(syst)±0.12(model)]%.