Search forψ(3770)→ρπat the BESII detector at the Beijing Electron-Positron Collider

M Ablikim,K L He,T Hu,Z Y Deng,C S Gao,J B Liu,D P Jin,Y Yuan,L Y Dong,X B Ji,G Rong,Z P Mao,B S Zou,M He,H Qin,Zhe Wang,S L Zang,X Tang,Y Zeng,J C Chen,Q M Zhu,S X Du,J Nie,K J Zhu,Y X Ye,B A Zhuang,M G Zhao,X Y Shen,H Y Zhang,J B Jiao,Y S Dai,Y K Heng,X Cai,Z J Sun,J Fang,Y S Zhu,Yiyun Zhang,X T Huang,X H Mo,X M Xia,X S Jiang,D H Wei,H S Chen,Fang Liu,J Z Bai,C Z Yuan,N D Qi,G Li,J F Qiu,H M Hu,C C Zhang,Y P Chu,Z P Zheng,Y F Liang,Z A Liu,S Jin,C L Luo,Z P Zhang,F Liu,Y Ban,M H Ye,J G Lu,G F Xu,X Y Zhang,Jin Chen,C D Fu,Y T Gu,H Y Sheng,S S Fang,Zheng Wang,Z A Zhu ,P L Wang ,H X Yang ,Q M ,Nengyou Wu ,X Zhuang ,R G Liu ,M Wang ,Y Xu ,P P Zhao ,X L Li ,H Liao ,W D Li ,Y Zhu ,Yifan Yang ,Y L Li ,J Liu ,J G Bian ,Y F Wang ,X Shi ,Dongxu Zhao ,Y N Guo ,S Gu ,F Yang ,S M Li ,H H Li ,D Y Wang ,L Shang ,H B Li ,R Y Li ,X X Xie ,Jiawei Zhao ,Y B Chen ,C X Liu ,Yang Tian ,Z Y Wang ,H H Liu ,L S Wang ,Z Ren ,J M Yuan ,J F Sun ,Z Z Du ,J W Zhang ,H F Chen ,D L Shen ,X M Zhang ,Z Wang ,X Q Li ,D H Zhang ,L L ,F C ,Luohan Wang ,F X Lu ,Qingshun Dong ,G R Lu ,Zhou Li ,P Wang ,J Y Zhang ,B Y Zhang ,J Yang ,Y Z Sun ,J P Liu ,G L Tong ,Feng Shi ,Zhao Yi ,H L ,Z Q Zhang ,X Z Cui ,Na Zhou ,J P Zheng ,W G Li ,X P Huang ,J Li ,H M Liu ,H Peng ,H J Lü ,Y F Lai ,H Q Zheng ,Y Q Guo ,Mu-Lin Yan ,H X Chen ,Zhengguo Tan ,L Y Shan ,X B ,Y Jin ,W R Zhao ,S Sun ,W F Wang ,Bin Xin ,B X Zhang ,S P ,G Yu ,Q J Zhang ,C Wei ,Yang Gao ,H Sun

doi:10.1103/physrevd.72.072007

Abstract

Non-DD¯ decay ψ(3770)→ρπ is searched for using a data sample of (17.3±0.5) pb−1 taken at the center-of-mass energy of 3.773 GeV by the BESII detector at the BEPC. No ρπ signal is observed, and the upper limit of the cross section is measured to be σ(e+e−→ρπ)<6.0 pb at 90% C. L. Considering the interference between the continuum amplitude and the ψ(3770) resonance amplitude, the branching fraction of ψ(3770) decays to ρπ is determined to be B(ψ(3770)→ρπ)∈(6.0×10−6,2.4×10−3) at 90% C. L. This is in agreement with the prediction of the S- and D-wave mixing scheme of the charmonium states for solving the “ρπ puzzle” between J/ψ and ψ(2S) decays.Received 21 July 2005DOI:https://doi.org/10.1103/PhysRevD.72.072007©2005 American Physical Society

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