|
|||||
|
|
Measurement of the e+e- -->pi+pi- J/psi cross section via initial-state radiation at Belle |
|
| Authors: | Yuan C Z Shen C P Wang P McOnie S Adachi I Aihara H Aulchenko V Aushev T Bahinipati S Balagura V Barberio E Bedny I Bitenc U Bondar A Bozek A Bracko M Brodzicka J Browder T E Chang M-C Chang P Chen A Chen K-F Chen W T Cheon B G Chistov R Cho I-S Choi Y Dalseno J Danilov M Dash M Eidelman S Fratina S Gabyshev N Golob B Ha H Haba J Hayasaka K Hayashii H Hazumi M Heffernan D Hokuue T Hoshi Y Hou W-S Hsiung Y B Hyun H J Iijima T Ikado K Inami K Ishikawa A Itoh R Iwasaki Y Kah D H Kaji H Kang J H Katayama N Kawai H Kawasaki T Kichimi H Kim Y J Kinoshita K Korpar S Krizan P Krokovny P Kumar R |
| Affiliation: | Institute of High Energy Physics, Chinese Academy of Sciences, Beijing. |
| Abstract: | The cross section for e(+)e(-)-->pi(+)pi(-)J/psi between 3.8 and 5.5 GeV/c(2) is measured using a 548 fb(-1) data sample collected on or near the Upsilon(4S) resonance with the Belle detector at KEKB. A peak near 4.25 GeV/c(2), corresponding to the so called Y(4260), is observed. In addition, there is another cluster of events at around 4.05 GeV/c(2). A fit using two interfering Breit-Wigner shapes describes the data better than one that uses only the Y(4260), especially for the lower-mass side of the 4.25 GeV enhancement. |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ | |