psi(2S) -> pi(+) pi(-) J/psi decay distributions - art. no. 032002

Authors
Bai, JZ Ban, Y Bian, JG Blum, I Chen, GP Chen, HF Chen, J Chen, JC Chen, Y Chen, YB Chen, YQ Cheng, BS Cui, XZ Ding, HL Dong, LY Du, ZZ Dunwoodie, W Gao, CS Gao, ML Gao, SQ Gratton, P Gu, JH Gu, SD Gu, WX Gu, YF Guo, ZJ Guo, YN Han, SW Han, Y Harris, FA He, J He, JT He, KL He, M Heng, YK Hitlin, DG Hu, GY Hu, HM Hu, JL Hu, QH Hu, T Hu, XQ Huang, GS Huang, YZ Izen, JM Jiang, CH Jin, Y Jones, BD Ju, X Ke, ZJ Kelsey, MH Kim, BK Kong, D Lai, YF Lang, PF Lankford, A Li, CG Li, D Li, HB Li, J Li, JC Li, PQ Li, RB Li, W Li, WG Li, XH Li, XN Liu, HM Liu, J Liu, RG Liu, Y Lou, XC Lowery, B Lu, F Lu, JG Luo, XL Ma, EC Ma, JM Malchow, R Mao, HS Mao, ZP Meng, XC Nie, J Olsen, SL Oyang, J Paluselli, D Pan, LJ Panetta, J Porter, F Qi, ND Qi, XR Qian, CD Qiu, JF Qu, YH Que, YK Rong, G Schernau, M Shao, YY Shen, BW Shen, DL Shen, H Shen, XY Sheng, HY Shi, HZ Song, XF Standifird, J Sun, F Sun, HS Sun, Y Sun, YZ Tang, SQ Toki, W Tong, GL Varner, GS Wang, F Wang, LS Wang, LZ Wang, M Wang, P Wang, PL Wang, SM Wang, TJ Wang, YY Weaver, M Wei, CL Wu, N Wu, YG Xi, DM Xia, XM Xie, PP Xie, Y Xie, YH Xu, GF Xue, ST Yan, J Yan, WG Yang, CM Yang, CY Yang, HX Yang, J Yang, W Yang, XF Ye, MH Ye, SW Ye, YX Yu, CS Yu, CX Yu, GW Yu, YH Yu, ZQ Yuan, CZ Yuan, Y Zhang, BY Zhang, C Zhang, CC Zhang, DH Zhang, DH Zhang, HL Zhang, J Zhang, JW Zhang, L Zhang, LS Zhang, P Zhang, QJ Zhang, SQ Zhang, XY Zhang, YY Zhao, DX Zhao, HW Zhao, JW Zhao, JW Zhao, M Zhao, WR Zhao, ZG Zheng, JP Zheng, LS Zheng, ZP Zhou, BQ Zhou, GP Zhou, HS Zhou, L Zhu, KJ Zhu, QM Zhu, YC Zhu, YS Zhuang, BA
Citation
Jz. Bai et al., psi(2S) -> pi(+) pi(-) J/psi decay distributions - art. no. 032002, PHYS REV D, 6203(3), 2000, pp. 2002
Citations number
20
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
05562821 → ACNP
Volume
6203
Issue
3
Year of publication
2000
Database
ISI
SICI code
0556-2821(20000801)6203:3<2002:P-PPJD>2.0.ZU;2-W
Abstract
Using a sample of 3.8 M psi(2S) events accumulated with the BES detector, t he process psi(2S) --> pi(+) pi(r)-J/psi is studied. The angular distributi ons are compared with the general decay amplitude analysis of Cahn. We find that the dipion system requires some D wave amplitude, as well as S wave. On the other hand, the J/psi-(pi(+)pi(-)) relative angular momentum is cons istent with being pure S wave. The decay distributions have been fit to hea vy quarkonium models, including the Novikov-Shifman model. This model, whic h is written in terms of the parameter kappa, predicts that D wave pions sh ould be present. We determine kappa = 0.183 +/- 0.002 +/- 0.003 based on th e joint m(pi pi)-cos theta(pi)* distribution. The fraction of D wave amplit ude as a function of m(pi pi) is found to decrease with increasing m(pi pi) , in agreement with the model. We have also fit the Mannel-Yan model, which is another model that allows D wave pions.