ITA
ENG

Partial wave analysis of J/Psi ->gamma(eta pi(+)pi(-))

Authors

Bai, JZ Ban, Y Bian, JG Chen, GP Cheng, HF Chen, JC Chen, Y Chen, YB Chen, YQ Cheng, BS Cui, XZ Ding, HL Dong, LY Du, ZZ Gao, CS Gao, ML Gao, SQ Gu, JH Gu, SD Gu, WX Gu, YF Guo, YN Han, SW Han, Y He, J He, JT He, KL He, M Hu, GY Hu, HM Hu, JL Hu, QH Hu, T Hu, XQ Huang, YZ Jiang, CH Jin, Y Ke, ZJ Lai, YF Lang, PF Li, CG Li, D Li, HB Li, J Li, PQ Li, RB Li, W Li, WG Li, XH Li, XN Liu, HM Liu, J Liu, RG Liu, Y Lu, F Lu, JG Luo, XL Ma, EC Ma, JM Mao, HS Mao, ZP Meng, XC Nie, J Qi, ND Qi, XR Qian, CD Qiu, JF Qu, YH Que, YK Rong, G Shao, YY Shen, BW Shen, DL Shen, H Shen, XY Sheng, HY Shi, HZ Song, XF Sun, F Sun, HS Sun, Y Sun, YZ Tang, SQ Tong, GL Wang, F Wang, LS Wang, LZ Wang, M Wang, P Wang, PL Wang, SM Wang, TJ Wang, YY Wei, CL 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, J 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, CC Zhang, DH Zhang, DH Zhang, HL Zhang, J Zhang, JW Zhang, LS Zhang, QJ Zhang, SQ Zhang, XY Zhang, YY Zhao, DX Zhao, HW 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 Bugg, DV Sarantsev, AV Zou, BS

Citation

Jz. Bai et al., Partial wave analysis of J/Psi ->gamma(eta pi(+)pi(-)), PHYS LETT B, 446(3-4), 1999, pp. 356-362

Citations number

Categorie Soggetti

Physics

Journal title

PHYSICS LETTERS B

ISSN journal

03702693 → ACNP

Volume

446

Issue

3-4

Year of publication

1999

Pages

356 - 362

Database

ISI

SICI code

0370-2693(19990128)446:3-4<356:PWAOJ->2.0.ZU;2-6

Abstract

A partial wave analysis of BES J/psi --> gamma(eta pi(+)pi(-)) data has bee n performed in the mass region 1.1 to 2.0 GeV. A peak is observed due to et a(1440) in the eta pi(+)pi(-) invariant mass distribution; J(P) = 0(-) is p referred over li. Its mass is M = 1385 +/- 7 MeV and it decays into both et a sigma and a(0)(980)pi, with BR[a(0)(980)pi, a(0) --> eta pi/eta sigma] = 0.70 +/- 0.12(stat) +/- 0.20(syst). Destructive interference between the tw o decay modes is observed. In addition, in the higher eta pi(+)pi(-) mass r egion, there is a definite 2(-+) signal, with M = 1840 +/- 15 MeV and Gamma = 170 +/- 40 MeV and an additional 0(-+) signal at 1760 +/- 35 MeV. We als o find a possible contribution from a 1(++) signal decaying dominantly thro ugh a(0)(980)pi; its mass and width are fitted to be M = 1505 +/- 20 MeV an d Gamma = 130(-20)(+50) MeV. (C) 1999 Elsevier Science B.V. All rights rese rved.