标题:Measurements of the Mass and Width of the eta(c) Using the Decay psi (3686) -> gamma eta(c)
作者:Ablikim, M.; Achasov, M. N.; Alberto, D.; Ambrose, D. J.; An, F. F.; An, Q.; An, Z. H.; Bai, J. Z.; Ferroli, R. B.; Ban, Y.; Becke 更多
作者机构:[Ablikim, M.; An, F. F.; An, Z. H.; Bai, J. Z.; Berger, N.; Cai, X.; Cao, G. F.; Chang, J. F.; Chen, G.; Chen, H. S.; Chen, H. X.; Chen, J. C.; Chen, 更多
通讯作者:Ablikim, M
通讯作者地址:[Ablikim, M]Inst High Energy Phys, Beijing 100049, Peoples R China.
来源:PHYSICAL REVIEW LETTERS
出版年:2012
卷:108
期:22
DOI:10.1103/PhysRevLett.108.222002
摘要:The mass and width of the lowest-lying S-wave spin singlet charmonium state, the eta(c), are measured using a data sample of 1: 06 x 10(8) psi (3686) decays collected with the BESIII detector at the BEPCII storage ring. We use a model that incorporates full interference between the signal reaction, psi(3686) -> gamma eta(c), and a nonresonant radiative background to describe the line shape of the eta(c) successfully. We measure the n(c) mass to be 2984.3 +/- 0.6 +/- 0.6 MeV/c(2) and the total width to be 32.0 +/- 1.2 +/- 1.0 MeV, where the first errors are statistical and the second are systematic.
收录类别:SCIE
WOS核心被引频次:25
资源类型:期刊论文
TOP