Branching fractions for {psi}(2S){r_arrow}{gamma}{eta}{sup {prime}} and {gamma}{eta}

Journal Article · Sat Oct 31 23:00:00 EST 1998 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.58.097101· OSTI ID:298616

Bai, J Z; Bian, J G; Chai, Z W; Chen, G P; Chen, J C; Chen, Y; Chen, Y B; Chen, Y Q; Cheng, B S; Cui, X Z; Ding, H L; Ding, L Y; Dong, L Y; Du, Z Z; Feng, S; Gao, C S; Gao, M L; Gao, S Q; Gu, J H; Gu, S D ; Gu, W X; Gu, Y F; Guo, Y N; Han, S W; Han, Y; He, J; He, J T; Hu, G Y; Hu, H M; Hu, J L; Hu, Q H; Hu, T; Hu, X Q; Huang, J D; Huang, Y Z; Jiang, C H; Jin, Y; Ke, Z J; Lai, Y F; Lang, P F; Li, C G; Li, D; Li, H B; Li, J; Li, P Q; Li, R B; Li, W; Li, W D; Li, W G; Li, X H; Li, X N; Liu, H M; Liu, J; Liu, J H; Liu, R G; Liu, Y; Lu, F; Lu, J G; Lu, J Y; Lu, L C; Luo, C H; Ma, A M; Ma, E C; Ma, J M; Mao, H S; Mao, Z P; Meng, X C; Nie, J; Qi, N D; Qi, X R; Qiu, J F; Qu, Y H; Que, Y K; Rong, G; Shao, Y Y; Shen, B W; Shen, D L; Shen, H; Shen, X Y; Sheng, H Y; Shi, H Z; Song, X F; Sun, F; Sun, H S; Tang, S Q; Tong, G L; Wang, F; Wang, L S; Wang, L Z; Wang, M; Wang, M; Wang, P; Wang, P L; Wang, S M; Wang, T J; Wang, Y Y; Wei, C L; Wu, Y G; Xi, D M; Xia, X M; Xie, P P; Xie, Y; Xie, Y H; Xiong, W J; Xu, C C; Xu, G F; Xue, S T; Yan, J; Yan, W G; Yang, C M; Yang, C Y; Yang, J; Yang, X F; Ye, M H; Yi, K; Yu, C S; Yu, C X; Yu, Z Q; Yu, Z T; Yuan, C Z; Yuan, Y; Zhang, B Y; Zhang, C C; Zhang, D H; Zhang, D; Zhang, H L; Zhang, J; Zhang, J L; Zhang, J W; Zhang, L S; Zhang, Q J; Zhang, S Q; Zhang, Y; Zhang, Y Y; Zhao, D X; Zhao, H W; Zhao, J W; Zhao, M; Zhao, W R; Zhao, Z G; Zheng, J P; Zheng, L S; Zheng, Z P; Zhou, G P; Zhou, H S; Zhou, L; Zhu, Q M; Zhu, Y C; Zhu, Y S; Zhuang, B A ^[1]; Hitlin, D G; Kelsey, M H; Oyang, J; Panetta, J; Porter, F; Weaver, M ^[2]; Chen, J; Malchow, R; Toki, W; Yang, W ^[3]

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1. Institute of High Energy Physics, Beijing 100039, Peoples Republic of (China)
2. California Institute of Technology, Pasadena, California 91125 (United States)
3. Colorado State University, Fort Collins, Colorado 80523 (United States)

We report first measurements of the branching fractions B({psi}{sub 2S}{r_arrow}{gamma}{eta}{sup {prime}})=(1.54{plus_minus}0.31{plus_minus}0.20){times}10{sup {minus}4} and B({psi}{sub 2S}{r_arrow}{gamma}{eta})=(0.53{plus_minus}0.31{plus_minus}0.08){times}10{sup {minus}4}. The {psi}(2S){r_arrow}{gamma}{eta}{sup {prime}} result is consistent with expectations of a model that considers the possibility of {eta}{sup {prime}}-{eta}{sub c}(2S) mixing. The ratio of the {psi}(2S){r_arrow}{gamma}{eta}{sup {prime}} and {psi}(2S){r_arrow}{gamma}{eta} rates is used to determine the pseudoscalar octet-singlet mixing angle. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 298616
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 9 Vol. 58; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BOUND STATE
BRANCHING RATIO
CHARM PARTICLES
CHARMONIUM
ETA MESONS
PARTICLE DECAY
QUARKS
RADIATIVE DECAY