Branching fraction measurements of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>χ</mml:mi><mml:mrow><mml:mi>c</mml:mi><mml:mn>0</mml:mn></mml:mrow></mml:msub></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>χ</mml:mi><mml:mrow><mml:mi>c</mml:mi><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math>to<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>η</mml:mi><mml:mi>η</mml:mi></mml:math>
M. Ablikim(Institute of High Energy Physics), M. N. Achasov(Siberian Branch of the Russian Academy of Sciences), L. An(Guangxi University), Q. An(University of Science and Technology of China), Zhenghua An(Institute of High Energy Physics), J. Z. Bai(Institute of High Energy Physics), Y. Ban(Peking University), N. Berger(Institute of High Energy Physics), J. M. Bian(Institute of High Energy Physics), I. Boyko(Joint Institute for Nuclear Research), R. A. Briere(Carnegie Mellon University), V. Bytev(Joint Institute for Nuclear Research), X. Cai(Institute of High Energy Physics), G. F. Cao(Institute of High Energy Physics), X. X. Cao(Institute of High Energy Physics), J. F. Chang(Institute of High Energy Physics), G. Chelkov(Joint Institute for Nuclear Research), G. Chen(Institute of High Energy Physics), H. S. Chen(Institute of High Energy Physics), Jiawei Chen(Institute of High Energy Physics), Longfei Chen(Institute of High Energy Physics), M. L. Chen(Institute of High Energy Physics), P. Chen(Institute of High Energy Physics), S. J. Chen(Nanjing University), Y. B. Chen(Institute of High Energy Physics), Y. P. Chu(Institute of High Energy Physics), D. Cronin-Hennessy(University of Minnesota), H. L. Dai(Institute of High Energy Physics), J. P. Dai(Institute of High Energy Physics), D. Dedovich(Joint Institute for Nuclear Research), Z. Y. Deng(Institute of High Energy Physics), I. Denysenko(Joint Institute for Nuclear Research), M. Destefanis(University of Turin), Y. Ding(Liaoning University), L. Y. Dong(Institute of High Energy Physics), M. Y. Dong(Institute of High Energy Physics), S. X. Du(Zhengzhou University), Mai-Ying Duan(Shanxi University), J. Fang(Institute of High Energy Physics), C. Q. Feng(University of Science and Technology of China), C. D. Fu(Institute of High Energy Physics), J. Fu(Nanjing University), Y. Gao(Tsinghua University), C. Geng(University of Science and Technology of China), K. Goetzen(GSI Helmholtz Centre for Heavy Ion Research), W. X. Gong(Institute of High Energy Physics), M. Greco(University of Turin), S. V. Grishin(Joint Institute for Nuclear Research), Y. T. Gu(Guangxi University), A. Q. Guo(Nankai University), L. B. Guo(Nanjing Normal University), Y. P. Guo(Nankai University), S. Han(Nanjing Normal University), F. A. Harris(University of Hawaiʻi at Mānoa), K. L. He(Institute of High Energy Physics), M. He(Institute of High Energy Physics), Z. Y. He(Nankai University), Y. K. Heng(Institute of High Energy Physics), Z. L. Hou(Institute of High Energy Physics), H. M. Hu(Institute of High Energy Physics), J. F. Hu(University of Chinese Academy of Sciences), J. F. Hu(Institute of High Energy Physics), X. Hu(Nanjing University), Bin Huang(Institute of High Energy Physics), G. M. Huang(Central China Normal University), J. S. Huang(Henan Normal University), X. T. Huang(Shandong University), Y. Huang(Institute of High Energy Physics), C. S. Ji(University of Science and Technology of China), Q. P. Ji(Institute of High Energy Physics), X. B. Ji(Institute of High Energy Physics), X. L. Ji(Institute of High Energy Physics), Lu Jia(Institute of High Energy Physics), Lijun Jiang(Institute of High Energy Physics), X. S. Jiang(Institute of High Energy Physics), J. B. Jiao(Shandong University), D. P. Jin(Institute of High Energy Physics), S. Jin(Institute of High Energy Physics), S. Komamiya(The University of Tokyo), W. Kuehn, J. S. Lange, J. K. C. Leung(University of Hong Kong), Cheng Li(University of Science and Technology of China), Cui Li(University of Science and Technology of China), D. M. Li(Zhengzhou University), F. Li(Institute of High Energy Physics), G. Li(Institute of High Energy Physics), H. B. Li(Institute of High Energy Physics), J. Li(Institute of High Energy Physics), J. C. Li(Institute of High Energy Physics), Lei Li(Institute of High Energy Physics), Lu Li(Institute of High Energy Physics), Q. J. Li(Institute of High Energy Physics), W. D. Li(Institute of High Energy Physics), W. G. Li(Institute of High Energy Physics), X. L. Li(Shandong University), X. N. Li(Shandong University), X. Q. Li(Shandong University), X. R. Li(Shandong University), Y.-X. Li(Zhengzhou University), Z. B. Li(Sun Yat-sen University), H. Liang(University of Science and Technology of China), T. R. Liang(Nankai University), Y. T. Liang(Sichuan University), Y. F. Liang(Sichuan University), G. R. Liao(Guangxi Normal University), X. T. Liao(Institute of High Energy Physics), B. J. Liu(Chinese University of Hong Kong), C. L. Liu(Institute of High Energy Physics), C. X. Liu(Institute of High Energy Physics), C. Y. Liu(Institute of High Energy Physics), F. H. Liu(Shanxi University), Fang Liu(Shanxi University), Feng Liu(Shanxi University), G. C. Liu(Institute of High Energy Physics), H. Liu(Institute of High Energy Physics), H. B. Liu(Institute of High Energy Physics), H. M. Liu(Institute of High Energy Physics), H. W. Liu(Institute of High Energy Physics), J. Liu(Wuhan University), J. P. Liu(Wuhan University), K. Liu(Liaoning University), K. Y. Liu(Liaoning University), Q. Liu(University of Hawaiʻi at Mānoa), Shanying Liu(University of Science and Technology of China), X. H. Liu(Institute of High Energy Physics), Y. B. Liu(University of Science and Technology of China), Y. F. Liu(University of Science and Technology of China), Y. W. Liu(University of Science and Technology of China), Yong Liu(University of Science and Technology of China), Z. A. Liu(Institute of High Energy Physics), G. R. Lu(Henan Normal University), J. G. Lu(Institute of High Energy Physics), Q. W. Lu(Shanxi University), Xujie Lü(University of Chinese Academy of Sciences), Y. P. Lu(Institute of High Energy Physics), C. L. Luo(Nanjing Normal University), M. X. Luo(Zhejiang University), T. Luo(Institute of High Energy Physics), X. L. Luo(Institute of High Energy Physics), C. L.(University of Chinese Academy of Sciences), F. C.(Liaoning University), H. L.(Institute of High Energy Physics), Q. M.(Institute of High Energy Physics), Xiang Ma(Institute of High Energy Physics), X. Y.(Institute of High Energy Physics), M. Maggiora(University of Turin), Y. J. Mao(Peking University), Z. P. Mao(Institute of High Energy Physics), J. Min(Institute of High Energy Physics), X. H. Mo(Institute of High Energy Physics), N. Yu. Muchnoi(Siberian Branch of the Russian Academy of Sciences), Y. Nefedov(Joint Institute for Nuclear Research), F. P. Ning(Shanxi University), S. L. Olsen(Seoul National University), Q. Ouyang(Institute of High Energy Physics), M. Pelizaeus(Ruhr University Bochum), Κ. Peters(GSI Helmholtz Centre for Heavy Ion Research), J. L. Ping(Nanjing Normal University), R. G. Ping(Institute of High Energy Physics), R. Poling(University of Minnesota), C. S. J. Pun(University of Hong Kong), M. Qi(Nanjing University), S. Qian(Institute of High Energy Physics), C. F. Qiao(University of Chinese Academy of Sciences), J. F. Qiu(Institute of High Energy Physics), G. Rong(Institute of High Energy Physics), X. D. Ruan(Guangxi University), A. Sarantsev(Joint Institute for Nuclear Research), M. Shao(University of Science and Technology of China), C. P. Shen(University of Hawaiʻi at Mānoa), X. Y. Shen(Institute of High Energy Physics), H. Y. Sheng(Institute of High Energy Physics), S. Sonoda(The University of Tokyo), S. Spataro(University of Turin), B. Spruck, D. H. Sun(Institute of High Energy Physics), G. X. Sun(Institute of High Energy Physics), J. F. Sun(Henan Normal University), S. S. Sun(Institute of High Energy Physics), X. Sun(Institute of High Energy Physics), Y. J. Sun(University of Science and Technology of China), Y. Z. Sun(University of Science and Technology of China), Z. J. Sun(University of Science and Technology of China), Z. T. Sun(University of Science and Technology of China), C. J. Tang(Sichuan University), X. Tang(Guangxi Normal University), Xiaowei Tang(Guangxi Normal University), H. L. Tian(Institute of High Energy Physics), D. Toth(University of Minnesota), G. S. Varner(University of Hawaiʻi at Mānoa), X. Wan(Institute of High Energy Physics), Bo Wang(Peking University), J. K. Wang(Institute of High Energy Physics), K. Wang(Institute of High Energy Physics), L. L. Wang(Institute of High Energy Physics), L. S. Wang(Institute of High Energy Physics), P. Wang(Institute of High Energy Physics), P. L. Wang(Institute of High Energy Physics), Q. Wang(Institute of High Energy Physics), S. G. Wang(Peking University), X. D. Wang(University of Science and Technology of China), X. L. Wang(University of Science and Technology of China), Y. D. Wang(University of Science and Technology of China), Y. F. Wang(University of Science and Technology of China), Y. Q. Wang(University of Science and Technology of China), Z. Wang(Institute of High Energy Physics), Z. G. Wang(Institute of High Energy Physics), Z. Y. Wang(Institute of High Energy Physics), D. H. Wei(Guangxi Normal University), S. P. Wen(Institute of High Energy Physics), U. Wiedner(Ruhr University Bochum), L. H. Wu(Institute of High Energy Physics), Nengyou Wu(Institute of High Energy Physics), Wei Wu(Liaoning University), Y. M. Wu(Institute of High Energy Physics), Z. Wu(Institute of High Energy Physics), Z. J. Xiao(Nanjing Normal University), Y. G. Xie(Institute of High Energy Physics), G. F. Xu(Peking University), G. Xu(Peking University), Heng Xu(Institute of High Energy Physics), Min Xu(University of Science and Technology of China), Ming Xu(University of Science and Technology of China), X. P. Xu(Central China Normal University), Y. C. Xu(Nankai University), Z. Xu(University of Science and Technology of China), Z.L. Xue(University of Science and Technology of China), L. Yan(University of Science and Technology of China), W. B. Yan(University of Science and Technology of China), Y. H. Yan(Hunan University), H. X. Yang(Institute of High Energy Physics), Mingzhu Yang(Institute of High Energy Physics), Ping Yang(Nankai University), S. Yang(Institute of High Energy Physics), Y. Yang(Guangxi Normal University), M. Ye(Institute of High Energy Physics), M. H. Ye(Institute of High Energy Physics), B. X. Yu(Institute of High Energy Physics), C. X. Yu(Nankai University), L. Yu(Central China Normal University), C. Z. Yuan(Institute of High Energy Physics), Y. Yuan(Institute of High Energy Physics), Y. Zeng(Hunan University), B. X. Zhang(Institute of High Energy Physics), B. Y. Zhang(Institute of High Energy Physics), C. C. Zhang(Institute of High Energy Physics), D. H. Zhang(Institute of High Energy Physics), H. H. Zhang(Sun Yat-sen University), H. Y. Zhang(Sun Yat-sen University), J. W. Zhang(Institute of High Energy Physics), J. Y. Zhang(Institute of High Energy Physics), J. Z. Zhang(Institute of High Energy Physics), L. Zhang(Nanjing University), S. H. Zhang(Institute of High Energy Physics), X. Y. Zhang(Shandong University), Y. Zhang(Institute of High Energy Physics), Y. H. Zhang(Institute of High Energy Physics), Z. P. Zhang(University of Science and Technology of China), Cong Zhao(University of Science and Technology of China), H. S. Zhao(Institute of High Energy Physics), J. W. Zhao(University of Science and Technology of China), Jingwei Zhao(University of Science and Technology of China), Lei Zhao(University of Science and Technology of China), Q. Zhao(University of Science and Technology of China), M. G. Zhao(Nankai University), Q. Zhao(Institute of High Energy Physics), Q. Zhao(Zhengzhou University), T. C. Zhao(University of Washington), X. Zhao(Nanjing University), Y. B. Zhao(Institute of High Energy Physics), Z. Zhao(University of Science and Technology of China), A. Zhemchugov(Joint Institute for Nuclear Research), B. Zheng(Institute of High Energy Physics), J. P. Zheng(Institute of High Energy Physics), Y. Zheng(University of Chinese Academy of Sciences), Z. P. Zheng(Institute of High Energy Physics), B. Zhong(Nanjing Normal University), J. Zhong(Ruhr University Bochum), Liping Zhou(Institute of High Energy Physics), Zhu Zhou(Institute of High Energy Physics), C. Zhu(Institute of High Energy Physics), K. J. Zhu(Institute of High Energy Physics), K. J. Zhu(Institute of High Energy Physics), Q. M. Zhu(Institute of High Energy Physics), X. Zhu(Institute of High Energy Physics), Y. S. Zhu(Institute of High Energy Physics), Z. A. Zhu(Institute of High Energy Physics), J. Zhuang(Institute of High Energy Physics), B. S. Zou(Institute of High Energy Physics), J. H. Zou(Institute of High Energy Physics), J. X. Zuo(Institute of High Energy Physics), P. Zweber(University of Minnesota)
Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology
March 11, 2010
Cited by 165Open Access
Abstract
Using a sample of $1.06\ifmmode\times\else\texttimes\fi{}{10}^{8}$ ${\ensuremath{\psi}}^{\ensuremath{'}}$ decays collected by the BESIII detector, ${\ensuremath{\chi}}_{c0}$ and ${\ensuremath{\chi}}_{c2}$ decays into ${\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}$ and $\ensuremath{\eta}\ensuremath{\eta}$ are studied. The branching fraction results are $\mathrm{Br}({\ensuremath{\chi}}_{c0}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0})=(3.23\ifmmode\pm\else\textpm\fi{}0.03\ifmmode\pm\else\textpm\fi{}0.23\ifmmode\pm\else\textpm\fi{}0.14)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$, $\mathrm{Br}({\ensuremath{\chi}}_{c2}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0})=(8.8\ifmmode\pm\else\textpm\fi{}0.2\ifmmode\pm\else\textpm\fi{}0.6\ifmmode\pm\else\textpm\fi{}0.4)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$, $\mathrm{Br}({\ensuremath{\chi}}_{c0}\ensuremath{\rightarrow}\ensuremath{\eta}\ensuremath{\eta})=(3.44\ifmmode\pm\else\textpm\fi{}0.10\ifmmode\pm\else\textpm\fi{}0.24\ifmmode\pm\else\textpm\fi{}0.2)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$, and $\mathrm{Br}({\ensuremath{\chi}}_{c2}\ensuremath{\rightarrow}\ensuremath{\eta}\ensuremath{\eta})=(6.5\ifmmode\pm\else\textpm\fi{}0.4\ifmmode\pm\else\textpm\fi{}0.5\ifmmode\pm\else\textpm\fi{}0.3)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$, where the uncertainties are statistical, systematic due to this measurement, and systematic due to the branching fractions of ${\ensuremath{\psi}}^{\ensuremath{'}}\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\chi}}_{cJ}$. The results provide information on the decay mechanism of ${\ensuremath{\chi}}_{c}$ states into pseudoscalars.
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