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Search for the invisible decay of J/psi in psi(2S) --> pi(+)pi(-) J/psi |
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| Authors: | Ablikim M Bai J Z Ban Y Cai X Chen H F Chen H S Chen H X Chen J C Chen Jin Chen Y B Chu Y P Dai Y S Diao L Y Deng Z Y Dong Q F Du S X Fang J Fang S S Fu C D Gao C S Gao Y N Gu S D Gu Y T Guo Y N Guo Z J Harris F A He K L He M Heng Y K Hou J Hu H M Hu J H Hu T Huang X T Ji X B Jiang X S Jiang X Y Jiao J B Jin D P Jin S Jin Y Lai Y F Li G Li H B Li J Li R Y Li S M Li W D Li W G Li X L Li X N Li X Q Liang Y F Liao H B Liu B J Liu C X Liu F Liu Fang Liu H H Liu H M Liu J Liu J B Liu J P Liu Jian Liu Q Liu R G Liu Z A Lou Y C Lu F Lu G R Lu J G Luo C L Ma F C Ma H L Ma L L Ma Q M Mao Z P Mo X H |
| Institution: | Institute of High Energy Physics, Beijing, PR China. |
| Abstract: | Using psi(2S) --> pi(+)pi(-) J/psi events in a sample of 14.0 x 10(6) psi(2S) decays collected with the BES-II detector, a search for the decay of the J/psi to invisible final states is performed. No signal is found, and an upper limit at the 90% confidence level is determined to be 1.2 x 10(-2) for the ratio B(J/psi --> invisible)/B(J/psi-->mu(+)mu(-)). This is the first search for J/psi decays to invisible final states. |
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