Speaker
Yunxuan Song
(Peking University , University of Chinese Academy of Sciences)
Description
BESIII has collected data sets of 448.2 M $\psi(3686)$ events and 10 B $J/\psi$ events. The huge clean data samples provide an excellent opportunity to search for new physics. We report the search for decay $J/\psi\to \gamma + \rm invisible$, which is predicted by next-to-minimal supersymmetric model. Without significant signal found, we gave around 6.2 times better UL than previous CLEO-c’s results. In addition, we report the preliminary result of the first search for the invisible decay of $\Lambda$. This invisible decay is predicted by mirror matter model which could explain the $4\sigma$ discrepancy in neutron lifetime measurement results between the beam method and the bottle method.
| Please choose the session this abstract belongs to | Particle physics |
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Primary author
Yunxuan Song
(Peking University , University of Chinese Academy of Sciences)
