Search for invisible decays of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="normal">Λ</mml:mi></mml:math> baryon
نویسندگان
چکیده
A search for invisible decays of the $\Lambda$ baryon is carried out in process $J/\psi\to\Lambda\bar{\Lambda}$ based on $(1.0087\pm0.0044)\times10^{10}$ $J/\psi$ events collected with BESIII detector located at BEPCII storage ring. No signals are found baryon, and upper limit branching fraction determined to be $7.4 \times 10^{-5}$ 90% confidence level. This first baryons; such searches will play an important role constraining dark sector models related asymmetry.
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ژورنال
عنوان ژورنال: Physical review
سال: 2022
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevd.105.l071101