Published January 1, 2020
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Search for baryon and lepton number violating decays ${D}^{+}\to \overline{\Lambda }\left({\overline{\Sigma }}^{0}\right){e}^{+}$ and ${D}^{+}\to \Lambda \left({\Sigma }^{0}\right){e}^{+}$
Description
Using a $2.93\text{}\text{}{\mathrm{fb}}^{-1}$ data sample of electron-positron collisions taken with the BESIII detector at a center-of-mass energy of 3.773 GeV, which corresponds to $\left(8296±31±64\right)×{10}^{3}{D}^{+}{D}^{-}$ pairs, we search for the baryon and lepton number violating decays ${D}^{+}\to \overline{\Lambda }\left({\overline{\Sigma }}^{0}\right){e}^{+}$ and ${D}^{+}\to \Lambda \left({\Sigma }^{0}\right){e}^{+}$. No obvious signals are found with the current statistics and upper limits on the branching fractions of these four decays are set at the level of ${10}^{-6}$ at 90% confidence level.
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PhysRevD.101.031102.pdf
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