Measurement of the branching fractions of the singly Cabibbo-suppressed decays ${\Lambda }_c^{+}\to p\eta$ and ${\Lambda }_c^{+}\to p\omega$

Abstract

Based on 4.5 $\mbox{fb$^{-1}$}$ $e^{+}{e}^{-}$ collision data collected with BESIII detector at seven energy points between 4.600 and 4.699 GeV, the branching fractions for ${\Lambda }_c^{+}\to p\eta$ and ${\Lambda }_c^{+}\to p\omega$ were measured by means of single-tag method. The branching fractions of ${\Lambda }_c^{+}\to p\eta$ and ${\Lambda }_c^{+}\to p\omega$ are determined to be $(1.57\pm 0.11_{\mathrm{stat}}\pm 0.04_{\mathrm{syst}})\times 10^{-3}$ and $(1.11\pm 0.20_{\mathrm{stat}}\pm 0.07_{\mathrm{syst}})\times 10^{-3}$, with a statistical significance of greater than 10 $\sigma$ and 5.7 $\sigma$, respectively. These results are consistent with the previous measurements by BESIII, LHCb and Belle, and the result of ${\Lambda }_c^{+}\to p\eta$ is the most precise to date.

24 pages, 4 figures

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Cited by in corpus (5)

• Topological amplitudes of charmed baryon decays in the $SU(3{)}_F$ limit
• Evidence of the Singly Cabibbo Suppressed decay ${\Lambda }_c^{+}\to p{\pi }^0$
• Observation of the Singly Cabibbo-Suppressed Decay ${\Lambda }_c^{+}\to p{\pi }^0$
• Prospects for $P$ and $CP$ violation in ${\Lambda }_c^{+}$ decays with polarized beam at Super Tau-Charm Facility
• Helicity amplitude and branching fraction measurement of ${\chi }_{cJ}\to \Lambda \bar{\Lambda }$