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| Home > Publications database > Measurements of the branching fractions of $\Lambda_c^{+} \to p \eta$ and $\Lambda_c^{+} \to p \pi^0$ decays at Belle |
| Journal Article | PUBDB-2021-02600 |
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2021
Inst.
Woodbury, NY
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Please use a persistent id in citations: doi:10.1103/PhysRevD.103.072004 doi:10.3204/PUBDB-2021-02600
Report No.: Belle Preprint 2021-02; KEK Preprint 2020-42; arXiv:2102.12226
Abstract: We report measurements of the branching fractions of singly Cabibbo-suppressed decays $\Lambda_c^+ \to p \eta$ and $\Lambda_c^+ \to p \pi^0$ using the full Belle data sample corresponding to an integrated luminosity of 980.6 $\rm fb^{-1}$. The data were collected by the Belle detector at the KEKB $e^{+}$$e^{-}$ asymmetric-energy collider. A clear $\Lambda_c^+$ signal is seen in the invariant mass distribution of $p \eta$. The signal yield of the $\Lambda_c^+ \to p \eta$ process is $7734 \pm 263$; from this, we measure the ratio of branching fractions ${\cal B}(\Lambda_c^+ \to p \eta)/{\cal B}(\Lambda_c^+ \to p K^- \pi^+) = (2.258 \pm 0. 077(\rm stat. ) \pm 0.136(\rm syst. ))\times 10^{-2}$, from which we infer the branching fraction ${\cal B}(\Lambda_c^+ \to p \eta) = (1.42 \pm 0.05(\rm stat.) \pm 0.11(\rm syst.)) \times 10^{-3}$. In addition, no significant signal for $\Lambda_c^+ \to p \pi^0$ is found so an upper limit on the branching fraction of ${\cal B}(\Lambda_c^+ \to p \pi^0)<8.0 \times 10^{-5}$ at 90% credibility level is set, more than three times better than the best current upper limit.
Keyword(s): electron positron: annihilation ; electron positron: colliding beams ; Lambda/c+: hadronic decay ; Lambda/c+: rare decay ; Lambda/c+: branching ratio: measured ; Lambda/c+: branching ratio: upper limit ; branching ratio: ratio: measured ; Lambda/c+: yield ; BELLE ; mass spectrum: (p eta) ; KEK-B ; experimental results ; Lambda/c+ --> p eta ; Lambda/c+ --> p pi0 ; Particle Physics Experiments
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Preprint
Measurements of the branching fractions of $\Lambda_c^+ \to p \eta$ and $\Lambda_c^+ \to p \pi^0$ decays at Belle
1-9 (2021) [10.3204/PUBDB-2021-01733]
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