Nonleptonic two-body weak decays of charmed baryons
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866913212043100160 |
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| author | Liu, Chia-Wei |
| author_facet | Liu, Chia-Wei |
| contents | We analyze the two-body nonleptonic weak decays of charmed baryons, employing the pole approximation in tandem with the $SU(3)_F$ symmetry. We are able to make novel predictions for decay channels of $Ω_c^0 \to {\bf B}_n P$ and ${\bf B}_{cc}\to {\bf B}_c^{A,S} P$ based on the experimental data of ${\bf B}_c^A \to {\bf B}_n P$. Here, ${\bf B}_n$, ${\bf B}_{c}^A$, ${\bf B}_c^S$ and ${\bf B}_{cc}$ are the low-lying octet, antitriplet charmed, sextet charmed and doubly charmed baryons, respectively, and $P$ is the pseudoscalar meson. Our findings reveal that the fitted effective Wilson coefficient ${\cal C}_+=0.469$ is notably smaller than the naive expectation, and the low-lying pole approximation fails to account for ${\cal B}(Λ_c^+ \to n π^+ , Ξ^0 K^+)$, despite consistencies with the soft-meson limit. We further recommend the decay channel $Ξ_{cc}^+ \to Ξ_c^0 π^+ \to Ξ^- π^+π^+π^+π^-$ for exploring evidence of $Ξ_{cc}^+$, estimating the branching fraction at $(1.1\pm 0.6)\times 10^{-3}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_07754 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Nonleptonic two-body weak decays of charmed baryons Liu, Chia-Wei High Energy Physics - Phenomenology High Energy Physics - Experiment We analyze the two-body nonleptonic weak decays of charmed baryons, employing the pole approximation in tandem with the $SU(3)_F$ symmetry. We are able to make novel predictions for decay channels of $Ω_c^0 \to {\bf B}_n P$ and ${\bf B}_{cc}\to {\bf B}_c^{A,S} P$ based on the experimental data of ${\bf B}_c^A \to {\bf B}_n P$. Here, ${\bf B}_n$, ${\bf B}_{c}^A$, ${\bf B}_c^S$ and ${\bf B}_{cc}$ are the low-lying octet, antitriplet charmed, sextet charmed and doubly charmed baryons, respectively, and $P$ is the pseudoscalar meson. Our findings reveal that the fitted effective Wilson coefficient ${\cal C}_+=0.469$ is notably smaller than the naive expectation, and the low-lying pole approximation fails to account for ${\cal B}(Λ_c^+ \to n π^+ , Ξ^0 K^+)$, despite consistencies with the soft-meson limit. We further recommend the decay channel $Ξ_{cc}^+ \to Ξ_c^0 π^+ \to Ξ^- π^+π^+π^+π^-$ for exploring evidence of $Ξ_{cc}^+$, estimating the branching fraction at $(1.1\pm 0.6)\times 10^{-3}$. |
| title | Nonleptonic two-body weak decays of charmed baryons |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2308.07754 |