Measurement of the absolute branching fraction of the inclusive decay 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mover accent="true"><mml:mi mathvariant="normal">Λ</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover><mml:mi>c</mml:mi><mml:mo>−</mml:mo></mml:msubsup><mml:mo stretchy="false">→</mml:mo><mml:mover accent="true"><mml:mi>n</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover><mml:mo>+</mml:mo><mml:mi>X</mml:mi></mml:math>

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doi:10.1103/physrevd.108.l031101

Phys. Rev. D

2023

DOI: 10.1103/physrevd.108.l031101

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Measurement of the absolute branching fraction of the inclusive decay Λ¯c−→n¯+X

M. Ablikim¹,

М. Н. Ачасов²,

P. Adlarson³

et al.

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Cited by 4 publications

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“…However, the measured branching fraction B(Λ + c → nπ + ) = (6.6 ± 1.3) × 10 −4 differs from the majority of the theoretical predictions [8,9,[17][18][19][20][21], which motivates further efforts in both experiment and theory to further understand the nonfactorization contribution. According to recent constraints provided by the reported branching fraction of the inclusive decay Λ + c → n + X [22], there is a large room to probe experimentally for decays with a neutron in the final state, including the Λ + c decays to Σ − , as Σ − → nπ − almost saturates the branching fraction. At present, CS processes involving the lighter baryons (p [23,24], n [22], Λ [7,25]) or Σ +/0 hyperon [25,26]) from Λ + c decays have already been confirmed and studied extensively in experiment.…”

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“…According to recent constraints provided by the reported branching fraction of the inclusive decay Λ + c → n + X [22], there is a large room to probe experimentally for decays with a neutron in the final state, including the Λ + c decays to Σ − , as Σ − → nπ − almost saturates the branching fraction. At present, CS processes involving the lighter baryons (p [23,24], n [22], Λ [7,25]) or Σ +/0 hyperon [25,26]) from Λ + c decays have already been confirmed and studied extensively in experiment. However, no CS decays with a Σ − have been observed.…”

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Observations of the Cabibbo-Suppressed decays , and the Cabibbo-Favored decay *

et al. 2023

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Using electron-positron annihilation data samples corresponding to an integrated luminosity of 4.5\,\unit{fb}$^{-1}$, collected by the BESIII detector in the energy region between $4600~\mev$ and $4699~\mev$, we report the first observations of the Cabibbo-suppressed decays $\Lambda_c^+\to n\pi^+\pi^0$, $\Lambda_c^+\to n\pi^+\pi^-\pi^+$, and the Cabibbo-favored decay $\Lambda_c^+\to nK^-\pi^+\pi^+$ with statistical significances of $7.9\sigma$, $7.8\sigma$, and $>10\sigma$, respectively. The branching fractions of these decays are measured to be $\mathcal{B}(\Lambda_{c}^{+}\rightarrow n\pi^{+}\pi^{0})=(0.64\pm0.09\pm0.02)\%$, $\mathcal{B}(\Lambda_{c}^{+}\rightarrow n\pi^{+}\pi^{-}\pi^{+})=(0.45\pm0.07\pm0.03)\%$, and $\mathcal{B}(\Lambda_{c}^{+}\rightarrow nK^{-}\pi^{+}\pi^{+})=(1.90\pm0.08\pm0.09)\%$, where the first uncertainties are statistical and the second are systematic. We find that the branching fraction of the decay $\Lambda_{c}^{+}\rightarrow n\pi^{+}\pi^{0}$ is about one order of magnitude higher than that of $\Lambda_{c}^{+}\rightarrow n\pi^{+}$. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

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Observations of the Cabibbo-Suppressed decays , and the Cabibbo-Favored decay *

et al. 2023

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Λc semileptonic decays

Zhang,

Qiao

2023

Phys. Rev. D

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First observation of the decay Λc+→nKS0π+π0

Ablikim,

Achasov,

Adlarson

et al. 2024

Phys. Rev. D

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Measurement of the absolute branching fraction of the inclusive decay Λ¯c−→n¯+X

Cited by 4 publications

References 25 publications

Observations of the Cabibbo-Suppressed decays , and the Cabibbo-Favored decay *

Observations of the Cabibbo-Suppressed decays , and the Cabibbo-Favored decay *

Λc semileptonic decays

First observation of the decay Λc+→nKS0π+π0

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