Revisiting B̅0 → Λc+ p̅ decay with higher twist corrections
Abstract
We investigate the single-charmed baryonic decays B̅0 → Λc+ p̅ and B̅0 → Λ̅c- p, which receive contributions from both W-emission and W-exchange topologies, within the framework of perturbative QCD (PQCD). Higher-power corrections associated with the hadronic light-cone distribution amplitudes (LCDAs) of both the initial- and final-state hadrons are systematically taken into account. We find that these higher-twist contributions play an important role in baryonic B decays and cannot be neglected. A sizable destructive interference between the W-emission and W-exchange amplitudes is observed, which significantly reduces the predicted branching fraction of B̅0 → Λc+ p̅ and leads to improved agreement with experimental measurements. The doubly Cabibbo-suppressed decay B̅0 → Λ̅c- p is studied for the first time. Its branching fraction is predicted to be of order 10−8, placing it within the reach of future high-luminosity experiments. We further present the first theoretical predictions for the decay asymmetry parameters of both channels, which provide additional observables for testing the underlying decay dynamics and can be confronted with future experimental data.
Versions
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BibTeX
@misc{zou2026revisiting,
title = {{Revisiting $\bar B^0 \rightarrow Λ_c^+ \bar p$ decay with higher twist corrections}},
author = {Zhi-Tian Zou and Ying Li and Zhou Rui},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2607.02876},
eprint = {2607.02876},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2607.02876},
}
RIS
TY - UNPB
TI - Revisiting B̅^0 → Λ_c^+ p̅ decay with higher twist corrections
AU - Zhi-Tian Zou
AU - Ying Li
AU - Zhou Rui
PY - 2026
DA - 2026/11/05
PB - arXiv
DO - 10.48550/arxiv.2607.02876
UR - https://arxiv.org/abs/2607.02876
AB - We investigate the single-charmed baryonic decays B̅^0 → Λ_c^+ p̅ and B̅^0 → Λ̅_c^- p, which receive contributions from both W-emission and W-exchange topologies, within the framework of perturbative QCD (PQCD). Higher-power corrections associated with the hadronic light-cone distribution amplitudes (LCDAs) of both the initial- and final-state hadrons are systematically taken into account. We find that these higher-twist contributions play an important role in baryonic B decays and cannot be neglected. A sizable destructive interference between the W-emission and W-exchange amplitudes is observed, which significantly reduces the predicted branching fraction of B̅^0 → Λ_c^+ p̅ and leads to improved agreement with experimental measurements. The doubly Cabibbo-suppressed decay B̅^0 → Λ̅_c^- p is studied for the first time. Its branching fraction is predicted to be of order 10^−8, placing it within the reach of future high-luminosity experiments. We further present the first theoretical predictions for the decay asymmetry parameters of both channels, which provide additional observables for testing the underlying decay dynamics and can be confronted with future experimental data.
ER -