PreprintCC BY 4.0arXiv
Evidence for the semileptonic decay Λc+ → p π− e+ νe
Abstract
Based on 4.5 fb−1 of e+e- collision data collected with the BESIII detector at the BEPCII collider at center-of-mass energies between 4.600 GeV and 4.699 GeV, the first search for the Cabbibo-suppressed semileptonic decay Λc+→ pπ-e+νe is performed. The branching fraction of Λc+→ pπ-e+νe is measured to be (2.96±0.95stat±0.23syst)×10−4 with a signal significance of 4.2σ.
Related
- Looking at radiative corrections to the Σ±→Λe± ν̅ semileptonic decay-rate ratio
- Quasi-four-body semileptonic decay B̅0→ a0(1450)+ (→π+ η)ℓ-ν̅ℓ within a0(1450)-resonance leading-twist LCDA under QCDSR
- Evidence for the decay B0 → μ+ μ- and improved measurements of the decay B0s → μ+ μ-
- Evidence for the decay B0s→ϕη'
- Evidence for the decay Bs0→ ϕ η′
BibTeX
@misc{collaboration2026evidence,
title = {{Evidence for the semileptonic decay $Λ_c^+ \to p π^- e^+ ν_e$}},
author = {BESIII Collaboration and M. Ablikim and M. N. Achasov and P. Adlarson and X. C. Ai and C. S. Akondi and R. Aliberti and A. Amoroso and Q. An and Y. H. An and Y. Bai and O. Bakina and Y. Ban and H. -R. Bao and X. L. Bao and V. Batozskaya and K. Begzsuren and N. Berger and M. Berlowski and M. B. Bertani and D. Bettoni and F. Bianchi and E. Bianco and A. Bortone and I. Boyko and R. A. Briere and A. Brueggemann and H. Cai and M. H. Cai and X. Cai and A. Calcaterra and G. F. Cao and N. Cao and S. A. Cetin and X. Y. Chai and J. F. Chang and T. T. Chang and G. R. Che and Y. Z. Che and C. H. Chen and Chao Chen and G. Chen and H. S. Chen and H. Y. Chen and M. L. Chen and S. J. Chen and S. M. Chen and T. Chen and W. Chen and X. R. Chen and X. T. Chen and X. Y. Chen and Y. B. Chen and Y. Q. Chen and Z. K. Chen and J. Cheng and L. N. Cheng and S. K. Choi and X. Chu and G. Cibinetto},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.17135},
eprint = {2609.17135},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.17135},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Evidence for the semileptonic decay Λ_c^+ → p π^− e^+ ν_e
AU - BESIII Collaboration
AU - M. Ablikim
AU - M. N. Achasov
AU - P. Adlarson
AU - X. C. Ai
AU - C. S. Akondi
AU - R. Aliberti
AU - A. Amoroso
AU - Q. An
AU - Y. H. An
AU - Y. Bai
AU - O. Bakina
AU - Y. Ban
AU - H. -R. Bao
AU - X. L. Bao
AU - V. Batozskaya
AU - K. Begzsuren
AU - N. Berger
AU - M. Berlowski
AU - M. B. Bertani
AU - D. Bettoni
AU - F. Bianchi
AU - E. Bianco
AU - A. Bortone
AU - I. Boyko
AU - R. A. Briere
AU - A. Brueggemann
AU - H. Cai
AU - M. H. Cai
AU - X. Cai
AU - A. Calcaterra
AU - G. F. Cao
AU - N. Cao
AU - S. A. Cetin
AU - X. Y. Chai
AU - J. F. Chang
AU - T. T. Chang
AU - G. R. Che
AU - Y. Z. Che
AU - C. H. Chen
AU - Chao Chen
AU - G. Chen
AU - H. S. Chen
AU - H. Y. Chen
AU - M. L. Chen
AU - S. J. Chen
AU - S. M. Chen
AU - T. Chen
AU - W. Chen
AU - X. R. Chen
AU - X. T. Chen
AU - X. Y. Chen
AU - Y. B. Chen
AU - Y. Q. Chen
AU - Z. K. Chen
AU - J. Cheng
AU - L. N. Cheng
AU - S. K. Choi
AU - X. Chu
AU - G. Cibinetto
PY - 2026
DA - 2026/09/15
PB - arXiv
DO - 10.48550/arxiv.2609.17135
UR - https://arxiv.org/abs/2609.17135
AB - Based on 4.5 fb^−1 of e^+e^- collision data collected with the BESIII detector at the BEPCII collider at center-of-mass energies between 4.600 GeV and 4.699 GeV, the first search for the Cabbibo-suppressed semileptonic decay Λ_c^+→ pπ^-e^+ν_e is performed. The branching fraction of Λ_c^+→ pπ^-e^+ν_e is measured to be (2.96±0.95_stat±0.23_syst)×10^−4 with a signal significance of 4.2σ.
ER -