Study of the 𝐵0→Λ+𝑐⁢¯Λ−𝑐⁢𝐾0𝑆 decay

R. Aaij; M. Abdelfatah; A. S. W. Abdelmotteleb; C. Abellan Beteta; F. Abudinen; T. Ackernley; A. A. Adefisoye; B. Adeva; M. Adinolfi; P. Adlarson; C. Agapopoulou; C. A. Aidala; Z. Ajaltouni; S. Akar; K. Akiba; P. Albicocco; J. Albrecht; R. Aleksiejunas; F. Alessio; P. Alvarez Cartelle; R. Amalric; S. Amato; J. L. Amey; Y. Amhis; L. An; L. Anderlini; M. Andersson; P. Andreola; M. Andreotti; S. Andres Estrada; A. Anelli; D. Ao; C. Arata; F. Archilli; Z. Areg; M. Argenton; S. Arguedas Cuendis; L. Arnone; M. Artuso; E. Aslanides; R. Ataide Da Silva; M. Atzeni; LHCb collaboration; X. Chiotopoulos; J. A. de Vries; M. Merk; D. Nicotra; C. J. Pawley; G. Scriven; M. van Veghel; K. Vos

doi:10.1103/jrkb-q3w6

Study of the 𝐵0→Λ+𝑐⁢¯Λ−𝑐⁢𝐾0𝑆 decay

R. Aaij^*
, M. Abdelfatah
, A. S. W. Abdelmotteleb
, C. Abellan Beteta
, F. Abudinen
, T. Ackernley
, A. A. Adefisoye
, B. Adeva
, M. Adinolfi
, P. Adlarson
, C. Agapopoulou
, C. A. Aidala
, Z. Ajaltouni
, S. Akar
, K. Akiba
, P. Albicocco
, J. Albrecht
, R. Aleksiejunas
, F. Alessio
, P. Alvarez Cartelle

R. Amalric, S. Amato, J. L. Amey, Y. Amhis, L. An, L. Anderlini, M. Andersson, P. Andreola, M. Andreotti, S. Andres Estrada, A. Anelli, D. Ao, C. Arata, F. Archilli, Z. Areg, M. Argenton, S. Arguedas Cuendis, L. Arnone, M. Artuso, E. Aslanides, R. Ataide Da Silva, M. Atzeni, LHCb collaboration, X. Chiotopoulos, J. A. de Vries, M. Merk, D. Nicotra, C. J. Pawley, G. Scriven, M. van Veghel, K. Vos

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

The decay B-0 -> Lambda(+)(c) (Lambda) over bar (-)(c) K-S(0) is studied at LHCb for the first time using proton-proton collision data recorded by the LHCb experiment at a center-of-mass energy of root s = 13 TeV, corresponding to an integrated luminosity of 5.4 fb(-1). The branching ratio relative to the decay B+ -> Lambda(+)(c) (Lambda) over bar (-)(c) K+ is measured to be [B(B-0 -> Lambda(+)(c) (Lambda) over bar (-)(c) K-S(0))/[B(B+ -> Lambda(+)(c) (Lambda) over bar (-)(c) K+)] = 0.53 +/- 0.05 +/- 0.05 where the first uncertainty is statistical and the second is systematic. Evidence is found for contributions from two resonant states, Xi(c) (2923)(+) and Xi(c) (2939)(+), in the Lambda(+)(c) K-S(0) system. The two states show a significance of 3.9 sigma relative to the nonresonant hypothesis. These two Xi(+)(c) states are consistent with being the isospin partners of the states observed in the Lambda(+)(c) K- system.

Original language	English
Article number	012012
Number of pages	14
Journal	Physical Review D
Volume	114
Issue number	1
DOIs	https://doi.org/10.1103/jrkb-q3w6
Publication status	Published - 13 Jul 2026

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Aaij, R., Abdelfatah, M., Abdelmotteleb, A. S. W., Beteta, C. A., Abudinen, F., Ackernley, T., Adefisoye, A. A., Adeva, B., Adinolfi, M., Adlarson, P., Agapopoulou, C., Aidala, C. A., Ajaltouni, Z., Akar, S., Akiba, K., Albicocco, P., Albrecht, J., Aleksiejunas, R., Alessio, F., ... Vos, K. (2026). Study of the 𝐵0→Λ+𝑐⁢¯Λ−𝑐⁢𝐾0𝑆 decay. Physical Review D, 114(1), Article 012012. https://doi.org/10.1103/jrkb-q3w6

@article{84cbd30d6b8e4888aa904c572ecb4d63,

title = "Study of the 𝐵0→Λ+𝑐⁢¯Λ−𝑐⁢𝐾0𝑆 decay",

abstract = "The decay B-0 -> Lambda(+)(c) (Lambda) over bar (-)(c) K-S(0) is studied at LHCb for the first time using proton-proton collision data recorded by the LHCb experiment at a center-of-mass energy of root s = 13 TeV, corresponding to an integrated luminosity of 5.4 fb(-1). The branching ratio relative to the decay B+ -> Lambda(+)(c) (Lambda) over bar (-)(c) K+ is measured to be [B(B-0 -> Lambda(+)(c) (Lambda) over bar (-)(c) K-S(0))/[B(B+ -> Lambda(+)(c) (Lambda) over bar (-)(c) K+)] = 0.53 +/- 0.05 +/- 0.05 where the first uncertainty is statistical and the second is systematic. Evidence is found for contributions from two resonant states, Xi(c) (2923)(+) and Xi(c) (2939)(+), in the Lambda(+)(c) K-S(0) system. The two states show a significance of 3.9 sigma relative to the nonresonant hypothesis. These two Xi(+)(c) states are consistent with being the isospin partners of the states observed in the Lambda(+)(c) K- system.",

author = "R. Aaij and M. Abdelfatah and Abdelmotteleb, \{A. S. W.\} and Beteta, \{C. Abellan\} and F. Abudinen and T. Ackernley and Adefisoye, \{A. A.\} and B. Adeva and M. Adinolfi and P. Adlarson and C. Agapopoulou and Aidala, \{C. A.\} and Z. Ajaltouni and S. Akar and K. Akiba and P. Albicocco and J. Albrecht and R. Aleksiejunas and F. Alessio and \{Alvarez Cartelle\}, P. and R. Amalric and S. Amato and Amey, \{J. L.\} and Y. Amhis and L. An and L. Anderlini and M. Andersson and P. Andreola and M. Andreotti and \{Andres Estrada\}, S. and A. Anelli and D. Ao and C. Arata and F. Archilli and Z. Areg and M. Argenton and \{Arguedas Cuendis\}, S. and L. Arnone and M. Artuso and E. Aslanides and \{Da Silva\}, \{R. Ataide\} and M. Atzeni and \{LHCb collaboration\} and X. Chiotopoulos and \{de Vries\}, \{J. A.\} and M. Merk and D. Nicotra and Pawley, \{C. J.\} and G. Scriven and \{van Veghel\}, M. and K. Vos",

year = "2026",

month = jul,

day = "13",

doi = "10.1103/jrkb-q3w6",

language = "English",

volume = "114",

journal = "Physical Review D",

issn = "1550-7998",

publisher = "American Physical Society",

number = "1",

}

Aaij, R, Abdelfatah, M, Abdelmotteleb, ASW, Beteta, CA, Abudinen, F, Ackernley, T, Adefisoye, AA, Adeva, B, Adinolfi, M, Adlarson, P, Agapopoulou, C, Aidala, CA, Ajaltouni, Z, Akar, S, Akiba, K, Albicocco, P, Albrecht, J, Aleksiejunas, R, Alessio, F, Alvarez Cartelle, P, Amalric, R, Amato, S, Amey, JL, Amhis, Y, An, L, Anderlini, L, Andersson, M, Andreola, P, Andreotti, M, Andres Estrada, S, Anelli, A, Ao, D, Arata, C, Archilli, F, Areg, Z, Argenton, M, Arguedas Cuendis, S, Arnone, L, Artuso, M, Aslanides, E, Da Silva, RA, Atzeni, M, LHCb collaboration, Chiotopoulos, X , de Vries, JA , Merk, M , Nicotra, D , Pawley, CJ , Scriven, G , van Veghel, M & Vos, K 2026, 'Study of the 𝐵0→Λ+𝑐⁢¯Λ−𝑐⁢𝐾0𝑆 decay', Physical Review D, vol. 114, no. 1, 012012. https://doi.org/10.1103/jrkb-q3w6

TY - JOUR

T1 - Study of the 𝐵0→Λ+𝑐⁢¯Λ−𝑐⁢𝐾0𝑆 decay

AU - Aaij, R.

AU - Abdelfatah, M.

AU - Abdelmotteleb, A. S. W.

AU - Beteta, C. Abellan

AU - Abudinen, F.

AU - Ackernley, T.

AU - Adefisoye, A. A.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Adlarson, P.

AU - Agapopoulou, C.

AU - Aidala, C. A.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Akiba, K.

AU - Albicocco, P.

AU - Albrecht, J.

AU - Aleksiejunas, R.

AU - Alessio, F.

AU - Alvarez Cartelle, P.

AU - Amalric, R.

AU - Amato, S.

AU - Amey, J. L.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andersson, M.

AU - Andreola, P.

AU - Andreotti, M.

AU - Andres Estrada, S.

AU - Anelli, A.

AU - Ao, D.

AU - Arata, C.

AU - Archilli, F.

AU - Areg, Z.

AU - Argenton, M.

AU - Arguedas Cuendis, S.

AU - Arnone, L.

AU - Artuso, M.

AU - Aslanides, E.

AU - Da Silva, R. Ataide

AU - Atzeni, M.

AU - LHCb collaboration

AU - Chiotopoulos, X.

AU - de Vries, J. A.

AU - Merk, M.

AU - Nicotra, D.

AU - Pawley, C. J.

AU - Scriven, G.

AU - van Veghel, M.

AU - Vos, K.

PY - 2026/7/13

Y1 - 2026/7/13

N2 - The decay B-0 -> Lambda(+)(c) (Lambda) over bar (-)(c) K-S(0) is studied at LHCb for the first time using proton-proton collision data recorded by the LHCb experiment at a center-of-mass energy of root s = 13 TeV, corresponding to an integrated luminosity of 5.4 fb(-1). The branching ratio relative to the decay B+ -> Lambda(+)(c) (Lambda) over bar (-)(c) K+ is measured to be [B(B-0 -> Lambda(+)(c) (Lambda) over bar (-)(c) K-S(0))/[B(B+ -> Lambda(+)(c) (Lambda) over bar (-)(c) K+)] = 0.53 +/- 0.05 +/- 0.05 where the first uncertainty is statistical and the second is systematic. Evidence is found for contributions from two resonant states, Xi(c) (2923)(+) and Xi(c) (2939)(+), in the Lambda(+)(c) K-S(0) system. The two states show a significance of 3.9 sigma relative to the nonresonant hypothesis. These two Xi(+)(c) states are consistent with being the isospin partners of the states observed in the Lambda(+)(c) K- system.

AB - The decay B-0 -> Lambda(+)(c) (Lambda) over bar (-)(c) K-S(0) is studied at LHCb for the first time using proton-proton collision data recorded by the LHCb experiment at a center-of-mass energy of root s = 13 TeV, corresponding to an integrated luminosity of 5.4 fb(-1). The branching ratio relative to the decay B+ -> Lambda(+)(c) (Lambda) over bar (-)(c) K+ is measured to be [B(B-0 -> Lambda(+)(c) (Lambda) over bar (-)(c) K-S(0))/[B(B+ -> Lambda(+)(c) (Lambda) over bar (-)(c) K+)] = 0.53 +/- 0.05 +/- 0.05 where the first uncertainty is statistical and the second is systematic. Evidence is found for contributions from two resonant states, Xi(c) (2923)(+) and Xi(c) (2939)(+), in the Lambda(+)(c) K-S(0) system. The two states show a significance of 3.9 sigma relative to the nonresonant hypothesis. These two Xi(+)(c) states are consistent with being the isospin partners of the states observed in the Lambda(+)(c) K- system.

U2 - 10.1103/jrkb-q3w6

DO - 10.1103/jrkb-q3w6

M3 - Article

SN - 1550-7998

VL - 114

JO - Physical Review D

JF - Physical Review D

IS - 1

M1 - 012012

ER -

Study of the 𝐵0→Λ+𝑐⁢¯Λ−𝑐⁢𝐾0𝑆 decay

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