Observation of Bc+ →Dh+h- Decays

(LHCb Collaboration)

doi:10.1103/fsj9-89jt

Observation of Bc+ →Dh+h- Decays

(LHCb Collaboration)

Science Park 105
University of Warwick
Physik-Institut der Universität Zürich
University of Liverpool
Syracuse University
Universidade de Santiago de Compostela
University of Bristol
Department of Physics and Astronomy
Uppsala University
Université Paris-Saclay
University of Michigan, Ann Arbor
Clermont-Auvergne University
LNF-INFN
Fakultät Physik
University of Dortmund
University of Rome “Tor Vergata”
Vilnius University
European Organization for Nuclear Research
University of Cambridge
Sorbonne Université
Instituto de Biofisica da UFRJ
State Key Laboratory of Nuclear Physics and Technology
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
Sezione INFN di Ferrara
Universidade da Coruña
INFN Sezione di Milano-Bicocca
University of Modena and Reggio Emilia
University of Chinese Academy of Sciences
INFN Roma Tor Vergata
Department of Physics and Astronomy
University of Victoria
Consejo Nacional de Rectores (CONARE)
Aix-Marseille Université
Institute of Physics
ENAC-IIC-GEL
Massachusetts Institute of Technology
Ip Paris
University of Oxford

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2 Citations (Scopus)

Résumé

Searches are presented for Bc+→Dh+h- decays, where D is a charmed meson and h± is a charged pion or kaon, using pp collision data collected by the LHCb experiment corresponding to an integrated luminosity of 9 fb-1. The decays Bc+→D+K+π-, Bc+→D∗+K+π-, and Bc+→Ds+K+K- are observed for the first time. Their branching fractions, expressed as ratios relative to that of the Bc+→Bs0π+ decay, are determined to be R(Bc+→D+K+π-)=(1.96±0.23±0.08±0.10)×10-3, R(Bc+→D∗+K+π-)=(3.67±0.55±0.24±0.20)×10-3, R(Bc+→Ds+K+K-)=(1.61±0.35±0.13±0.07)×10-3, where the first uncertainty is statistical, the second is systematic, and the third is due to the limited precision on the D-meson branching fractions. The decay channels proceed primarily through excited K0 or D0 resonances or φ mesons, and open a new avenue for studies of charge-parity violation in beauty mesons.

langue originale	Anglais
Numéro d'article	021804
journal	Physical Review Letters
Volume	136
Numéro de publication	2
Les DOIs	https://doi.org/10.1103/fsj9-89jt
état	Publié - 16 janv. 2026

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10.1103/fsj9-89jt

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@article{e1d70e6b66ed4e839551d473f0d3e5d2,

title = "Observation of Bc+ →Dh+h- Decays",

abstract = "Searches are presented for Bc+→Dh+h- decays, where D is a charmed meson and h± is a charged pion or kaon, using pp collision data collected by the LHCb experiment corresponding to an integrated luminosity of 9 fb-1. The decays Bc+→D+K+π-, Bc+→D∗+K+π-, and Bc+→Ds+K+K- are observed for the first time. Their branching fractions, expressed as ratios relative to that of the Bc+→Bs0π+ decay, are determined to be R(Bc+→D+K+π-)=(1.96±0.23±0.08±0.10){\texttimes}10-3, R(Bc+→D∗+K+π-)=(3.67±0.55±0.24±0.20){\texttimes}10-3, R(Bc+→Ds+K+K-)=(1.61±0.35±0.13±0.07){\texttimes}10-3, where the first uncertainty is statistical, the second is systematic, and the third is due to the limited precision on the D-meson branching fractions. The decay channels proceed primarily through excited K0 or D0 resonances or φ mesons, and open a new avenue for studies of charge-parity violation in beauty mesons.",

author = "\{(LHCb Collaboration)\} and R. Aaij and Abdelmotteleb, \{A. S.W.\} and \{Abellan Beteta\}, C. and F. Abudin{\'e}n 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 A. Artamonov and M. Artuso and E. Aslanides and \{Ata{\'i}de Da Silva\}, R. and M. Atzeni and B. Audurier and Authier, \{J. A.\} and D. Bacher and \{Bachiller Perea\}, I. and V. Balagura and F. Fleuret and E. Maurice and Niel, \{E. M.\}",

note = "Publisher Copyright: {\textcopyright} 2026 CERN.",

year = "2026",

month = jan,

day = "16",

doi = "10.1103/fsj9-89jt",

language = "English",

volume = "136",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "2",

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TY - JOUR

T1 - Observation of Bc+ →Dh+h- Decays

AU - (LHCb Collaboration)

AU - Aaij, R.

AU - Abdelmotteleb, A. S.W.

AU - Abellan Beteta, C.

AU - Abudinén, 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 - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Ataíde Da Silva, R.

AU - Atzeni, M.

AU - Audurier, B.

AU - Authier, J. A.

AU - Bacher, D.

AU - Bachiller Perea, I.

AU - Balagura, V.

AU - Fleuret, F.

AU - Maurice, E.

AU - Niel, E. M.

PY - 2026/1/16

Y1 - 2026/1/16

N2 - Searches are presented for Bc+→Dh+h- decays, where D is a charmed meson and h± is a charged pion or kaon, using pp collision data collected by the LHCb experiment corresponding to an integrated luminosity of 9 fb-1. The decays Bc+→D+K+π-, Bc+→D∗+K+π-, and Bc+→Ds+K+K- are observed for the first time. Their branching fractions, expressed as ratios relative to that of the Bc+→Bs0π+ decay, are determined to be R(Bc+→D+K+π-)=(1.96±0.23±0.08±0.10)×10-3, R(Bc+→D∗+K+π-)=(3.67±0.55±0.24±0.20)×10-3, R(Bc+→Ds+K+K-)=(1.61±0.35±0.13±0.07)×10-3, where the first uncertainty is statistical, the second is systematic, and the third is due to the limited precision on the D-meson branching fractions. The decay channels proceed primarily through excited K0 or D0 resonances or φ mesons, and open a new avenue for studies of charge-parity violation in beauty mesons.

AB - Searches are presented for Bc+→Dh+h- decays, where D is a charmed meson and h± is a charged pion or kaon, using pp collision data collected by the LHCb experiment corresponding to an integrated luminosity of 9 fb-1. The decays Bc+→D+K+π-, Bc+→D∗+K+π-, and Bc+→Ds+K+K- are observed for the first time. Their branching fractions, expressed as ratios relative to that of the Bc+→Bs0π+ decay, are determined to be R(Bc+→D+K+π-)=(1.96±0.23±0.08±0.10)×10-3, R(Bc+→D∗+K+π-)=(3.67±0.55±0.24±0.20)×10-3, R(Bc+→Ds+K+K-)=(1.61±0.35±0.13±0.07)×10-3, where the first uncertainty is statistical, the second is systematic, and the third is due to the limited precision on the D-meson branching fractions. The decay channels proceed primarily through excited K0 or D0 resonances or φ mesons, and open a new avenue for studies of charge-parity violation in beauty mesons.

UR - https://www.scopus.com/pages/publications/105027631812

U2 - 10.1103/fsj9-89jt

DO - 10.1103/fsj9-89jt

M3 - Article

AN - SCOPUS:105027631812

SN - 0031-9007

VL - 136

JO - Physical Review Letters

JF - Physical Review Letters

IS - 2

M1 - 021804

ER -

Observation of Bc+ →Dh+h- Decays

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