Observation of the $T_{c\bar{c}1}(4430)^-$ state in $B^0\to D^{*-}D^0K^+$ decays

A study of resonant structures in $B^0 \to D^{*-}D^0K^+$ decays is presented. The analysis uses proton-proton collision data collected by the LHCb experiment at center-of-mass energies of $\sqrt{s} = 7$, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb$^{-1}$. The analysis demonstrates that the existing known excited $D_s^+$ resonances in the $D^0K^+$ spectrum are insufficient to describe the data. The inclusion of the tetraquark state $T_{c\bar{c}1}(4430)^-$ improves the description of the data with a statistical significance exceeding $5σ$. This corresponds to the first observation of the $T_{c\bar{c}1}(4430)^- \to D^{*-} D^0$ decay. The measured properties of the $T_{c\bar{c}1}(4430)^-$ state are consistent with those previously measured in its decay to the $ψ(2S)π^-$ final state.

Authors

Publication Details

Journal
arXiv (Cornell University)
Published
2026-10-26
DOI
https://doi.org/10.48550/arxiv.2610.35239
Primary Topic
Quantum Chromodynamics and Particle Interactions
Type
preprint
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preprint

Observation of the $T_{c\bar{c}1}(4430)^-$ state in $B^0\to D^{*-}D^0K^+$ decays

S. Bachmann, A Balboni, F. Alessio, R. Aaij et al.
arXiv (Cornell University)
Quantum Chromodynamics and Particle Interactions
preprint

Observation of the $T_{c\bar{c}1}(4430)^-$ state in $B^0\to D^{*-}D^0K^+$ decays

S. Bachmann, A Balboni, F. Alessio, R. Aaij, F. Abudinén, RJ Barlow, LHCb collaboration, T. Ackernley, Z. Baldwin, O. Bezshyyko, L. Balzani, Z. Areg, C. Barbero Pretel, A. Bavarchee, N. A. Behling, S. Andres Estrada, R. Aleksiejunas, A. Biolchini, A. Bellavista, I. R. Barbosa, I. B. Bediaga, J. L. M. Berkey, J. Baptista de Souza Leite, S. Baron, M. Becker, M. Argenton, M. Barbetti, M. Barnyakov, M. Bachmayer, M. Adinolfi, M. S. Bieker, S. Bashir, S. Belin, S. Bhattacharya, E Ben-Haim, T Blake, K Akiba, I Belyaev, L Anderlini, A Bertolin, B Adeva, A Bizzeti, A Bay, F Archilli, W Barter, P Adlarson, J Albrecht, P Albicocco, F Bedeschi, L An, G Bencivenni, C. Abellan Beteta, B. Batsukh, H. Al Saleh, R. Bernet, Y. Amhis, M. Abdelfatah, W. Barker, M. Bai, L. Bertsch, L. Arnone, P. Alvarez Cartelle, Alves, A. A., Jr, A. S. W. Abdelmotteleb, C Agapopoulou, H Bao, F Betti, D. Bacher, J. L. Amey, Z. Amos, J. Bex, A. Anelli, J. Bartz, P. Andreola, S. Arguedas Cuendis, N. V. Biesuz, A. A. Adefisoye, C. A. Aidala, M. Birch, P. B. Battista, C. Arata, M. Artuso, M. Atzeni, V. Balagura, S. Amato, W. Baldini, A. Bitadze, E. Aslanides, J. J. Back, F. C. R. Bishop, I. Bachiller Perea, M. Andreotti, B. Audurier, S. Akar, A. Beck, J. A. Authier, D. Ao, Z. B. Bai, R. Ataíde Da Silva, S. Barsuk
preprint en

Abstract

A study of resonant structures in $B^0 \to D^{*-}D^0K^+$ decays is presented. The analysis uses proton-proton collision data collected by the LHCb experiment at center-of-mass energies of $\sqrt{s} = 7$, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb$^{-1}$. The analysis demonstrates that the existing known excited $D_s^+$ resonances in the $D^0K^+$ spectrum are insufficient to describe the data. The inclusion of the tetraquark state $T_{c\bar{c}1}(4430)^-$ improves the description of the data with a statistical significance exceeding $5σ$. This corresponds to the first observation of the $T_{c\bar{c}1}(4430)^- \to D^{*-} D^0$ decay. The measured properties of the $T_{c\bar{c}1}(4430)^-$ state are consistent with those previously measured in its decay to the $ψ(2S)π^-$ final state.

arXiv (Cornell University)
Quantum Chromodynamics and Particle Interactions
DOIOpen Access PDFOpenAlex
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