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Observation of the open-charm tetraquark candidate T*cs0 (2870)0 in the B-→D-D0K0S decay

An amplitude analysis of 𝐵−→𝐷−⁢𝐷0⁢𝐾0𝑆 decays is performed using proton-proton collision data, corresponding to an integrated luminosity of 9 fb−1, collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. A resonant structure of spin-parity 0+ is observed in the 𝐷0⁢𝐾0𝑆 invaria...

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Main Authors: Aaij, Roel (Author) , Bachmann, Sebastian (Author) , Carus, Leon (Author) , Caspary, Rowina (Author) , Celani, Sara (Author) , Cocha Toapaxi, Carlos (Author) , De Cian, Michel (Author) , Dittmann, Lucas (Author) , Esen, Sevda (Author) , Glaser, Fabian (Author) , Günther, Paul André (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Herrero Gascón, Paula (Author) , Langenbruch, Christoph (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Morgenthaler, Maurice Pierre (Author) , Roy, Shreya (Author) , Ruiz Diaz, Miguel (Author) , Tuci, Giulia (Author) , Uecker, Lennart Henning (Author) , Unverzagt, Daniel Joachim (Author) , Uwer, Ulrich (Author) , Wang, Chishuai (Author) , Witola, Lukas (Author) , Zhao, Ya (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 11 March, 2025
In: Physical review letters
Year: 2025, Volume: 134, Issue: 10, Pages: 1-13
ISSN:1079-7114
DOI:10.1103/PhysRevLett.134.101901
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.134.101901
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.134.101901
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Author Notes:R. Aaij et al. (LHCb Collaboration*)
Description
Summary:An amplitude analysis of 𝐵−→𝐷−⁢𝐷0⁢𝐾0𝑆 decays is performed using proton-proton collision data, corresponding to an integrated luminosity of 9 fb−1, collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. A resonant structure of spin-parity 0+ is observed in the 𝐷0⁢𝐾0𝑆 invariant-mass spectrum with a significance of 5.3⁢𝜎. The mass and width of the state, modeled with a Breit-Wigner line shape, are determined to be 2883±11±8 MeV/𝑐2 and 87+22−47 ±17 MeV, respectively, where the first uncertainties are statistical and the second systematic. These properties and the quark content are consistent with those of the open-charm tetraquark candidate 𝑇*𝑐⁢𝑠⁢0⁢(2870)0 observed previously in the 𝐷+⁢𝐾− final state of the 𝐵−→𝐷−⁢𝐷+⁢𝐾− decay. This result confirms the existence of the 𝑇*𝑐⁢𝑠⁢0⁢(2870)0 state in a new decay mode. The 𝑇*𝑐⁢𝑠⁢1⁢(2900)0 state, reported in the 𝐵−→𝐷−⁢𝐷+⁢𝐾− decay, is also searched for in the 𝐷0⁢𝐾0𝑆 invariant-mass spectrum of the 𝐵− →𝐷−⁢𝐷0⁢𝐾0𝑆 decay, without finding evidence for it.
Item Description:Veröffentlicht: 11. März 2025
Im Titel ist das Asterixzeichen, Zahl 0 sowie das Minuszeichen hochgestellt
Im Titel ist der Ausdruck "cs=" sowie der Buchstabe S tiefgestellt
*LHCb Collaboration: R. Aaij, S. Bachmann, L. Carus, R. Caspary, S. Celani, C. Cocha Toapaxi, M. De Cian, L. Dittmann, S. Esen, F.C. Glaser, P.A. Günther, X. Han, S. Hansmann-Menzemer, P. Herrero Gascon, C. Langenbruch, B. Leverington, J. Marks, M.P. Morgenthaler, S.R. Roy, M. Ruiz Diaz, G. Tuci, L.H. Uecker, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, Y. Zhao, A. Zhelezov [und 1124 weitere Personen]
Gesehen am 22.01.2026
Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.134.101901

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