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Observation and investigation of the Tcc[bar]⁒1⁒(4430)+ structure in B+ β†’πœ“β‘(2⁒S)⁒K0Sβ’πœ‹+ decays

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The first four-dimensional amplitude analysis of the 𝐡+ β†’πœ“β‘(2⁒𝑆)⁒𝐾0Sβ’πœ‹+ decay is performed with proton-proton collision data collected by the LHCb experiment at βˆšπ‘  =13 TeV, corresponding to an integrated luminosity of 5.4 f⁑bβˆ’1. The data cannot be fully explained by 𝐡+ β†’πœ“β‘(2⁒𝑆)⁒𝐾*+ contributions alo...

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Main Authors: Aaij, Roel (Author) , Bachmann, Sebastian (Author) , Carus, Leon (Author) , Caspary, Rowina (Author) , Cocha Toapaxi, Carlos (Author) , Dittmann, Lucas (Author) , Glaser, Fabian (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Herrero Gascón, Paula (Author) , Kolb, Ruben (Author) , Langenbruch, Christoph (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Morgenthaler, Maurice Pierre (Author) , Ruiz Diaz, Miguel (Author) , Schiller, Manuel (Author) , Tat, Martin Duy (Author) , Tuci, Giulia (Author) , Uecker, Lennart Henning (Author) , Uwer, Ulrich (Author) , Wang, Chishuai (Author) , Wolf, Tom (Author) , Zhao, Ya (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal) Editorial
Language:English
Published: 7 April 2026
In: Physical review
Year: 2026, Volume: 113, Issue: 7, Pages: 1-13
ISSN:2470-0029
DOI:10.1103/rcfs-ynh2
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1103/rcfs-ynh2
Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/rcfs-ynh2
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Author Notes:R. Aaij et al. (LHCb Collaboration*)
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Summary:The first four-dimensional amplitude analysis of the 𝐡+ β†’πœ“β‘(2⁒𝑆)⁒𝐾0Sβ’πœ‹+ decay is performed with proton-proton collision data collected by the LHCb experiment at βˆšπ‘  =13 TeV, corresponding to an integrated luminosity of 5.4 f⁑bβˆ’1. The data cannot be fully explained by 𝐡+ β†’πœ“β‘(2⁒𝑆)⁒𝐾*+ contributions alone. A significantly better description of the data is obtained by adding a 𝑇+𝑐⁒¯𝑐 contribution decaying to πœ“β‘(2⁒𝑆)β’πœ‹+. The properties of the 𝑇+𝑐⁒¯𝑐 structure are consistent with the exotic state 𝑇𝑐⁒¯𝑐⁒1⁒(4430)+ reported in the isospin-related ¯𝐡0 β†’πœ“β‘(2⁒𝑆)β’πΎβˆ’β’πœ‹+ decay. Effects of a possible 𝑇𝑐⁒¯𝑐⁒1⁒(4430)+ →¯𝐷*1⁒(2600)0⁒𝐷+ decay mode on the 𝑇𝑐⁒¯𝑐⁒1⁒(4430)+ β†’πœ“β‘(2⁒𝑆)β’πœ‹+ mass distribution are investigated through a Flatté parametrization, providing constraints on the relative decay strength. A description of the 𝑇𝑐⁒¯𝑐⁒1⁒(4430)+ structure using the triangle singularity mechanism is studied and also found to be consistent with the data.
Item Description:Veröffentlicht: 7. April 2026
Im Titel sind die Buchstaben c, der zweite Buchstabe S sowie die Zahl 1 tiefgestellt
Im Titel steht der zweite Buchstabe c mit einem Oberstrich
Im Titel sind die Pluszeichen sowie die Zahl 0 hochgestellt
*LHCb Collaboration: R. Aaij, S. Bachmann, L. Carus, R. Caspary, C. Cocha Toapaxi, L. Dittmann, F.C. Glaser, X. Han, S. Hansmann-Menzemer, P. Herrero Gascon, R. Kolb, C. Langenbruch, B. Leverington, J. Marks, M.P. Morgenthaler, M. Ruiz Diaz, M. Schiller, M.D. Tat, G. Tuci, L.H. Uecker, U. Uwer, C. Wang, T. Wolf, Y. Zhao, A. Zhelezov [und 1173 weitere Personen]
Gesehen am 19.08.2026
Physical Description:Online Resource
ISSN:2470-0029
DOI:10.1103/rcfs-ynh2

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