Observation and investigation of the Tc(c)over-bar1(4430)+ structure in B+ → ψ(2S)KS0π+ decays



Aaij, R, Abdelmotteleb, ASW, Beteta, C Abellan, Abudinen, F, Ackernley, T, Adefisoye, AA, Adeva, B, Adinolfi, M, Adlarson, P, Agapopoulou, C
et al (show 1168 more authors) (2026) Observation and investigation of the Tc(c)over-bar1(4430)+ structure in B+ → ψ(2S)KS0π+ decays PHYSICAL REVIEW D, 113 (7). l071101-. ISSN 2470-0010, 2470-0029

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Abstract

The first four-dimensional amplitude analysis of the B+ → ψ(2S)K0<inf>S</inf>π+ decay is performed with proton-proton collision data collected by the LHCb experiment at √s = 13 TeV, corresponding to an integrated luminosity of 5.4 fb−1. The data cannot be fully explained by B+ → ψ(2S)K*+ contributions alone. A significantly better description of the data is obtained by adding a T+<inf>cc</inf> contribution decaying to ψ(2S)π+. The properties of the T+<inf>cc</inf> structure are consistent with the exotic state T<inf>cc1</inf>(4430)+ reported in the isospin-related B0 → ψ(2S)K−π+ decay. Effects of a possible T<inf>cc1</inf>(4430)+ → D*<inf>1</inf> (2600)0D+ decay mode on the T<inf>cc1</inf>(4430)+ → ψ(2S)π+ mass distribution are investigated through a Flatté parametrization, providing constraints on the relative decay strength. A description of the T<inf>cc1</inf>(4430)+ structure using the triangle singularity mechanism is studied and also found to be consistent with the data.

Item Type: Article
Uncontrolled Keywords: 4902 Mathematical Physics, 49 Mathematical Sciences
Divisions: Faculty of Humanities & Social Sciences
Faculty of Science & Engineering
Faculty of Science & Engineering > School of Physical Sciences
Faculty of Science & Engineering > School of Physical Sciences > Physics
Faculty of Humanities & Social Sciences > School of the Arts
Faculty of Humanities & Social Sciences > School of the Arts > Architecture
Depositing User: Symplectic Admin
Date Deposited: 27 Apr 2026 08:45
Last Modified: 23 May 2026 20:04
DOI: 10.1103/rcfs-ynh2
Open Access URL: https://journals.aps.org/prd/pdf/10.1103/rcfs-ynh2
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3198165
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