Observation of the Open-Charm Tetraquark Candidate (Formula presented) in the (Formula presented) Decay


Aaij, R ORCID: 0000-0003-0533-1952, Abdelmotteleb, ASW ORCID: 0000-0001-7905-0542, Abellan Beteta, C, Abudinén, F ORCID: 0000-0002-6737-3528, Ackernley, T ORCID: 0000-0002-5951-3498, Adefisoye, AA ORCID: 0000-0003-2448-1550, Adeva, B ORCID: 0000-0001-9756-3712, Adinolfi, M ORCID: 0000-0002-1326-1264, Adlarson, P ORCID: 0000-0001-6280-3851, Agapopoulou, C ORCID: 0000-0002-2368-0147 et al (show 90 more authors) (2025) Observation of the Open-Charm Tetraquark Candidate (Formula presented) in the (Formula presented) Decay Physical Review Letters, 134 (10). 101901-. ISSN 0031-9007, 1079-7114

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Abstract

An amplitude analysis of (Formula presented) decays is performed using proton-proton collision data, corresponding to an integrated luminosity of (Formula presented), collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. A resonant structure of spin-parity (Formula presented) is observed in the (Formula presented) invariant-mass spectrum with a significance of (Formula presented). The mass and width of the state, modeled with a Breit-Wigner line shape, are determined to be (Formula presented) and (Formula presented), 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 (Formula presented) observed previously in the (Formula presented) final state of the (Formula presented) decay. This result confirms the existence of the (Formula presented) state in a new decay mode. The (Formula presented) state, reported in the (Formula presented) decay, is also searched for in the (Formula presented) invariant-mass spectrum of the (Formula presented) decay, without finding evidence for it.

Item Type: Article
Uncontrolled Keywords: LHCb Collaboration
Divisions: Faculty of Humanities & Social Sciences
Faculty of Science & Engineering
Faculty of Science & Engineering > School of Engineering
Faculty of Science & Engineering > School of Physical Sciences
Faculty of Humanities & Social Sciences > School of the Arts
Depositing User: Symplectic Admin
Date Deposited: 10 Apr 2025 08:14
Last Modified: 22 Jan 2026 02:51
DOI: 10.1103/PhysRevLett.134.101901
Open Access URL: https://doi.org/10.1103/PhysRevLett.134.101901
Related Websites:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3191328
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