Observation of the Open-Charm Tetraquark Candidate <math display="inline"><mrow><msubsup><mrow><mi>T</mi></mrow><mrow><mi>c</mi><mi>s</mi><mn>0</mn></mrow><mrow><mo>*</mo></mrow></msubsup><mo stretchy="false">(</mo><mn>2870</mn><msup><mrow><mo stretchy="false">)</mo></mrow><mrow><mn>0</mn></mrow></msup></mrow></math> in the <math display="inline"><mrow><msup><mrow><mi>B</mi></mrow><mrow><mo>-</mo></mrow></msup><mo stretchy="false">→</mo><msup><mrow><mi>D</mi></mrow><mrow><mo>-</mo></mrow></msup><msup><mrow><mi>D</mi></mrow><mrow><mn>0</mn></mrow></msup><msubsup><mrow><mi>K</mi></mrow><mrow><mi>S</mi></mrow><mrow><mn>0</mn></mrow></msubsup></mrow></math> Decay

Aaij, Roel; Abdelmotteleb, Ahmed Sameh Wagih; Abellan Beteta, Carlos; Abudinén, Fernando Jesus; Ackernley, Thomas; Adefisoye, A.A.; Adefisoye, Ayomide Matthew; Adeva, Bernardo; Adinolfi, Marco; Adlarson, Patrik Harri

doi:10.1103/PhysRevLett.134.101901

Observation of the Open-Charm Tetraquark Candidate $T_{c s 0}^{*} (2870)^{0}$ in the $B^{-} \to D^{-} D^{0} K_{S}^{0}$ Decay

LHCb

Collaboration

Nov 29, 2024

21 pages

Published in:

Phys.Rev.Lett. 134 (2025) 10, 101901

Published: Mar 11, 2025

e-Print:

2411.19781 [hep-ex]

DOI:

10.1103/PhysRevLett.134.101901 (publication)

Report number:

LHCb-PAPER-2024-040,
CERN-EP-2024-287

Experiments:

CERN-LHC-LHCb

View in:

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reference search2 citations

Citations per year

Abstract: (APS)

An amplitude analysis of

B^{-} \to D^{-} D^{0} K_{S}^{0}

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

D^{0} K_{S}^{0}

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 \pm 11 \pm 8 MeV / c^{2}

and

87_{- 47}^{+ 22} \pm 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^{-} \to 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^{-} \to D^{-} D^{+} K^{-}

decay, is also searched for in the

D^{0} K_{S}^{0}

invariant-mass spectrum of the

B^{-} \to D^{-} D^{0} K_{S}^{0}

decay, without finding evidence for it.

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Observation of the Open-Charm Tetraquark Candidate Tcs0*(2870)0 in the B-→D-D0KS0 Decay

Citations per year

Observation of the Open-Charm Tetraquark Candidate $T_{c s 0}^{*} (2870)^{0}$ in the $B^{-} \to D^{-} D^{0} K_{S}^{0}$ Decay