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 lineshape, are determined to be 2883 ± 11 ± 8 MeV/c^2 and 87{−47}{+22} ± 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 state Tcs0*(2870)0 observed previously in the D+ K− final state of the B− → D− D+ K− decay. This result confirms the existence of the Tcs0*(2870)0 state in a new decay mode. The Tcs1*(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.

Aaij, R., Abdelmotteleb, A. . ., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adefisoye, A. ., et al. (2025). Observation of the Open-Charm Tetraquark Candidate Tcs0*(2870)0 in the B− → D− D0 K0S Decay. PHYSICAL REVIEW LETTERS, 134(10), 1-13 [10.1103/physrevlett.134.101901].

Observation of the Open-Charm Tetraquark Candidate Tcs0*(2870)0 in the B− → D− D0 K0S Decay

Carbone, A.;Ferrari, F.;Galli, D.;Patrignani, C.;Spedicato, E.;Villa, A.;Zenesini, F.;
2025

Abstract

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 lineshape, are determined to be 2883 ± 11 ± 8 MeV/c^2 and 87{−47}{+22} ± 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 state Tcs0*(2870)0 observed previously in the D+ K− final state of the B− → D− D+ K− decay. This result confirms the existence of the Tcs0*(2870)0 state in a new decay mode. The Tcs1*(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.
2025
Aaij, R., Abdelmotteleb, A. . ., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adefisoye, A. ., et al. (2025). Observation of the Open-Charm Tetraquark Candidate Tcs0*(2870)0 in the B− → D− D0 K0S Decay. PHYSICAL REVIEW LETTERS, 134(10), 1-13 [10.1103/physrevlett.134.101901].
Aaij, R.; Abdelmotteleb, A.  S.  W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adefisoye, A.  A.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Agapop...espandi
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1007494
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact