TY - JOUR
T1 - Observation of a Resonant Structure near the Ds+ Ds- Threshold in the B+ → Ds+ Ds- K+ Decay
AU - (LHCb Collaboration)
AU - Aaij, R.
AU - Abdelmotteleb, A. S.W.
AU - Abellan Beteta, C.
AU - Abudinén, F.
AU - Ackernley, T.
AU - Adeva, B.
AU - Adinolfi, M.
AU - Afsharnia, H.
AU - Agapopoulou, C.
AU - Aidala, C. A.
AU - Aiola, S.
AU - Ajaltouni, Z.
AU - Akar, S.
AU - Akiba, K.
AU - Albrecht, J.
AU - Alessio, F.
AU - Alexander, M.
AU - Alfonso Albero, A.
AU - Aliouche, Z.
AU - Alvarez Cartelle, P.
AU - Amalric, R.
AU - Amato, S.
AU - Amey, J. L.
AU - Amhis, Y.
AU - An, L.
AU - Anderlini, L.
AU - Andersson, M.
AU - Andreianov, A.
AU - Andreotti, M.
AU - Andreou, D.
AU - Ao, D.
AU - Archilli, F.
AU - Artamonov, A.
AU - Artuso, M.
AU - Aslanides, E.
AU - Atzeni, M.
AU - Audurier, B.
AU - Bachmann, S.
AU - Bachmayer, M.
AU - Back, J. J.
AU - Bailly-Reyre, A.
AU - Baladron Rodriguez, P.
AU - Balagura, V.
AU - Baldini, W.
AU - Baptista De Souza Leite, J.
AU - Barbetti, M.
AU - Barlow, R. J.
AU - Barsuk, S.
AU - Barter, W.
AU - Milanes, D. A.
N1 - Publisher Copyright:
© 2023 CERN.
PY - 2023/8/18
Y1 - 2023/8/18
N2 - An amplitude analysis of the B+→Ds+Ds-K+ decay is carried out to study for the first time its intermediate resonant contributions, using proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. A near-threshold peaking structure, referred to as X(3960), is observed in the Ds+Ds- invariant-mass spectrum with significance greater than 12 standard deviations. The mass, width, and the quantum numbers of the structure are measured to be 3956±5±10 MeV, 43±13±8 MeV, and JPC=0++, respectively, where the first uncertainties are statistical and the second systematic. The properties of the new structure are consistent with recent theoretical predictions for a state composed of cc¯ss¯ quarks. Evidence for an additional structure is found around 4140 MeV in the Ds+Ds- invariant mass, which might be caused either by a new resonance with the 0++ assignment or by a J/ψφ↔Ds+Ds- coupled-channel effect.
AB - An amplitude analysis of the B+→Ds+Ds-K+ decay is carried out to study for the first time its intermediate resonant contributions, using proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. A near-threshold peaking structure, referred to as X(3960), is observed in the Ds+Ds- invariant-mass spectrum with significance greater than 12 standard deviations. The mass, width, and the quantum numbers of the structure are measured to be 3956±5±10 MeV, 43±13±8 MeV, and JPC=0++, respectively, where the first uncertainties are statistical and the second systematic. The properties of the new structure are consistent with recent theoretical predictions for a state composed of cc¯ss¯ quarks. Evidence for an additional structure is found around 4140 MeV in the Ds+Ds- invariant mass, which might be caused either by a new resonance with the 0++ assignment or by a J/ψφ↔Ds+Ds- coupled-channel effect.
UR - http://www.scopus.com/inward/record.url?scp=85168818186&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.131.071901
DO - 10.1103/PhysRevLett.131.071901
M3 - Article
AN - SCOPUS:85168818186
SN - 0031-9007
VL - 131
JO - Physical Review Letters
JF - Physical Review Letters
IS - 7
M1 - 071901
ER -