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Observation of a Resonant Structure near the D_{s}^{+}D_{s}^{-} Threshold in the B^{+}→D_{s}^{+}D_{s}^{-}K^{+} Decay

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  • معلومة اضافية
    • Contributors:
      Aaij, R; Abdelmotteleb, A S W; Abellan Beteta, C; Abudinén, F; Ackernley, T; Adeva, B; Adinolfi, M; Afsharnia, H; Agapopoulou, C; Aidala, C A; Aiola, S; Ajaltouni, Z; Akar, S; Akiba, K; Albrecht, J; Alessio, F; Alexander, M; Alfonso Albero, A; Aliouche, Z; Alvarez Cartelle, P; Amalric, R; Amato, S; Amey, J L; Amhis, Y; An, L; Anderlini, L; Andersson, M; Andreianov, A; Andreotti, M; Andreou, D; Ao, D; Archilli, F; Artamonov, A; Artuso, M; Aslanides, E; Atzeni, M; Audurier, B; Bachmann, S; Bachmayer, M; Back, J J; Bailly-Reyre, A; Baladron Rodriguez, P; Balagura, V; Baldini, W; Baptista de Souza Leite, J; Barbetti, M; Barlow, R J; Barsuk, S; Barter, W; Bartolini, M; Baryshnikov, F; Basels, J M; Bassi, G; Batsukh, B; Battig, A; Bay, A; Beck, A; Becker, M; Bedeschi, F; Bediaga, I B; Beiter, A; Belavin, V; Belin, S; Bellee, V; Belous, K; Belov, I; Belyaev, I; Benane, G; Bencivenni, G; Ben-Haim, E; Berezhnoy, A; Bernet, R; Bernet Andres, S; Berninghoff, D; Bernstein, H C; Bertella, C; Bertolin, A; Betancourt, C; Betti, F; Bezshyiko, Ia; Bhasin, S; Bhom, J; Bian, L; Bieker, M S; Biesuz, N V; Bifani, S; Billoir, P; Biolchini, A; Birch, M; Bishop, F C R; Bitadze, A; Bizzeti, A; Blago, M P; Blake, T; Blanc, F; Blusk, S; Bobulska, D; Boelhauve, J A; Boente Garcia, O; Boettcher, T
    • الموضوع:
      2023
    • Collection:
      Università degli Studi di Cagliari: UNICA IRIS
    • نبذة مختصرة :
      An amplitude analysis of the B thorn & RARR; D thorn s D-s K thorn 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 D thorn s D-s 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 1 5 1 10 MeV, 43 1 13 1 8 MeV, and JPC = 0 thorn thorn , 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 over bar ss over bar quarks. Evidence for an additional structure is found around 4140 MeV in the D thorn s D-s invariant mass, which might be caused either by a new resonance with the 0 thorn thorn assignment or by a J=& psi;& phi; & LRARR; D thorn s D-s coupled-channel effect.
    • Relation:
      info:eu-repo/semantics/altIdentifier/pmid/37656865; info:eu-repo/semantics/altIdentifier/wos/WOS:001063214600004; volume:131; issue:7; numberofpages:12; journal:PHYSICAL REVIEW LETTERS; https://hdl.handle.net/11584/383906; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85168818186
    • الرقم المعرف:
      10.1103/PhysRevLett.131.071901
    • Rights:
      info:eu-repo/semantics/openAccess
    • الرقم المعرف:
      edsbas.8E28F79D