Observation of a Resonant Structure near the D_{s}^{+}D_{s}^{-} Threshold in the B^{+}→D_{s}^{+}D_{s}^{-}K^{+} Decay. - Aaij R; Abdelmotteleb ASW; Abellan Beteta C; Abudinén F; Ackernley T; Adeva B; Adinolfi M; Afsharnia H; Agapopoulou C; Aidala CA; Aiola S; Ajaltouni Z; et al. (Physical review letters, 2023)