20.500.12556/DKUM-92511 Search for tetraquark states X_{c c \bar{s} \bar{s}}$▫ in ▫$D_s^+ D_s^+$▫ (▫$D_s^{\ast +} D_s^{\ast +}$▫) final states at Belle A search for double-heavy tetraquark state candidates Xccs¯s¯ decaying to Dþ s Dþ s and Dþ s Dþ s is presented for the first time using the data samples of 102 × 106 ϒð1SÞ and 158 × 106 ϒð2SÞ events, and the data samples at ffiffi ps ¼ 10.52, 10.58, and 10.867 GeV corresponding to integrated luminosities of 89.5, 711.0, and 121.4 fb−1, respectively, accumulated with the Belle detector at the KEKB asymmetric energy electron-positron collider. The invariant-mass spectra of the Dþ s Dþ s and Dþ s Dþ s are studied to search for possible resonances. No significant signals are observed, and the 90% confidence level upper limits on the product branching fractions [Bðϒð1S; 2SÞ → Xccs¯s¯ þ anythingÞ × BðXccs¯s¯ → Dþ s Dþ s ðDþ s Dþ s ÞÞ] in ϒð1S; 2SÞ inclusive decays and the product values of Born cross section and branching fraction [σðeþe− → Xccs¯s¯ þ anythingÞ × BðXccs¯s¯ → Dþ s Dþ s ðDþ s Dþ s ÞÞ] in eþe− collisions at pffiffis ¼ 10.52, 10.58, and 10.867 GeV under different assumptions of Xccs¯s¯ masses and widths are obtained. tetraquark states final states at Belle stanja tetrakvarkov končna stanja po Bellu true false true American Physical Society Angleški jezik Slovenski jezik Znanstveno delo 2025-04-15 12:50:32 2025-04-15 14:33:54 2025-11-21 10:22:19 0000-00-00 00:00:00 2022 0 0 Str. 1-12 št. 3, št. članka 032002 Letn. 105 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2021-12-06 2022-01-21 2022-02-08 539.1 100996099 10.1103/PhysRevD.105.032002 2470-0010 Gao-2022-Search_for_tetraquark_states__i_X_sub.pdf Gao-2022-Search_for_tetraquark_states__i_X_sub.pdf 1 6E615672B26E96F085B9134B302CB2E9 09225c7ba369757f6e1326fcf4e5d45d1da45e976933f3ed40aeac54a5de571b c8a5d5db-19f5-11f0-abed-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=190313 https://doi.org/10.1103/PhysRevD.105.032002 0 d212c45c-19f5-11f0-abed-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=190314 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0