A search for double-heavy tetraquark state candidates Xccs¯s¯ decaying to Ds+Ds+ and Ds∗+Ds∗+ is presented for the first time using the data samples of 102×106 ϒ(1S) and 158×106 ϒ(2S) events, and the data samples at s=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 Ds+Ds+ and Ds∗+Ds∗+ are studied to search for possible resonances. No significant signals are observed, and the 90% confidence level upper limits on the product branching fractions [B(ϒ(1S,2S)→Xccs¯s¯+anything)×B(Xccs¯s¯→Ds+Ds+(Ds∗+Ds∗+))] in ϒ(1S,2S) inclusive decays and the product values of Born cross section and branching fraction [σ(e+e-→Xccs¯s¯+anything)×B(Xccs¯s¯→Ds+Ds+(Ds∗+Ds∗+))] in e+e- collisions at s=10.52, 10.58, and 10.867 GeV under different assumptions of Xccs¯s¯ masses and widths are obtained.

Search for tetraquark states Xcc s- s- in Ds+ Ds+ (Ds∗+ Ds∗+) final states at Belle / Gao, X.Y., Li, Y., Shen, C.P., Adachi, I., Aihara, H., Asner, D.M., Atmacan, H., Aushev, T., Ayad, R., Behera, P., Belous, K., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Bobrov, A., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 105:3(2022). [10.1103/PhysRevD.105.032002]

Search for tetraquark states Xcc s- s- in Ds+ Ds+ (Ds∗+ Ds∗+) final states at Belle

Campajola M.;Di Capua F.;Merola M.;Pardi S.;Russo Guido;
2022

Abstract

A search for double-heavy tetraquark state candidates Xccs¯s¯ decaying to Ds+Ds+ and Ds∗+Ds∗+ is presented for the first time using the data samples of 102×106 ϒ(1S) and 158×106 ϒ(2S) events, and the data samples at s=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 Ds+Ds+ and Ds∗+Ds∗+ are studied to search for possible resonances. No significant signals are observed, and the 90% confidence level upper limits on the product branching fractions [B(ϒ(1S,2S)→Xccs¯s¯+anything)×B(Xccs¯s¯→Ds+Ds+(Ds∗+Ds∗+))] in ϒ(1S,2S) inclusive decays and the product values of Born cross section and branching fraction [σ(e+e-→Xccs¯s¯+anything)×B(Xccs¯s¯→Ds+Ds+(Ds∗+Ds∗+))] in e+e- collisions at s=10.52, 10.58, and 10.867 GeV under different assumptions of Xccs¯s¯ masses and widths are obtained.
2022
Search for tetraquark states Xcc s- s- in Ds+ Ds+ (Ds∗+ Ds∗+) final states at Belle / Gao, X.Y., Li, Y., Shen, C.P., Adachi, I., Aihara, H., Asner, D.M., Atmacan, H., Aushev, T., Ayad, R., Behera, P., Belous, K., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Bobrov, A., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 105:3(2022). [10.1103/PhysRevD.105.032002]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/968975
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