Based on a sample of (448.1 +/- 2.9) x 10^6 psi(3686) events collected with the BESIII detector at BEPCII, the decays of psi(3686) -> K-LambdaXibar+ + c.c. with Xibar -> Lambdabar pi+, Lambdabar -> pbar pi+ are studied. We investigate the two excited resonances, Xi(1690)- and Xi(1820)-, which are each observed with large significance (>> 10 sigma) in the K- Lambda invariant mass distributions. A partial wave analysis is performed, and the spin-parities of Xi(1690)- and Xi(1820)- are measured to be 1/2^- and 3/2^-, respectively. The masses, widths, and product branching fractions of Xi(1690)- and Xi(1820)- are also measured.

Study of excited Ξ states in ψ(3686) → K- Λ Ξbar+ + c. c.

Amoroso, A.;Bianchi, F.;Destefanis, M.;De Mori, F.;Greco, M.;Maggiora, M.;Marcello, S.;Sosio, S.;Spataro, S.;
2024-01-01

Abstract

Based on a sample of (448.1 +/- 2.9) x 10^6 psi(3686) events collected with the BESIII detector at BEPCII, the decays of psi(3686) -> K-LambdaXibar+ + c.c. with Xibar -> Lambdabar pi+, Lambdabar -> pbar pi+ are studied. We investigate the two excited resonances, Xi(1690)- and Xi(1820)-, which are each observed with large significance (>> 10 sigma) in the K- Lambda invariant mass distributions. A partial wave analysis is performed, and the spin-parities of Xi(1690)- and Xi(1820)- are measured to be 1/2^- and 3/2^-, respectively. The masses, widths, and product branching fractions of Xi(1690)- and Xi(1820)- are also measured.
2024
109
7
072008-1
072008-12
charmonium, Ξ hyperon, psi(3686)
Ablikim, M.; Achasov, M. N.; Adlarson, P.; Aliberti, R.; Amoroso, A.; An, M. R.; An, Q.; Bai, Y.; Bakina, O.; Balossino, I.; Ban, Y.; Batozskaya, V.; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/2027997
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