Using 448.1×106 ψ(3686) events collected with the BESIII detector at BEPCII, we employ a single-baryon tagging technique to make the first observation of ψ(3686)→Ξ(1530)-Ξ̄(1530)+ and Ξ(1530)-Ξ̄+ decays with a statistical significance of more than 10σ and 5.0σ, respectively. The branching fractions are measured to be B(ψ(3686)→Ξ(1530)-Ξ̄(1530)+)=(11.45±0.40±0.59)×10-5 and B(ψ(3686)→Ξ(1530)-Ξ̄+)=(0.70±0.11±0.04)×10-5. The angular distribution parameter for ψ(3686)→Ξ(1530)-Ξ̄(1530)+ is determined to be α=0.40±0.24±0.06, which agrees with the theoretical predictions within 1σ. The first uncertainties are statistical, and the second systematic.

Observation of ψ (3686)→ Ξ (1530)- Ξ ̄ (1530)+ and Ξ (1530)- Ξ ̄ + OBSERVATION of ... ABLIKIM M. et al

Pacetti S.;
2019

Abstract

Using 448.1×106 ψ(3686) events collected with the BESIII detector at BEPCII, we employ a single-baryon tagging technique to make the first observation of ψ(3686)→Ξ(1530)-Ξ̄(1530)+ and Ξ(1530)-Ξ̄+ decays with a statistical significance of more than 10σ and 5.0σ, respectively. The branching fractions are measured to be B(ψ(3686)→Ξ(1530)-Ξ̄(1530)+)=(11.45±0.40±0.59)×10-5 and B(ψ(3686)→Ξ(1530)-Ξ̄+)=(0.70±0.11±0.04)×10-5. The angular distribution parameter for ψ(3686)→Ξ(1530)-Ξ̄(1530)+ is determined to be α=0.40±0.24±0.06, which agrees with the theoretical predictions within 1σ. The first uncertainties are statistical, and the second systematic.
2019
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11391/1460359
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 28
  • ???jsp.display-item.citation.isi??? 28
social impact