Hadronic transitions of χcJ→ηcπ +π- (J=0, 1, 2) are searched for using a sample of 1.06×10^8 ψ(3686) events collected with the BESIII detector at the BEPCII storage ring. The ηc is reconstructed with K0_SK±π-+ and K+K-π0 final states. No signals are observed in any of the three χcJ states in either ηc decay mode. At the 90% confidence level, the upper limits are determined to be B(χc0→ηc π+π-)<0.07%, B(χc1→ηc π+π-)<0.32%, and B(χc2→ηc π+π-)<0.54%. The upper limit of B(χc1→ηc π+π-) is lower than the existing theoretical prediction by almost an order of magnitude. The branching fractions of χcJ→K0_SK±π-+ π+π-, K+K-π+π-π0, ωK+K-, and phi π+π-π0 (J=0, 1, 2) are measured for the first time.
Search for hadronic transition chi_cJ -> eta_c pi+pi- and observation of chi_cJ -> KKpipipi
DESTEFANIS, MARCO GIOVANNI;GRECO, Michela;MAGGIORA, MARCO;SPATARO, STEFANO GIOVANNI;
2013-01-01
Abstract
Hadronic transitions of χcJ→ηcπ +π- (J=0, 1, 2) are searched for using a sample of 1.06×10^8 ψ(3686) events collected with the BESIII detector at the BEPCII storage ring. The ηc is reconstructed with K0_SK±π-+ and K+K-π0 final states. No signals are observed in any of the three χcJ states in either ηc decay mode. At the 90% confidence level, the upper limits are determined to be B(χc0→ηc π+π-)<0.07%, B(χc1→ηc π+π-)<0.32%, and B(χc2→ηc π+π-)<0.54%. The upper limit of B(χc1→ηc π+π-) is lower than the existing theoretical prediction by almost an order of magnitude. The branching fractions of χcJ→K0_SK±π-+ π+π-, K+K-π+π-π0, ωK+K-, and phi π+π-π0 (J=0, 1, 2) are measured for the first time.File | Dimensione | Formato | |
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PhysRevD.87.012002.pdf
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PRD87.012002.arxiv.pdf
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