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.
2013
87
012002-1
012002-13
M. Ablikim; M. N. Achasov; D. J. Ambrose; F. F. An; Q. An; Z. H. An; J. Z. Bai; Y. Ban; J. Becker; J.V. Bennett; M. Bertani; J. M. Bian; E. Boger; O. ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/127425
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