期刊
PHYSICAL REVIEW LETTERS
卷 107, 期 18, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.182001
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资金
- Ministry of Science and Technology of China
- National Natural Science Foundation of China
- Chinese Academy of Sciences
- Istituto Nazionale di Fisica Nucleare
- Russian Foundation for Basic Research
- Russian Academy of Science (Siberian branch)
- U.S. Department of Energy
- National Research Foundation of Korea
We present results of a study of the decay J/psi -> omega eta pi(+)pi(-) using a sample of (225.2 +/- 2.8) x 10(6) J/psi events collected by the BESIII detector, and report the observation of a new process J/psi -> omega X(1870) with a statistical significance of 7.2 sigma, in which X(1870) decays to a(0)(+/-)(980)pi(-/+). Fitting to eta pi(+)pi(-) mass spectrum yields a mass M = 1877.3 +/- 6.3(stat)(-7.4)(+3.4)(syst) MeV/c(2), a width Gamma = 57 +/- 12(stat)(-4)(+19)(syst) MeV/c(2), and a product branching fraction B(J/psi -> omega X) x B(X -> a(0)(+/-)(980)pi(-/+)) x B(a(0)(+/-)(980)(->) eta pi(+/-)) = [1.50 +/- 0.26(stat)(-0.36)(+0.72)(syst)] x 10(-4). Signals for J/psi -> omega f(1)(1285) and J/psi -> omega eta(1405) are also clearly observed and measured.
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