Using a sample of 1.06×108 ψ′ decays collected by the BESIII detector, χc0 and χc2 decays into π0π0 and ηη are studied. The branching fraction results are Br(χc0→π0π0)=(3.23±0.03±0.23±0.14)×10-3, Br(χc2→π0π0)=(8.8±0.2±0.6±0.4)×10-4, Br(χc0→ηη)=(3.44±0.10±0.24±0.2)×10-3, and Br(χc2→ηη)=(6.5±0.4±0.5±0.3)×10-4, where the uncertainties are statistical, systematic due to this measurement, and systematic due to the branching fractions of ψ′→γχcJ. The results provide information on the decay mechanism of χc states into pseudoscalars.

Branching fraction measurements of χc0 and χc2 to π0π0 and ηη

DESTEFANIS, MARCO GIOVANNI;GRECO, Michela;MAGGIORA, MARCO;SPATARO, STEFANO GIOVANNI;
2010-01-01

Abstract

Using a sample of 1.06×108 ψ′ decays collected by the BESIII detector, χc0 and χc2 decays into π0π0 and ηη are studied. The branching fraction results are Br(χc0→π0π0)=(3.23±0.03±0.23±0.14)×10-3, Br(χc2→π0π0)=(8.8±0.2±0.6±0.4)×10-4, Br(χc0→ηη)=(3.44±0.10±0.24±0.2)×10-3, and Br(χc2→ηη)=(6.5±0.4±0.5±0.3)×10-4, where the uncertainties are statistical, systematic due to this measurement, and systematic due to the branching fractions of ψ′→γχcJ. The results provide information on the decay mechanism of χc states into pseudoscalars.
2010
81
052005-1
052005-8
M. Ablikim; M. N. Achasov; L. An; Q. An; Z. H. An; J. Z. Bai; Y. Ban; N. Berger; J. M. Bian; I. Boyko; R. A. Briere; V. Bytev; X. Cai; G. F. Cao; X. X...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/75175
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