ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2012, vol. 86, p. -
Measurement of χ cj decaying into pn̄π - and pn̄π -π0
Using a data sample of 1.06×108 ψ ′ events collected with the BESIII detector in 2009, the branching fractions of χ cJ→pn̄π - and χ cJ→pn̄π -π0 (J=0, 1, 2) are measured. (Throughout the text, inclusion of charge conjugate modes is implied if not stated otherwise.) The results for χ c0→pn̄π - and χ c2→pn̄π - are consistent with, but much more precise than, those of previous measurements. The decays of χ c1→pn̄π - and χ cJ→ pn̄π -π0 are observed for the first time. © 2012 American Physical Society.