Using a data sample of 1.06×108 ψ′ events collected with the BESIII detector in 2009, the branching fractions of χcJ→pn̅ π- and χcJ→pn̅ π-π0 (J=0, 1, 2) are measured. (Throughout the text, inclusion of charge conjugate modes is implied if not stated otherwise.) The results for χc0→pn̅ π- and χc2→pn̅ π- are consistent with, but much more precise than, those of previous measurements. The decays of χc1→pn̅ π- and χcJ→pn̅ π-π0 are observed for the first time.
Measurement of χcj decaying into pn̅ π- and pn̅ π-π0
DESTEFANIS, MARCO GIOVANNI;GRECO, Michela;MAGGIORA, MARCO;SPATARO, STEFANO GIOVANNI;
2012-01-01
Abstract
Using a data sample of 1.06×108 ψ′ events collected with the BESIII detector in 2009, the branching fractions of χcJ→pn̅ π- and χcJ→pn̅ π-π0 (J=0, 1, 2) are measured. (Throughout the text, inclusion of charge conjugate modes is implied if not stated otherwise.) The results for χc0→pn̅ π- and χc2→pn̅ π- are consistent with, but much more precise than, those of previous measurements. The decays of χc1→pn̅ π- and χcJ→pn̅ π-π0 are observed for the first time.
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