Improved measurements of two-photon widths of the χcJ states and helicity analysis for χc2 →γγ

Based on 448.1×106  ψ(3686) events collected with the BESIII detector, the decays ψ(3686)→γχcJ,χcJ→γγ(J=0,1,2) are studied. The decay branching fractions of χc0,2→γγ are measured to be B(χc0→γγ)=(1.93±0.08±0.05±0.05)×10−4 and B(χc2→γγ)=(3.10±0.09±0.07±0.11)×10−4, which correspond to two-photon decay...

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Bibliographic Details

Published in:	Physical Review D Vol. 96, № 9. P. 092007-1-092007-11
Other Authors:	Achasov, M. N., Ahmed, S., Chelkov, G. A., Ablikim, M.
Format:	Article
Language:	English
Subjects:	BESIII, детектор BEPCII, коллайдер статьи в журналах
Online Access:	http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000644981 Перейти в каталог НБ ТГУ