2020/01/31 by M. Ablikim, M. N. Achasov, P. Adlarson +472 · 1 citation
Physics and Astronomy · #hep-ex
paper · pdf · doi:10.1103/physrevlett.124.242001
published as Phys. Rev. Lett. 124, 242001 (2020)
arxiv created 2020/06/20 · arxiv updated 2020/07/01
The processes X(3872)→ D*0D0+c.c.,~γJ/ψ,~γψ(2S), and γD+D- are searched for in a 9.0~\rm fb-1 data sample collected at center-of-mass energies between 4.178 and 4.278 GeV with the BESIII detector. We observe X(3872)→ D*0D0+c.c. and find evidence for X(3872)→γJ/ψ with statistical significances of 7.4σ and 3.5σ, respectively. No evident signals for X(3872)→γψ(2S) and γD+D- are found, and upper limit on the relative branching ratio Rγψ ≡(B(X(3872)→γψ(2S)))/(B(X(3872)→γJ/ψ))<0.59 is set at 90% confidence level. Measurements of branching ratios relative to decay X(3872)→π+π- J/ψ are also reported for decays X(3872)→ D*0D0+c.c., ~γψ(2S),~γJ/ψ, γD+D-, as well as the non-D*0D0 three-body decays π0 D0D0 and γD0D0.