This title appears in the Scientific Report : 2015 

Refined analysis on the $X ( 3872 )$ resonance
Meng, Ce (Corresponding author)
Sanz-Cillero, Juan José / Shi, Meng / Yao, De-Liang / Zheng, Han-Qing
Institut 3 (Theoretische Kernphysik); IKP-3
Theorie der Starken Wechselwirkung; IAS-4
Physical Review D Physical review / D, 92 92 (2015 2015) 3 3, S. 034020 034020
[S.l.] Soc. 2015
Journal Article
Computational Science and Mathematical Methods
Please use the identifier: in citations.
Please use the identifier: in citations.
We study the property of the X(3872) meson by analyzing the B→KDD¯∗ and B→KJ/ψπ+π− decay processes. The competition between the rescattering mediated through a Breit-Wigner resonance and the rescattering generated from a local DD¯∗→DD¯∗ interaction is carefully studied through an effective Lagrangian approach. Three different fits are performed: pure Breit-Wigner case, pure DD¯∗ molecule case with only local rescattering vertices (generated by the loop chain), and the mixed case. It is found that data supports the picture where X(3872) is mainly a (c¯c) Breit-Wigner resonance with a small contribution to the self-energy generated by D¯D∗ final state interaction. For our optimal fit, the pole mass and width are found to be: MX=3871.2±0.7  MeV and ΓX=6.5±1.2  MeV.