期刊
PHYSICAL REVIEW D
卷 92, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.92.034020
关键词
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资金
- National Nature Science Foundations of China [10925522, 11021092]
- ERDF funds from the European Commission [FPA2010-17747, FPA2013-44773-P, SEV-2012-0249, CSD2007-00042]
- Comunidad de Madrid [HEPHACOS] [S2009/ESP-1473]
We study the property of the X(3872) meson by analyzing the B -> KD (D) over bar* and B -> KJ/psi pi(+)pi(-) decay processes. The competition between the rescattering mediated through a Breit-Wigner resonance and the rescattering generated from a local D (D) over bar* -> D (D) over bar* interaction is carefully studied through an effective Lagrangian approach. Three different fits are performed: pure Breit-Wigner case, pure D (D) over bar* 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) over barc) Breit-Wigner resonance with a small contribution to the self-energy generated by (D) over barD* final state interaction. For our optimal fit, the pole mass and width are found to be: M-X = 3871.2 +/- 0.7 MeV and Gamma(X) = 6.5 +/- 1.2 MeV.
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