4.7 Article

Dynamics of hadronic molecule in one-boson exchange approach and possible heavy flavor molecules

期刊

PHYSICAL REVIEW D
卷 79, 期 5, 页码 -

出版社

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.79.054005

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资金

  1. China Postdoctoral Science foundation [20070420735]
  2. National Natural Science Foundation of China [10775124]

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We extend the one pion exchange model at quark level to include the short distance contributions coming from eta, sigma, rho and omega exchange. This formalism is applied to discuss the possible molecular states of D (D) over bar* / (D) over barD*, B (B) over bar* / (B) over barB*, DD*, BB*, the pseudoscalar-vector systems with C = B = 1 and C = -B = 1 respectively. The delta function'' term contribution and the S-D mixing effects have been taken into account. We find the conclusions reached after including the heavier mesons exchange are qualitatively the same as those in the one pion exchange model. The previous suggestion that 1(++) B (B) over bar* / (B) over barB* molecule should exist, is confirmed in the one-boson exchange model, whereas DD* bound state should not exist. The D (D) over bar* / (D) over barD* system can accommodate a 1(++) molecule close to the threshold, the mixing between the molecule and the conventional charmonium has to be considered to identify this state with X(3872). For the BB* system, the pseudoscalar-vector systems with C = B = 1 and C = -B = 1, near threshold molecular states may exist. These bound states should be rather narrow, isospin is violated and the I = 0 component is dominant. Experimental search channels for these states are suggested.

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