This title appears in the Scientific Report :
2011
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevD.84.074029 in citations.
Please use the identifier: http://hdl.handle.net/2128/10267 in citations.
Three-body Ddquer pion dynamics for the X(3872)
Three-body Ddquer pion dynamics for the X(3872)
We investigate the role played by the three-body DD pi dynamics on the near-threshold resonance X(3872) charmonium state, which is assumed to be formed by nonperturbative DD* dynamics. It is demonstrated that, as compared to the naive static-pions approximation, the imaginary parts that originate fr...
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Personal Name(s): | Baru, V. |
---|---|
Filin, A. A. / Hanhart, C. / Kalashnikova, Y. S. / Kudryavtsev, A. E. / Nefediev, A. V. | |
Contributing Institute: |
Theorie der starken Wechselwirkung; IKP-3 |
Published in: | Physical Review D Physical review / D, 84 84 (2011 2011) 7 7, S. 074029 074029 |
Imprint: |
[S.l.]
Soc.
2011
2011-10-20 2011-10-01 |
Physical Description: |
074029 |
DOI: |
10.1103/PhysRevD.84.074029 |
Document Type: |
Journal Article |
Research Program: |
Physik der Hadronen und Kerne |
Series Title: |
Physical Review D
84 |
Subject (ZB): | |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/10267 in citations.
We investigate the role played by the three-body DD pi dynamics on the near-threshold resonance X(3872) charmonium state, which is assumed to be formed by nonperturbative DD* dynamics. It is demonstrated that, as compared to the naive static-pions approximation, the imaginary parts that originate from the inclusion of dynamical pions reduce substantially the width from the DD pi intermediate state. In particular, for a resonance peaked at 0.5 MeV below the (DD)-D-0*(0) threshold, this contribution to the width is reduced by about a factor of 2, and the effect of the pion dynamics on the width grows as long as the resonance is shifted towards the (DD0)-D-0 pi(0) threshold. Although the physical width of the X is dominated by inelastic channels, our finding should still be of importance for the X line shapes in the DD pi channel below DD* threshold. For example, in the scattering length approximation, the imaginary part of the scattering length includes effects of all the pion dynamics and does not only stem from the D* width. Meanwhile, we find that another important quantity for the X phenomenology, the residue at the X pole, is weakly sensitive to dynamical pions. In particular, we find that the binding energy dependence of this quantity from the full calculation is close to that found from a model with pointlike DD* interactions only, consistent with earlier claims. Coupled-channel effects (inclusion of the charged DD* channel) turn out to have a moderate impact on the results. |