Exotic doubly charmed Ds0*(2317)D and Ds1*(2460)D* molecules

Sanchez Sanchez, M. (Institut de Physique Nucléaire, CNRS-IN2P3, University Paris-Sud, Université Paris-Saclay, F-91406 Orsay Cedex, France) ; Geng, Li-Sheng (School of Physics and Nuclear Energy Engineering, International Research Center for Nuclei and Particles in the Cosmos and Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing 100191, China) ; Lu, Jun-Xu (School of Physics and Nuclear Energy Engineering, International Research Center for Nuclei and Particles in the Cosmos and Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing 100191, China) ; Hyodo, Tetsuo (Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan) ; Valderrama, M. Pavon (School of Physics and Nuclear Energy Engineering, International Research Center for Nuclei and Particles in the Cosmos and Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing 100191, China)

05 September 2018

Abstract: The Ds0*(2317)D and Ds1*(2460)D* heavy meson systems can exchange a kaon that is emitted in the S-wave due to the opposite intrinsic parity of the Ds0*(Ds1*) and D(D*) mesons. As a consequence of the mass difference of the Ds0*(Ds1*) and D(D*) mesons, the range of the kaon exchange potential will be significantly longer than expected, corresponding to an effective mass of about 200 MeV. The potential will be very strong: the strength of the interaction is proportional to (mDs0mD)2/fπ2 and (mDs1mD*)2/fπ2. This combination of range and strength almost guarantees the existence of Ds0*(2317)D and Ds1*(2460)D* bound states with JP=0 and JP=0, 2, respectively. Concrete calculations indicate a binding energy of 5–15 MeV independently of JP. The Ds0*(2317)D and Ds1*(2460)D* molecules have manifestly exotic flavor quantum numbers: C=2, S=1, and I=1/2. We expect the existence of bottom counterparts composed of the BBs0 and B*Bs1* mesons, which will be more bound and have a richer spectrum that might include a shallow P-wave state and an excited S-wave state.


Published in: Physical Review D 98 (2018)
Published by: APS
DOI: 10.1103/PhysRevD.98.054001
arXiv: 1707.03802
License: CC-BY-4.0



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