Strong decays of the newly observed $D(2550)$, $D(2600)$, $D(2750)$, and $D(2760)$

Details Strong decays of the newly observed $D(2550)$, $D(2600)$, $D(2750)$, and $D(2760)$ Strong decays of the newly observed $D(2550)$, $D(2600)$, $D(2750)$, and $D(2760)$

2010-09-02

arxiv.org/abs/1009.0359v2

Phys.Rev.D82:114014,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 5 figures; The review of the model is added. Some discussion of the $D(2750)$ is included

Scientific paper

10.1103/PhysRevD.82.114014

The strong decay properties of the newly observed $D(2550)$, $D(2600)$, $D(2750)$ and $D(2760)$ are studied in a constituent quark model. It is predicted that the $D(2760)$ and $D(2750)$ seem to be two overlapping resonances. The $D(2760)$ could be identified as the $1^3D_3$ with $J^P=3^-$, while the $D(2750)$ is most likely to be the high-mass mixed state $|1{D_2}'>_H$ ($J^P=2^-$) via the $1^1D_2$-$1^3D_2$ mixing. The $D(2600)$ favors the low-mass mixed state $|(SD)_1>_L$ $(J^P=1^-)$ via the $1^3D_1$-$2^3S_1$ mixing. The $D(2550)$ as the $2^1S_0$ assignment bears controversies for its too broad width given in experiments.

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