Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-04-02
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages, To appear in proceedings of the XIII International Conference on Hadron Spectroscopy, Nov. 29 - Dec. 4, 2009, Florida
Scientific paper
In order to classify the charmed-strange mesons, including puzzling D_{s0}^{*}(2317) and D_{s1}(2460), and recently observed D_{s1}^{*}(2710) and D_{sJ}^{*}(2860), we employ the U~(12)*O(3,1) level-classification scheme of hadrons proposed and developed by us in recent years. The scheme has a new degree of freedom, SU(2)_{\rho}, which leads to a number of extra states out of conventional SU(6)-scheme, named chiralons. Applying this novel classification scheme, we investigate the strong decays of S- and P-wave c\bar{s} mesons with one pseudoscalar emission by using the covariant oscillator quark model. As a result it is shown that D_{s0}^{*}(2317) and D_{s1}(2460) are described as {}^{1}S_{0}^{\chi} and {}^{3}S_{1}^{\chi} chiralons, forming the SU(2)_{\rho} doublet with the ground-state D_{s}^{} and D_{s}^{*}, respectively. Furthermore, the observed decay properties of D_{s1}^{*}(2710) is consistently explained as the vector chiralon {}^{1}P_{1}^{\chi}. On the other hand, it is also found that the controversial narrow state, D_{sJ}^{*}(2860), does not fit as predicted properties of our P-wave vector chiralon.
Ishida Shin
Maeda Tomohito
Oda Masuho
Yamada Kenji
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