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A Comprehensive Four-Quark Interpretation of D_s(2317), D_s(2457) and D_s(2632)

Yu-Qi Chen·Xue-Qian Li
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Abstract

The recently observed new member of the charm-strange family D_s(2632) which has a surprisingly narrow width is challenging our theory. D_s(2317) and D_s(2457) which were observed earlier have similar behaviors and receive various theoretical explanations. Some authors use the heavy hadron chiral effective theory to evaluate heavy-light quark systems and obtain a reasonable evaluation on the masses of D_s(2317) and D_s(2457). An alternative picture is to interpret them as four-quark or molecular states. In this work, we are following the later and propose a unitive description for all the three new members D_s(2632), D_s(2317) and D_s(2457) and at least, so far our picture is consistent with the data.

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Yu-Qi Chen, Xue-Qian Li. 2004-07-06. A Comprehensive Four-Quark Interpretation of D_s(2317), D_s(2457) and D_s(2632). https://doi.org/10.1103/physrevlett.93.232001

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