Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2007-01-25
Physics
High Energy Physics
High Energy Physics - Lattice
4 pages, 5 figures, typos corrected, fig.3 replaced, references added, conclusion does not change
Scientific paper
The excited states of charmonia are numerically investigated in quenched lattice QCD with improved gauge and Wilson fermion actions formulated on anisotropic lattices. Through a constrained curve fitting algorithm, the masses of the first excited states in $0^{++}$, $1^{++}$, and $1^{+-}$ channels are determined to be 3.825(88), 3.853(57), and 3.858(70) GeV, respectively. Furthormore, a node structure is also observed in the Bethe-Salpeter amplitude of the $1^{++}$ first excited state. These observations indicate that X(3872) could be the first radial excitation of $\chi_{c1}$.
Chen Yafeng
Liu Chuan
Liu Yubin
Ma Jianping
Zhang Jianbo
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