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Search: authors:"Xian-Wei Kang"

3 papers found.
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Branching fractions of semileptonic D and \(D_s\) decays from the covariant light-front quark model

Based on the predictions of the relevant form factors from the covariant light-front quark model, we show the branching fractions for the \(D (D_s) \rightarrow (P,\,S,\,V,\,A)\,\ell \nu _\ell \) (\(\ell =e\) or \(\mu \)) decays, where P denotes the pseudoscalar meson, S the scalar meson with a mass above 1 GeV, V the vector meson and A the axial-vector one. Comparison with the ...

Different pole structures in line shapes of the X(3872)

We introduce a near-threshold parameterization that is more general than the effective-range expansion up to and including the effective range because it can also handle a near-threshold zero in the \(D^0\bar{D}^{*0}\) S-wave. In terms of it we analyze the CDF data on inclusive \(p\bar{p}\) scattering to \(J/\psi \pi ^+\pi ^-\), and the Belle and BaBar data on B decays to \(K\, ...

Antinucleon-nucleon interaction in chiral effective field theory

Results of an exploratory study of the antinucleon-nucleon interaction within chiral effective field theory are reported. The antinucleon-nucleon potential is derived up to next-to-next-to-leading order, based on a modified Weinberg power counting, in close analogy to pertinent studies of the nucleon-nucleon interaction. The low-energy constants associated with the arising contact ...