Author:
Chen Ting,Chen Ying,Gong Ming,Liu Chuan,Liu Liuming,Liu Yu-Bin,Liu Zhaofeng,Ma Jian-Ping,Werner Markus,Zhang Jian-Bo
Abstract
Abstract
In this exploratory study, near-threshold scattering of D and
meson is investigated using lattice QCD with
twisted mass fermion configurations. The calculation is performed in the coupled-channel Lüscher finite-size formalism. The study focuses on the channel with
where the resonance-like structure
was discovered. We first identify the two most relevant channels and the lattice study is performed in the two-channel scattering model. Combined with the two-channel Ross-Shaw theory, scattering parameters are extracted from the energy levels by solving the generalized eigenvalue problem. Our results for the scattering length parameters suggest that for the particular lattice parameters that we studied, the best fit parameters do not correspond to the peak in the elastic scattering cross-section near the threshold. Furthermore, in the zero-range Ross-Shaw theory, the scenario of a narrow resonance close to the threshold is disfavored beyond the 3
level.
Subject
Astronomy and Astrophysics,Instrumentation,Nuclear and High Energy Physics
Cited by
12 articles.
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