Four- And five-body scattering calculations of exotic hadron systems

Emiko Hiyama, Hideo Suganuma, Masayasu Kamimura

研究成果: ジャーナルへの寄稿学術誌査読

6 被引用数 (Scopus)

抄録

We study the five-quark system uudds̄ in the standard non-relativistic quark model by solving the scattering problem. Using the Gaussian Expansion Method (GEM), we perform the almost precise multi-quark calculations by treating a very large five-body modelspace including the NK scattering channel explicitly. Although a lot of pseudostates (discretized continuum states) with Jπ = 1/2± and Jπ = 3/2 ± are obtained within the bound-state approximation, all the states in 1.4 - 1.85 GeV in mass around Θ+(1540) melt into non-resonant continuum states through the coupling with the NK scattering state in the realistic case, i.e., there is no five-quark resonance below 1.85 GeV. Instead, we predict a five-quark resonance state of Jπ = 1/2 - with the mass of about 1.9 GeV and the width of Γ ≃ 2.68 MeV. Similar calculation is done for the four-quark system cc̄qq̄ (q = u, d) in connection with X0 (3872).

本文言語英語
ページ(範囲)101-106
ページ数6
ジャーナルProgress of Theoretical Physics Supplement
168
DOI
出版ステータス出版済み - 2007
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学(その他)

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