Stable solutions for q(q) bound states with a regularized Breit potential

The Breit interaction contains singular terms which may lead to an instability in quark-antiquark bound state calculations. We regularize the Breit interaction by multiplying the singular terms in momentum space by the form factor μ2/(q2+μ2) such that the interaction is not singular at the origin and the intermediate-and long-range parts of the interaction remain unchanged. The singular terms in the Breit potential find their stable contributions in the calculations after being multiplied by the form factor with different powers. Such a regularized Breit potential with a linear and a relativistically corrected confining potential are applied to the study of qq bound states. The spectra for most familiar mesons are consistently obtained and agree well with the experimental data.

作 者： Jirimutu ZHANG Wei-Ning   作者單位： Jirimutu(Department of Physics, Haerbin Institute of Technology, Haerbin 150006, China)

ZHANG Wei-Ning(Department of Physics, Haerbin Institute of Technology, Haerbin 150006, China;School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China;Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China) 

刊 名： 中國物理C（英文版）  ISTIC 英文刊名： CHINESE PHYSICS　C  年，卷(期)： 2009 33(8)  分類號： O4  關鍵詞： quark model   regularized Breit potential   meson spectra   relativistically corrected confining potential  

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