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arXiv 0810.4954hep-ph
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手征微扰理论中介子-重子散射振幅和重子极化的吸收部分

Absorptive part of meson--baryon scattering amplitude and baryon polarization in chiral perturbation theory

Antonio O. Bouzas

摘要:

本文用BChPT方法计算了初态非极化的两体介子-重子低能散射中末态重子在静止坐标系中的自旋不对称性和极化率,直到最低非平凡阶。所需的吸收幅度在一个回路的水平上得到解析。本文用数值方法讨论了几种介子-重子过程的极化结果。即使在阈值以上的低能量,其中BChPT可以合理地预期是适用的,相当大的值的极化被发现的一些过程。

英文摘要:

We compute the spin asymmetry and polarization of the final-state baryon in its rest frame in two-body meson--baryon low-energy scattering with unpolarized initial state, to lowest non-trivial order in BChPT. The required absorptive amplitudes are obtained analytically at one-loop level. We discuss the polarization results numerically for several meson--baryon processes. Even at low energies above threshold, where BChPT can reasonably be expected to be applicable, sizable values of polarization are found for some processes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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