第5卷‧第1期,
198101
, pp. 8-16
正反夸克偶之能距及輕子衰變寬度
- 作者:
李健二; 黃文宏; 王孟忠
- 作者服務機構:
國立成功大學物理學系
- 中文摘要:
藉微擾法,我們導出新的對數位能,它明白包含夸克之質量,並證明其強度與量子色動力學之強作用偶合常數成比例。使夸克離閉它的質層,我們導出夸克偶之S 及 D分波輕子衰變公式,它明白包含了束縛因子,分別為(1+2 M /M ) 及(1+2 m /M ) ,這些新公式之預測值與實驗值頗為吻合,當夸克質量增大時,其預測值顯較一般所用之輕子衰變公式之預測值為小。
- 英文摘要:
By means of the perturbatfon method, we derive a modified logarilthmic potential which clearlyexhibits quark mass dependence and whose strenglh is shown to be proportional to the running couplingconstant αs of the quantum chromodynamics. By taking the momenta off the quark mass shell, we obtainthe modified formulas for leptonic widths of the S- and D- wave quarkonia. which clearly exhibits thebinding effect via the binding factors(1+2m /M ) and(l+2 m /M ) ,respectively. The predictions ofthese new formuhs are in good agreement with the experimental data and become smaller than predietionsfor the leptonie widths given by the usual formulas as the quark mass increases.
- 中文關鍵字:
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- 英文關鍵字:
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