标题： 探测B介子的强相互作用和重子结构的半轻子衰变 显示英文标题

标题： Probing hadron structure and strong interactions with inclusive semileptonic decays of B mesons

摘要： 从探测强相互作用和强子结构的角度分析了$B$介子的包括性半轻子衰变。 给出了任意参考系中微分衰变率的一般公式，考虑了带电轻子质量的有限性。 这些公式可用于结构函数的测量。 结构函数的行为被证明包含有关$B$介子组成和强相互作用动力学的信息。 对结构函数的测量将揭示$B$介子中点状$b$夸克的存在，确立$b$夸克的自旋为 1/2，并确定$B$介子的$b$量子数。 这些测量将确定$b$夸克分布函数，并提供关于禁闭本质的新见解。 $b$夸克分布函数也可以通过相对于标度变量$\xi_+$的衰变分布测量直接提取。 显示英文摘要

摘要： The study of inclusive semileptonic decays of $B$ mesons is analyzed from the viewpoint of probing hadron structure and strong interactions. General formulas for the differential decay rates are given in terms of the structure functions in arbitrary frame of reference, taking into account the finite charged lepton mass. These formulas can be used for structure function measurements. The behavior of the structure functions is shown to contain information on the constitution of the $B$ meson and the dynamics of strong interactions. Measurements of the structure functions would reveal the existence of a point-like $b$ quark in the $B$ meson, establish the spin 1/2 nature of the $b$ quark, and identify the $b$ quantum number of the $B$ meson. These measurements would determine the $b$ quark distribution function, and allow new insight into the nature of confinement. The $b$ quark distribution function can also be extracted directly through the measurements of the decay distributions with respect to the scaling variable $\xi_+$.