论文标题
双方分布的动量总和规则和分解
Momentum sum rule and factorization of double parton distributions
论文作者
论文摘要
我们表明，动量总和规则是将双方分布分配到两个单个parton分布的产物中的必要条件，用于parton动量分数x的小值x和足够大的进化量表q值。这是一个令人惊讶的结果。由于动量总和规则涉及动量分数的所有值集成。从本质上讲，动量总和规则提供了双part顿分布之间的正确关系，这对于大$ q $的小X分解是必需的。
We show that the momentum sum rule is a necessary condition for factorization of double parton distributions into a product of two single parton distributions for small values of the parton momentum fractions x and large enough values of the evolution scale Q. This is a somewhat surprising result since the momentum sum rule involves integration over all values of the momentum fraction. In essence, the momentum sum rule provides a proper relation between the double and single parton distributions, which is necessary for the small x factorization at large $Q$.
