Number Density Interpretation of Dihadron Fragmentation Functions
Number Density Interpretation of Dihadron Fragmentation Functions
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双强子碎裂函数的数密度解释
DOI：
10.1103/physrevlett.132.011902
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发表时间：
2024
影响因子：
8.6
通讯作者：
Sato, N.
中科院分区：
文献类型：
--
作者：
Pitonyak, D.;Cocuzza, C.;Metz, A.;Prokudin, A.;Sato, N.
我们给出了一种新的量子场论定义的完全非积分双强子碎裂函数(DIFS)，并给出了一种推广的强子碎裂函数。我们证明了这个定义允许满足某些和规则，使它与数密度解释一致。此外，我们还展示了进入现有唯象研究的相应的所谓扩展差是如何成为数密度的，并导出了它们的演化方程。在这个新的框架内，从实验测量中提取的差异将具有明确的物理意义。
We present a new quantum field-theoretic definition of fully unintegrated dihadron fragmentation functions (DiFFs) as well as a generalized version for-hadron fragmentation functions. We demonstrate that this definition allows certain sum rules to be satisfied, making it consistent with a number density interpretation. Moreover, we show how our corresponding so-called extended DiFFs that enter existing phenomenological studies are number densities and also derive their evolution equations. Within this new framework, DiFFs extracted from experimental measurements will have a clear physical meaning.