Transversity Distributions and Tensor Charges of the Nucleon: Extraction from Dihadron Production and Their Universal Nature
Transversity Distributions and Tensor Charges of the Nucleon: Extraction from Dihadron Production and Their Universal Nature
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核子的横切分布和张量电荷：从双强子产生及其普遍性质中提取
DOI：
10.1103/physrevlett.132.091901
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发表时间：
2024
影响因子：
8.6
通讯作者：
Seidl, R.
中科院分区：
文献类型：
--
作者：
Cocuzza, C.;Metz, A.;Pitonyak, D.;Prokudin, A.;Sato, N.;Seidl, R.
我们对双强子产生进行了首次全局量子色动力学（QCD）分析，获得了电子-正电子湮灭、半包容性深非弹性散射和质子-质子碰撞的全面数据，从中我们同时提取了核子和双强子碎片函数的横向分布。我们将已知的横贯理论约束纳入拟合中，即其小渐近行为和 Soffer 界。我们还表明，张量电荷的晶格 QCD 结果可以成功地包含在分析中。这解决了之前报道的从双强子产生数据中提取的张量电荷与晶格 QCD 之间的不兼容性。我们还发现与从单强子产生测量中获得的横向和张量电荷的结果一致。总的来说，我们的工作首次证明了核子横断分布和张量电荷的所有可用信息的普遍性。
We perform the first global quantum chromodynamics (QCD) analysis of dihadron production for a comprehensive set of data in electron-positron annihilation, semi-inclusive deep-inelastic scattering, and proton-proton collisions, from which we extract simultaneously the transversity distributions of the nucleon anddihadron fragmentation functions. We incorporate in our fits known theoretical constraints on transversity, namely, its small-asymptotic behavior and the Soffer bound. We furthermore show that lattice-QCD results for the tensor charges can be successfully included in the analysis. This resolves the previously reported incompatibility between the tensor charges extracted from dihadron production data and lattice QCD. We also find agreement with results for the transversity and tensor charges obtained from measurements on single-hadron production. Overall, our work demonstrates for the first time the universal nature of all available information for the transversity distributions and the tensor charges of the nucleon.