arXiv journal 2022.0210

最新推荐文章于 2023-07-25 23:40:50 发布

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两篇论文分别探讨了小x和低Q2区域的结构函数。第一篇针对Longitudinal结构函数FL的模型进行了更新，考虑了EIC的前景，该模型基于低Q2的光子胶子融合机制并包含高阶扭结贡献。第二篇论文则通过两种不同类型的胶子密度研究了质子结构，涉及CSS方程和BFKL形式主义，旨在探索小x环境下质子内部胶子的内在运动和全面成像。

Longitudinal structure function FL at low Q2 and low x with model for higher twist: an update
https://arxiv.org/pdf/2202.04223.pdf

abstract: A reanalysis of the model for the longitudinal structure function FL(x, Q2) at low x and low Q2 was undertaken, in view of the advent of the EIC. The model is based on the photon-gluon fusion mechanism suitably extrapolated to the region of low Q2. It includes the kinematic constraint FL ∼ Q4 as Q2 → 0 and higher twist contribution which vanishes as Q2 → ∞. Revised model was critically updated and compared to the presently available data.

Phenomenology of the hadronic structure at small-x
https://arxiv.org/pdf/2202.04207.pdf

abstract: We present exploratory studies of the proton structure via two distinct kinds of gluon densities: the transverse-momentum dependent functions, whose evolution is determined by the CSS equation, and the unintegrated gluon distribution, whose definition is given in the BFKL formalism. Our analyses are relevant for the exploration of the intrinsic motion of gluons inside protons in the small-x regime, and for a comprehensive tomographic imaging of the proton at new-generation colliding facilities.