产生瞬发光子的硬轫致辐射
Hard bremsstrahlung for the production of prompt photons
AI总结：
本文基于旋量形式体系给出硬光子和胶子轫致辐射螺旋度振幅的解析计算，并在SANC框架下对NICA质子碰撞极化观测量提供理论支持。
AI中文摘要：
利用旋量形式体系，描述了类型为 $\ar{q} q \ o g γ$ 和 $q g \ o q γ$ 过程中硬光子和胶子轫致辐射螺旋度振幅的解析计算。所给出的振幅以场强双矢量表示，并考虑了所有粒子的螺旋度和质量的依赖关系。针对夸克-反夸克湮灭过程 $\ar{c}c$，在质心能量为 24、91 和 500 GeV 的条件下进行了数值计算，考虑了末态夸克和光子螺旋度的各种组合。本研究是基于 SANC 系统的理论支持持续发展的一部分，旨在分析 NICA 对撞机上质子碰撞中的极化观测量。
英文摘要：
The analytical calculation of helicity amplitudes for hard photon and gluon bremsstrahlung radiation are described using the spinor formalism for processes of the type $\bar{q} q \to g γ$ and $q g \to q γ$. The presented amplitudes are expressed in terms of field strength bivectors, with allowance for the dependence on the helicities and masses of all particles. Numerical calculations have been performed for the quark-antiquark annihilation process $\bar{c}c$ at the center-of-mass energies of 24, 91, and 500 GeV, considering various combinations of helicities of the quarks and the photon in the final state. This study is part of the ongoing development of theoretical support, based on the SANC system, for the analysis of polarized observables in proton collisions at the NICA collider.
