发表机构
Baku State University; Institute of Physical Problems, Baku State University（巴库国立大学; 巴库国立大学物理问题研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究在NICA能量下计算了质子-质子碰撞中瞬发光子产生的夸克-反夸克对湮没过程的辐射修正，发现修正显著且满足特定关系，解析与模拟结果在中心区域高度一致。
AI 中文摘要
本文对在NICA能量$\sqrt{s}$=10 GeV质子-质子碰撞中瞬发光子产生的夸克-反夸克对湮没过程$q\bar{q} \rightarrow g\gamma$的量子色动力学和量子电动力学辐射修正进行了全面的理论和数值研究，具体包括以下三个子过程：1. $q\bar{q} \rightarrow q\bar{q}\gamma$，2. $q\bar{q} \rightarrow gg\gamma$，以及3. $q\bar{q} \rightarrow g\gamma\gamma$。利用FeynCalc对辐射修正的微分截面和双自旋不对称性$A_{LL}$进行了解析研究，并在PYTHIA 8.316中进行了模拟。辐射修正在低质子碰撞能量$\sqrt{s}$和小光子横动量$p_{T}$下显著。研究表明，夸克-反夸克对湮没过程的辐射修正满足以下关系：$$ 2. \sigma_{\sqrt{s}}(q\bar{q} \rightarrow gg\gamma) > 1. \sigma_{\sqrt{s}}(q\bar{q} \rightarrow q\bar{q}\gamma) > 3. \sigma_{\sqrt{s}}(q\bar{q} \rightarrow g\gamma\gamma) $$ $$ 1. \frac{d\sigma(q\bar{q} \rightarrow q\bar{q}\gamma)}{dp_{T}^{2}} > 3. \frac{d\sigma(q\bar{q} \rightarrow g\gamma\gamma)}{dp_{T}^{2}} > 2. \frac{d\sigma(q\bar{q} \rightarrow gg\gamma)}{dp_{T}^{2}} $$ 碰撞质子的极化对过程1. $q\bar{q} \rightarrow q\bar{q}\gamma$、2. $q\bar{q} \rightarrow gg\gamma$和3. $q\bar{q} \rightarrow g\gamma\gamma$的影响几乎相同，且上述关系在此情况下也成立。将FeynCalc中严格的领头阶解析计算结果与PYTHIA 8.316模拟结果直接比较，在中心运动学区域显示出极好的一致性。
英文摘要
In this work, a comprehensive theoretical and numerical study of the quantum-chromodynamic and quantum-electrodynamic radiative corrections: 1. $q\bar{q} \rightarrow q\bar{q}γ$, 2. $q\bar{q} \rightarrow ggγ$, and 3. $q\bar{q} \rightarrow gγγ$ to the annihilation of a quark-antiquark pair $q\bar{q} \rightarrow gγ$ of prompt photon production in proton-proton collisions at NICA energies $\sqrt{s}$ = 10 GeV was performed. The differential cross-sections and double spin asymmetries $A_{LL}$ of the radiative corrections were investigated analytically using the FeynCalc and modulated in PYTHIA 8.316. Radiative corrections are significant at low collision energies of protons $\sqrt{s}$ and small transverse momentum of photons $p_{T}$. It was shown that radiative corrections to the annihilation of a quark-antiquark pair process satisfy the following relations: $$ 2. σ_{\sqrt{s}}(q\bar{q} \rightarrow ggγ) > 1. σ_{\sqrt{s}}(q\bar{q} \rightarrow q\bar{q}γ) > 3. σ_{\sqrt{s}}(q\bar{q} \rightarrow gγγ) $$ $$ 1. \frac{dσ(q\bar{q} \rightarrow q\bar{q}γ)}{dp_{T}^{2}} > 3. \frac{dσ(q\bar{q} \rightarrow gγγ)}{dp_{T}^{2}} > 2. \frac{dσ(q\bar{q} \rightarrow ggγ)}{dp_{T}^{2}} $$ The polarization of colliding protons has almost the same effect on processes 1. $q\bar{q} \rightarrow q\bar{q}γ$, 2. $q\bar{q} \rightarrow ggγ$, and 3. $q\bar{q} \rightarrow gγγ$ and in this case above indicated relation is also satisfied. A direct comparison between strict leading order analytical calculations in FeynCalc and PYTHIA 8.316 modulations revealed excellent agreement in the central kinematic regions.
Commentspages 51, figures 78
