arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2301.01083hep-ph
收藏

小$x$下由未积分胶子分布得到的偶极截面

The dipole cross section by the unintegrated gluon distribution at small $x$

G. R. Boroun

AI总结:

本研究在$k_t$因子化框架下,将改进饱和模型纳入未积分胶子分布计算小$x$处的次领头阶偶极截面,验证了模型的几何标度性及与现有模型的一致性,覆盖宽范围动量转移与$x$区间。

摘要:

我们应用先前建立的方案,自洽地纳入用于未积分胶子分布(UGD)的改进饱和模型,以在$k_t$因子化框架下,于小$x$处计算$\u03b1_s$的次领头阶(NLO)修正。我们从质子电磁散射的深度非弹结构函数参数化出发构建未积分胶子分布,随后提取色偶极截面;在与UGD模型(M. Hentschinski、A. Sabio Vera和C. Salas(HSS)、I.P.Ivanov和N.N.Nikolaev(IN)以及G. Watt、A.D. Martin和M.G. Ryskin(WMR))的对比中,该截面在宽范围$k_t^2$内均保持良好的行为一致性。这些结果表明,几何标度性在改进饱和模型的宽运动学区域$rQ_s$内成立,且与Golec-Biernat-Wüsthoff(GBW)模型的结果相当。本文还研究了宽$x$范围内低、高动量转移下的未积分胶子分布。

英文摘要:

We apply a previously developed scheme to consistently include the improved saturation model for the unintegrated gluon distribution (UGD) in order to evaluate, in the framework of $k_{t}$ factorization, at small $x$ at the next-to-leading order (NLO) in $α_{s}$. We start the unintegrated gluon distribution with a parametrization of the deep inelastic structure function for electromagnetic scattering with protons, and then extract the color dipole cross section, which preserves its behavior success in a wide range of $k_{t}^{2}$ in comparisons with the UGD models (M. Hentschinski, A. Sabio Vera and C. Salas (HSS), I.P.Ivanov and N.N.Nikolaev (IN) and G. Watt, A.D. Martin and M.G. Ryskin (WMR)) . These results show that the geometric scaling holds for the improved saturation model in a wide kinematic region $rQ_{s}$, and are comparable with the Golec-Biernat-W$\ddot{\mathrm{u}}$sthoff (GBW) model. The unintegrated gluon distribution at low and high momentum transfer in a wide range of $x$ is considered.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑