发表机构
Institute of Nuclear Physics Polish Academy of Sciences; Institut für Theoretische Physik, Universität Heidelberg; University of Rzeszów(波兰科学院核物理研究所; 海德堡大学理论物理研究所; 热舒夫大学)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
本文用张量坡密子方法研究LHC上质子碰撞中η和η'介子的中心独生产,给出13 TeV下截面预测,证明该方法可探测坡密子本质。
AI 中文摘要
我们利用张量坡密子方法讨论了高能质子-质子碰撞中$\eta$和$\eta'(958)$介子的中心独生产(CEP),并在振幅层面纳入吸收效应。模型参数通过WA102实验在$\sqrt{s} = 29.1$ GeV下测得的数据进行约束。我们给出了LHC能量$\sqrt{s} = 13$ TeV下的截面和微分分布。对于$pp \to pp \eta$,在$|\eta_{M}| < 1$时总截面上限为2.5 $\mu$b,在$2 < \eta_{M} < 5$时为5.6 $\mu$b。对于$pp \to pp \eta'$,在相应的赝快度区间内预测截面分别为0.3--0.7 $\mu$b和0.9--2.1 $\mu$b。这些结果表明,研究衍射味单态赝标量介子产生以探究LHC上坡密子本质的可行性。
英文摘要
We discuss central exclusive production (CEP) of $η$ and $η'(958)$ mesons in high-energy proton-proton collisions using the tensor-pomeron approach, incorporating absorption effects at the amplitude level. Model parameters are constrained using WA102 experimental data measured at $\sqrt{s} = 29.1$ GeV. We present cross sections and differential distributions for the LHC energy of $\sqrt{s} = 13$ TeV. For $pp \to pp η$, the upper limit of the total cross section is 2.5 $μ$b for $|η_{M}| < 1$ and 5.6 $μ$b for $2 < η_{M} < 5$. For $pp \to pp η'$, the predicted cross sections are 0.3--0.7 $μ$b and 0.9--2.1 $μ$b in the respective pseudorapidity regions. These results demonstrate the feasibility of studying diffractive flavour singlet pseudoscalar meson production to probe the nature of the pomeron at the LHC.
Comments7 pages, 5 figures. Proceedings of the 18th International Workshop on Meson Physics (MESON2026), Kraków, Poland, 2026 June 25-30