论文标题
标量和伪库夏米尼的中央独家生产在轻率$ k_t $ -FACTORIZIADY中
Central exclusive production of scalar and pseudoscalar charmonia in the light-front $k_T$-factorization approach
论文作者
论文摘要
我们研究了标量$χ_{C0} \equivχ_c（0^{++}）$的独家生产$和伪cal $η_c$ charmonia nates in Proton-Proton碰撞在LHC Energies中。 $ gg \ toχ_{C0} $以及$ gg \ toη_c$机制的振幅是在$ k_ {t} $ - 分解方法中得出的。首次讨论$ p p \ to ppη_c$反应。我们已经计算了速度，横向动量分布以及相关性可观察到的相关性，例如相对方位角和$（T_1，T_2）$分布的分布。后两个可观察到$χ_{C0} $和$η_C$ case的可观察结果非常不同。与最近在文献中考虑的这些媒介物的包容性生产相反，在独有的情况下，$η_c$的横截面远低于$χ_{C0} $的横截面，这是由于用于计算交叉部分的相应顶点的特殊相互作用和相应的diaogonal UGDF的特殊相互作用。我们在潜在模型的框架框架中介绍了关键可观察物的数值结果。我们还讨论了这两种情况下的吸收性校正如何不同。
We study exclusive production of scalar $χ_{c0}\equiv χ_c(0^{++})$ and pseudoscalar $η_c$ charmonia states in proton-proton collisions at the LHC energies. The amplitudes for $gg \to χ_{c0}$ as well as for $gg \to η_c$ mechanisms are derived in the $k_{T}$-factorization approach. The $p p \to p p η_c$ reaction is discussed for the first time. We have calculated rapidity, transverse momentum distributions as well as such correlation observables as the distribution in relative azimuthal angle and $(t_1,t_2)$ distributions. The latter two observables are very different for $χ_{c0}$ and $η_c$ cases. In contrast to the inclusive production of these mesons considered very recently in the literature, in the exclusive case the cross section for $η_c$ is much lower than that for $χ_{c0}$ which is due to a special interplay of the corresponding vertices and off-diagonal UGDFs used to calculate the cross sections. We present the numerical results for the key observables in the framework of potential models for the light-front quarkonia wave functions. We also discuss how different are the absorptive corrections for both considered cases.
