论文标题
在LHC的固定目标碰撞中探测隐藏的底部
Probing hidden-bottom pentaquarks in fixed-target collisions at the LHC
论文作者
论文摘要
在本文中，我们调查了在LHC在光子诱导的相互作用中搜索隐藏底的五夸克状态的可能性。我们考虑在$γp\rightarrowυp$反应的$ s $ channel中存在$ p_b $共振，并在LHC的固定目标模式下估算了其对独家$υ$光增生的贡献。考虑到$ pb-p $，$ pb-he $和$ pb-ar $固定目标碰撞的星光蒙特卡洛（Monte Carlo），使用星光蒙特卡洛（Starlight Monte Carlo）来得出了总横截面，速度和横向动量分布的预测。我们的结果表明，$ p_b $共振的存在意味着在LHCB检测器覆盖的运动学范围内的速度分布有所提高。我们证明，如果在最终状态的速度和横向动量上施加了运动学削减，则$ P_B $的贡献会占主导地位。这些结果表明，对固定目标碰撞中$υ$光生生的实验分析可以提供对这些状态存在的互补和独立检查，并有助于理解其潜在的性质。
In this paper we investigate the possibility of searching for the hidden-bottom pentaquark states in photon-induced interactions at the LHC. We consider the presence of the $P_b$ resonance in the $s$-channel of the $γp \rightarrow Υp$ reaction and estimate its contribution for the exclusive $Υ$ photoproduction in the fixed-target mode of the LHC. Predictions for the total cross sections, rapidity and transverse momentum distributions are derived using the STARlight Monte Carlo considering $Pb-p$, $Pb-He$ and $Pb-Ar$ fixed-target collisions at the LHC. Our results indicate that the presence of the $P_b$ resonance implies an enhancement in the rapidity distribution in the kinematical range covered by the LHCb detector. We demonstrate that the $P_b$ contribution for the $Υ$ photoproduction becomes dominant if kinematical cuts are imposed on the rapidity and transverse momentum of the final state. These results indicate that an experimental analysis of the $Υ$ photoproduction in fixed-target collisions can provide complementary and independent checks of the existence of these states, and help to understand their underlying nature.
