Theories with gapped continuum spectra have gotten some attention, either as pure 4D models like unparticles, or in 5D realizations as certain soft walls constructions. In this paper, we derive experimental bounds from Drell-Yan processes (pp → ℓ⁺ℓ⁻, pp → ℓ^±ν) in a particular scenario where the electroweak bosons propagate in an extra dimension that produces a propagator with a continuum spectrum, on top of the isolated corresponding Standard Model pole. Using current LHC data we put a lower bound on the gap of 4.2 TeV (expected), 6.2 TeV (observed, bins with < 10 events combined) at 95% CL, with some dependence in the observed limit on how low statistics bins are treated. We also study the limits for HL-LHC.

带间隙连续谱的理论已经引起了一些关注，无论是作为非粒子等纯 4D 模型，还是作为某些软墙结构的 5D 实现。在本文中，我们从 Drell-Yan 过程 ( pp → ℓ ⁺ ℓ ⁻ , pp → ℓ ^± ν ) 中得出实验界限，其中电弱玻色子在额外维度中传播，产生具有连续谱的传播子，隔离相应标准模型杆的顶部。使用当前的 LHC 数据，我们将 95% CL 的差距下限设置为 4.2 TeV（预期）、6.2 TeV（观察到的，合并< 10 个事件的箱），观察到的限制在一定程度上取决于处理低统计箱的方式。我们还研究了 HL-LHC 的限制。