Department of Physics, University of Oxford, Oxford OX1 3RH, United Kingdom.
Phys Rev Lett. 2019 Oct 4;123(14):141801. doi: 10.1103/PhysRevLett.123.141801.
We propose a search strategy using the LHC as a photon collider to open sensitivity to scalar lepton (slepton ℓ[over ˜]) production with masses around 15 to 60 GeV above that of neutralino dark matter χ[over ˜]{1}^{0}. This region is favored by relic abundance and muon (g-2){μ} arguments. However, conventional searches are hindered by the irreducible diboson background. We overcome this obstruction by measuring initial state kinematics and the missing momentum four-vector in proton-tagged ultraperipheral collisions using forward detectors. We demonstrate sensitivity beyond LEP for slepton masses of up to 200 GeV for 15≲Δm(ℓ[over ˜],χ[over ˜]_{1}^{0})≲60 GeV with 100 fb^{-1} of 13 TeV proton collisions. We encourage the LHC collaborations to open this forward frontier for discovering new physics.
我们提出了一种使用 LHC 作为光子对撞机的搜索策略，以提高对质量在中性微子 χ[over ˜]{1}^{0} 之上 15 到 60GeV 左右的标量轻子 (slepton ℓ[over ˜]) 产生的灵敏度。这个区域受到了 relic abundance 和 muon (g-2){μ} 的支持。然而，传统的搜索受到不可约双玻色子背景的阻碍。我们通过使用前向探测器测量质子标记的超边缘碰撞中的初始状态运动学和缺失动量四矢量来克服这一障碍。我们展示了在 13 TeV 质子碰撞中，使用 100 fb^{-1} 的数据，在 15≲Δm(ℓ[over ˜],χ[over ˜]_{1}^{0})≲60 GeV 的范围内，对于高达 200GeV 的 slepton 质量，灵敏度超过了 LEP。我们鼓励 LHC 合作开展这一前向前沿的工作，以发现新物理。
