论文标题
tau g-2测量在重离子的超外膜碰撞中的可行性
Feasibility of tau g-2 measurements in ultra-peripheral collisions of heavy ions
论文作者
论文摘要
Tau Lepton的异常磁矩A_TAU =（G_TAU -2）/2是一种对新物理学的敏感探针，但与电子和MUON时刻相反，难以准确测量。 15年前，Delphi合作在E+E+E+E+e+e+tau+tau过程中的DITAU生产研究中设定了最佳的实验限制。 LHC处的重离子的超外外碰撞（UPC）可能会提供独特的机会，以改善PB+PB-> pb+pb+pb+pb+tau+tau过程中的A_TAU约束。我们审查了使用可用的ATLA和CMS数据中的Sagi-leptonic Tau衰变来研究DITAU生产的最新建议，并通过Alice和LHCB实验讨论了探索该过程的可行性，以探索这一过程的衰减液体的低横向动量。
The anomalous magnetic moment of the tau lepton, a_tau = (g_tau - 2)/2, is a sensitive probe of new physics but is extremely difficult to measure precisely in contrast to electron and muon moments. The best experimental limits were set by the DELPHI collaboration more than 15 years ago in studies of the ditau production in the e+e -> e+e+tau+tau process. Ultra-peripheral collisions (UPCs) of heavy ions at the LHC may provide a unique opportunity to improve the a_tau constraints in the studies of Pb+Pb -> Pb+Pb+tau+tau process. We review recent proposals to study ditau production via semi-leptonic tau decays in Pb-Pb UPC with the available ATLAS and CMS data and discuss the feasibility to explore this process down to low transverse momenta of decay leptons with the ALICE and LHCb experiments.
