Boosted tau lepton as a microscope and macroscope
Abstract
Anomalies from the LHCb lepton flavour universality and Fermilab muon anomalous magnetic momentum, show tantalizing hints of possible new physics from the lepton sectors. Due to its large mass and shorter lifetime than muon, the tau lepton is believed to couple more to possible new physics beyond the standard model. Traditionally, tau leptons are probed through the decay products due to tau's short life time. On the other hand, at a high energy scale, a large fraction of tau leptons could be boosted to a much longer life time and fly a visible distance from several centimetres up to kilometer length scale, yet very informative to new physics beyond the standard model or high energy cosmic rays. In this article, we show unique yet promising tau physics by exploiting long-lived taus as a microscope or macroscope, to measure tau's anomalous magnetic momentum to an unprecedented level of accuracy and detect high energy cosmic neutrinos at the 1 TeV to 1 PeV scale, respectively.
Keywords
Cite
@article{arxiv.2201.07808,
title = {Boosted tau lepton as a microscope and macroscope},
author = {Sitian Qian and Zhe Guan and Sen Deng and Yunxuan Song and Tianyu Mu and Jie Xiao and Tianyi Yang and Siguang Wang and Yajun Mao and Qiang Li and Meng Lu and Zhengyun You},
journal= {arXiv preprint arXiv:2201.07808},
year = {2022}
}
Comments
6 pages, 5 figures; updated version to match the accepted one in Advances in High Energy Physics