Probing electromagnetic moments of the tau lepton in PbPb collisions at the FCC-hh

Abstract

A production of a pair of tau leptons in PbPb collisions at the FCC-hh collider is examined. The 95\% C.L. exclusion limits, as well as 3$\sigma$ and 5$\sigma$ sensitivity limits on the anomaly magnetic moment of the tau lepton $a_{\tau }$ and its electric dipole moment $d_{\tau }$ are obtained. A comparison with bounds on $a_{\tau }$ and $d_{\tau }$ for other future colliders are given.

Comments: 29 pages, 6 figures, figs. 3-6 are replaced by new ones