Speaker
Description
Ultra-peripheral heavy-ion collisions provide a unique opportunity to study two-photon induced processes. The production of tau lepton pairs in the process $\mathrm{Pb}+\mathrm{Pb} \rightarrow \mathrm{Pb}+\mathrm{Pb} + \tau^{+}\tau^{-}$ at the LHC is particularly interesting since its cross section is sensitive to poorly known electromagnetic moments of the $\tau$-lepton. Possible deviations of the anomalous magnetic moment $a_{\tau}= (g-2)/2$ of the $\tau$-lepton from the Standard Model predictions may indicate the presence of effects beyond the Standard Model, such as contributions of supersymmetric particles or composite nature of the $\tau$-lepton. In this contribution, the prospects of exclusive ditau cross section measurements in ultra-peripheral Pb-Pb collisions at the LHC will be discussed and projections for possible $a_{\tau}$ limits will be presented.
This work was supported by the Russian Foundation for Basic Research (RFBR, 21-52-14006) and the Austrian Science Fund (FWF, I 5277-N).
