Speaker
Description
The measurement of the anomalous magnetic moment of leptons $a_l$ provides a sensitive test of QED and allows one to test for the existence of New Physics (NP) beyond the Standard Model. Since the NP effect is expected to scale with $m_l^2$, the tauon with its heavy mass promises to be the most suitable lepton for such a test. However, due to its short lifetime, the spin precessing methods used to determine $a_{e, \mu}$ with high accuracy cannot be applied in this case. Alternatively, one can exploit the fact that the $\gamma-\tau$ vertex is sensitive to $a_{\tau}$, such as in the $\gamma + \gamma \rightarrow \tau + \tau$ process. Ultraperipheral PbPb collisions (UPCs) at the LHC provide a clean environment to study two-photon induced processes. In this talk, we discuss the prospects of measuring $a_{\tau}$ in UPCs with ALICE at the LHC with data from the ongoing Run 3 data campaign.
Name of collaboration or list of co-authors
ALICE
