"CMS Makes Landmark Discovery: Photons Transform into Taus in Proton-Proton Collisions"

The CMS collaboration has observed the creation of two tau leptons from two photons in proton-proton collisions for the first time, providing the most precise measurement of the tau's anomalous magnetic moment and offering a new way to constrain the existence of new physics. This breakthrough was made possible by the precise tracking capabilities of the CMS detector, and the new method reduces the uncertainty from predictions to only three times the size of the quantum corrections, revitalizing measurements that have remained stagnant for more than two decades.