LHC tau-pair production constraints on aτ and dτ
U. Haisch, L. Schnell, J. Weiss
We point out that relevant constraints on the anomalous magnetic (aτ) and electric (dτ) moment of the tau lepton can be derived from tau-pair production measurements performed at the LHC. Our conclusion is based on the observation that the leading relative deviations from the Standard Model prediction for pp→τ+τ− due to aτ and dτ are enhanced at high energies. Less precise measurements at hadron colliders can therefore offer the same or better sensitivity to new physics with respect to high-precision low-energy measurements performed at lepton machines. We derive bounds on aτ and dτ using the full LHC Run II data set on tau-pair production and compare our findings with the current best limits on the tau anomalous moments.