6533b7ddfe1ef96bd12740ad
RESEARCH PRODUCT
Anomalous electromagnetic moments of τ lepton in γγ → τ+τ− reaction in Pb+Pb collisions at the LHC
Matthias SchottMariola Klusek-gawendaAntoni SzczurekMateusz Dyndalsubject
PhysicsNuclear and High Energy PhysicsLuminosity (scattering theory)Large Hadron ColliderPhotonPhysics::Instrumentation and DetectorsHigh Energy Physics::Phenomenologylcsh:QC1-999Nuclear physicsCross section (physics)medicine.anatomical_structureAtlas (anatomy)medicinelcsh:PhysicsLeptondescription
We discuss the sensitivity of the γγ→τ+τ− process in ultraperipheral Pb+Pb collisions on the anomalous magnetic (aτ) and electric (dτ) moments of τ lepton at LHC energies. We derive the corresponding cross sections by folding the elementary cross section with the heavy-ion photon fluxes and considering semi-leptonic decays of both τ leptons in the fiducial volume of ATLAS and CMS detectors. We present predictions for total and differential cross sections, and for the ratios to γγ→e+e−(μ+μ−) process. These ratios allow to cancel theoretical and experimental uncertainties when performing precision measurements at the LHC. The expected limits on aτ with existing Pb+Pb dataset are found to be better by a factor of two comparing to current best experimental limits and can be further improved by another factor of two at High Luminosity LHC.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-10-01 | Physics Letters B |