Date of this Version
PHYSICAL REVIEW D 85, 052001 (2012); DOI: 10.1103/PhysRevD.85.052001
We present a measurement of pp̅ →Zɤ→ℓ+ℓ-ɤ(ℓ=e, µ) production with a data sample corresponding to an integrated luminosity of 6.2 fb-1 collected by the D0 detector at the Fermilab Tevatron pp Collider. The results of the electron and muon channels are combined, and we measure the total production cross section and the differential cross section dσ/dpɤT, where pɤT is the momentum of the photon in the plane transverse to the beam line. The results obtained are consistent with the standard model predictions from next-to-leading order calculations. We use the transverse momentum spectrum of the photon to place limits on anomalous ZZɤ and Zɤɤ couplings.