Measurement of the cross-section of Zγ and limits on ADD models at the CMS with 7 TeV Large Hadron Collider data

Abstract

The measurement of the inclusive cross-section for Zγ production at LHC with 7 TeV proton–proton collision is presented. The electron and muon decay modes are used to reconstruct the Z boson. The total cross-section is measured for photon transverse energy greater than 10 GeV and with photon and charged lepton separation in the pseudorapidity-azimuthal angle plane greater than 0.7. This study is extended by a measurement of $Z(\nu\bar{\nu})\gamma$ cross-section. A search is performed for extra dimensions in the Arkani-Hamed, Dimopoulos, Dvali framework using the final state of a graviton and photon. The limits are extended with MD > 1.25–1.31 TeV for n = 2–6. The measurement is found to be in agreement with the Standard Model prediction.