Zɤ production and limits on anomalous ZZɤ and Zɤɤ couplings in pp̅ collisions at √s= 1.96

Authors

V. M. Abazov, Joint Institute for Nuclear Research, Dubna, Russia
Kenneth A. Bloom, University of Nebraska-LincolnFollow
Daniel R. Claes, University of Nebraska-LincolnFollow
Kayle DeVaughan, University of Nebraska-Lincoln
Aaron Dominguez, University of Nebraska-LincolnFollow
Michael Eads, University of Nebraska-LincolnFollow
Ioannis Katsanos, University of Nebraska-LincolnFollow
Sudhir Malik, University of Nebraska-LincolnFollow
Gregory R. Snow, University of Nebraska-LincolnFollow
D0 Collaboration

Date of this Version

2012

Citation

PHYSICAL REVIEW D 85, 052001 (2012); DOI: 10.1103/PhysRevD.85.052001

Comments

Copyright 2012 American Physical Society

Abstract

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/dp^ɤ_T, where p^ɤ_T 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.