Wy Production and Limits on Anomalous WWy Couplings in pp̅ Collisions √s = 1.96 TeV

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 Snow, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

2011

Citation

PHYSICAL REVIEW LETTERS 107, 241803 (2011); DOI: 10.1103/PhysRevLett.107.241803

Comments

Copyright 2011 American Physical Society

Abstract

We measure the cross section and the difference in rapidities between photons and charged leptons for inclusive W(→ lv) + y production in ey and µy final states. Using data corresponding to an integrated luminosity of 4.2 fb^-1 collected with the D0 detector at the Fermilab Tevatron Collider, the measured cross section times branching fraction for the process pp̅ → Wy + X → lvy + X and the distribution of the charge-signed photon-lepton rapidity difference are found to be in agreement with the standard model. These results provide the most stringent limits on anomalous WW[1] couplings for data from hadron colliders: -0.4 < ∆k_y < 0.4 and -0.08 < λ_y < 0.07 at the 95% C.L.