Electroweak backgrounds in Di-Photon Analyses at CMS

ORAL

Abstract

New physics could be revealed in a final state with two high $E_T$ photons and large missing transverse energy, for example in Gauge Mediated SUSY breaking theories. Here we present a strategy for coping with the relevant electroweak backgrounds. Electroweak backgrounds are primarily from $W\gamma$ and $Wj$ events where the W decays into an electron and neutrino. If an electron track is not reconstructed, the electron will pass the photon identification. By determining the photon identification efficiency from $Z\rightarrow ee$ events, we can estimate the missing $E_T$ background by scaling electroweak events with respect to the signal.

*We'd like to acknowledge that this work was done under the Office of Science of the Department of Energy grant \# DE-FG02-04ER41290.

–

Authors

  • Bernadette Heyburn

    • University of Colorado at Boulder
    • University of Colorado

  • Andrew Askew

    • Rutgers University

  • Yuri Gershtein

    • Rutgers University

  • Gail Hansen

    • University of California, Riverside

  • Robert Stringer

    • University of California, Riverside

  • Uriel Nauenberg

    • University of Colorado

  • Shilei Zang

    • University of Colorado

  • Daniele Del Re

    • Universita di Roma ``La Sapienza"

  • Shahram Rahatlou

    • Universita di Roma ``La Sapienza"

  • Michael Balazs

    • University of Virginia

  • Brad Cox

    • University of Virginia