Search for Large Extra Dimensions in the Monojet + Missing ET Channel at D0

TL;DR

This study searches for evidence of large extra dimensions in proton-antiproton collisions at 1.8 TeV, using monojet and missing energy signatures, but finds no excess and sets limits on the fundamental Planck scale.

Contribution

First search for large extra dimensions in monojet plus missing energy channel at the Tevatron with specific limits set on the Planck scale.

Findings

No excess events observed beyond standard model predictions.

Limits set on the fundamental Planck scale: 1 TeV for 2 ED, 0.6 TeV for 7 ED.

Data analyzed corresponds to 78.8 pb^-1 collected by D0.

Abstract

We present a search for large extra dimensions (ED) in p-pbar collisions at a center-of-mass energy of 1.8 TeV using data collected by the D0 detector at the Fermilab Tevatron in 1994-1996. Data corresponding to 78.8 +/- 3.9 pb^-1 are examined for events with large missing transverse energy, one high-p_T jet, and no isolated muons. With no excess beyond the background prediction from the standard model, we place limits on the fundamental Planck scale of 1 TeV (0.6 TeV) for 2 (7) ED.