Search for Large Extra Dimensions in Dielectron and Diphoton Production

TL;DR

This paper reports a search for large extra spatial dimensions in proton-antiproton collisions, finding no evidence but setting new lower limits on the effective Planck scale in various models.

Contribution

First search for large extra dimensions in dielectron and diphoton production at TeV energies with new lower limit constraints.

Findings

No evidence for large extra dimensions.

Set lower limits on the Planck scale between 1.0 and 1.4 TeV.

Most restrictive limits to date.

Abstract

We report a search for effects of large extra spatial dimensions in ppbar collisions at a center-of-mass energy of 1.8 TeV with the DZero detector, using events containing a pair of electrons or photons. The data are in good agreement with the expected background and do not exhibit evidence for large extra dimensions. We set the most restrictive lower limits to date, at the 95% confidence level, on the effective Planck scale between 1.0 TeV and 1.4 TeV for several formalisms and numbers of extra dimensions.