Search for Large extra spatial dimensions in the dielectron and diphoton channels in $\bm{p\bar{p}}$ collisions at $\bm{\sqrt{s}=}$1.96 TeV

TL;DR

This paper searches for evidence of large extra spatial dimensions in dielectron and diphoton events at the Tevatron collider, setting lower limits on the effective Planck scale based on observed data.

Contribution

It provides new experimental limits on the size of extra dimensions by analyzing collision data at 1.96 TeV, extending previous constraints.

Findings

No significant deviation from the standard model observed.

Lower limits on the effective Planck scale range from 1.3 to 2.1 TeV.

Results constrain theories with large extra dimensions.

Abstract

We report on a search for large extra spatial dimensions in the dielectron and diphoton channels using a data sample of 1.05 \invfb of \ppb collisions at a center-of-mass energy of 1.96 TeV collected by the D0 detector at the Fermilab Tevatron Collider. The invariant mass spectrum of the data agrees well with the prediction of the standard model. We find 95% C.L. lower limits on the effective Planck scale between 2.1 and 1.3 TeV for 2 to 7 extra dimensions.