Search for Kaluza-Klein Graviton Emission in $p\bar{p}$ Collisions at $\sqrt{s}=1.8$ TeV using the Missing Energy Signature

TL;DR

This paper searches for Kaluza-Klein graviton production in proton-antiproton collisions at 1.8 TeV, using missing energy signatures to set limits on the effective Planck scale in extra-dimensional models.

Contribution

It provides the first experimental limits on Kaluza-Klein graviton production at TeV energies in a collider setting, testing models with extra spatial dimensions.

Findings

Excluded effective Planck scale below 1.0 TeV for n=2

Excluded below 0.77 TeV for n=4

Excluded below 0.71 TeV for n=6

Abstract

We report on a search for direct Kaluza-Klein graviton production in a data sample of 84 ${pb}^{-1}$ of \ppb collisions at $\sqrt{s}$ = 1.8 TeV, recorded by the Collider Detector at Fermilab. We investigate the final state of large missing transverse energy and one or two high energy jets. We compare the data with the predictions from a $3+1+n$-dimensional Kaluza-Klein scenario in which gravity becomes strong at the TeV scale. At 95% confidence level (C.L.) for $n$=2, 4, and 6 we exclude an effective Planck scale below 1.0, 0.77, and 0.71 TeV, respectively.