Split-UED and Dark Matter

TL;DR

This paper proposes a split universal extra dimension model to explain cosmic ray excesses, predicts collider signatures for KK particles, and discusses bounds from collider searches.

Contribution

It introduces an anomaly-free split-UED model with localized quarks, providing new insights into dark matter and collider phenomenology.

Findings

Bound on 1/R > 510 GeV from Tevatron dijet searches

Potential to discover second KK gluon up to 4 TeV at LHC

Model explains cosmic ray electron and positron excesses

Abstract

Motivated by the recent observation of the high energy electron and positron excesses in cosmic ray by PAMELA and ATIC/PPB-BETS, we suggest an anomaly-free scenario for the universal extra dimension that localizes the SM quarks and splits the spectrum of KK quarks from KK leptons. When the SM quarks are "well localized" at the boundaries, the most stringent bound of the model ($1/R > 510$ GeV) comes from the resonance search for the Tevatron dijet channels. Even at the early stage of LHC, one can discover the second KK gluon for masses up to 4 TeV.