Early SUSY discovery at LHC via sparticle cascade decays to same-sign and multimuon states

TL;DR

This paper proposes a method for early supersymmetry discovery at the LHC using same-sign and multimuon signals, which are less affected by detector uncertainties and do not rely on missing energy cuts.

Contribution

It introduces a new approach focusing on muon channels without missing energy cuts for early SUSY detection at the LHC.

Findings

LHC at 10 TeV can detect gluinos up to 450-550 GeV with minimal data.

Same-sign dimuon signals provide a promising early SUSY discovery channel.

Background rates are manageable without missing energy cuts.

Abstract

In the very early stages of LHC running, uncertainties in detector performance will lead to large ambiguities in jet, electron and photon energy measurements, along with inferred missing transverse energy. However, muon detection should be quite straightforward, with the added benefit that muons can be reliably detected down to transverse energies of order 5 GeV. Supersymmetry discovery through multimuon channels has been extensively explored in the literature, but always relying on hard ET^miss cuts. Here, we quantify signal and background rates for same-sign (SS) dimuon and multimuon production at the LHC without any ET^miss cuts. The LHC, operating at \sqrt{s}=10 TeV, should be able to discover a signal over expected background consistent with gluino pair production for m_{\tg}\alt 450 (550) GeV in the SS dimuon plus \ge 4 jets state with just 0.1 (0.2) fb^{-1} of integrated luminosity.