Gluino reach and mass extraction at the LHC in radiatively-driven natural SUSY

Authors

Howard Baer, University of OklahomaFollow
Vernon Barger, University of WisconsinFollow
James S. Gainer, University of HawaiiFollow
Peisi Huang, University of ChicagoFollow
Michael Savoy, University of OklahomaFollow
Dibyashree Sengupta, University of OklahomaFollow
Xerxes Tata, University of HawaiiFollow

Document Type

Article

Date of this Version

2017

Citation

Eur. Phys. J. C (2017) 77:499

Comments

© The Author(s) 2017.

This article is an open access publication

DOI 10.1140/epjc/s10052-017-5067-3

Abstract

Radiatively-driven natural SUSY (RNS) models enjoy electroweak naturalness at the 10% level while respecting LHCsparticle and Higgs mass constraints. Gluino and top-squark masses can range up to several TeV (with other squarks even heavier) but a set of light Higgsinos are required with mass not too far above m_h ~ 125 GeV. Within the RNS framework, gluinos dominantly decay via [?], [?] or [?], where the decay products of the higgsino-like [?] and [?] are very soft. Gluino pair production is, therefore, signaled by events with up to four hard b-jets and large [?]. We devise a set of cuts to isolate a relatively pure gluino sample at the (high-luminosity) LHC and show that in the RNS model with very heavy squarks, the gluino signal will be accessible for [?] < 2400 (2800) GeV for an integrated luminosity of 300 (3000) fb^-1. We also show that the measurement of the rate of gluino events in the clean sample mentioned above allows for a determination of [?] with a statistical precision of 2–5% (depending on the integrated luminosity and the gluino mass) over the range of gluino masses where a [?] discovery is possible at the LHC.