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.