Wh plus missing-Eₜ signature from gaugino pair production at the LHC

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In SUSY models with heavy squarks and gaugino mass unification, the gaugino pair production reaction pp-> ₁±₂ dominates gluino pair production for m 1 TeV at LHC with √s=14 TeV (LHC14). For this mass range, the two-body decays ₁→ W₁ and ₂→ h₁ are expected to dominate the chargino and neutralino branching fractions. By searching for ℓ bb+MET events from ₁±₂ production, we show that LHC14 with 100 fb⁻¹ of integrated luminosity becomes sensitive to chargino masses in the range m₁ 450-550 GeV corresponding to m 1.5-2 TeV in models with gaugino mass unification. For 10³ fb⁻¹, LHC14 is sensitive to the Wh channel for m₁ 300-800 GeV, corresponding to m 1-2.8 TeV, which is comparable to the reach for gluino pair production followed by cascade decays. The Wh+MET search channel opens up a new complementary avenue for SUSY searches at LHC, and serves to point to SUSY as the origin of any new physics discovered via multijet and multilepton + MET channels.