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We study dimuon events in 2.11/fb of 7 TeV pp collisions, using CMS OpenData, and search for a narrow dimuon resonance with moderate mass (14-66 GeV)and substantial transverse momentum (pT). Applying dimuon pT cuts of 25 GeV and60 GeV, we explore two overlapping samples: one with isolated muons, and onewith prompt muons without an isolation requirement. Using the latter samplerequires information about detector effects and QCD backgrounds, which weobtain directly from the CMS Open Data. We present model-independent limits onthe product of cross section, branching fraction, acceptance, and efficiencies.These limits are stronger, relative to a corresponding inclusive search withouta pT cut, by factors of as much as nine. Our "pT-enhanced" dimuon searchstrategy provides improved sensitivity to models in which a new particle isproduced mainly in the decay of something heavier, as could occur, for example,in decays of the Higgs boson or of a TeV-scale top partner. An implementationof this method with the current 13 TeV data should improve the sensitivity tosuch signals further by roughly an order of magnitude.

Searching in CMS Open Data for Dimuon Resonances with Substantial Transverse Momentum