Superpartner mass measurements with 1D decomposed MT2

Understand

We propose a new model-independent technique for mass measurements in missing energy events at hadron colliders.

• We illustrate our method with the most challenging case of a short, single-step decay chain.
• We consider inclusive same-sign chargino pair production in supersymmetry, followed by leptonic decays to sneutrinos.
• We introduce two one-dimensional decompositions of the Cambridge MT2 variable: MT2_\parallel and MT2_\perp, on the direction of the upstream transverse momentum PT and the direction orthogonal to it, respectively.