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Superpartner Mass Measurement Technique using 1D Orthogonal Decompositions of the Cambridge Transverse Mass Variable<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>M</mml:mi><mml:mrow><mml:mi>T</mml:mi><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math>
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 single-step decay chain. We consider inclusive same-sign chargino pair production in supersymmetry, followed by leptonic decays to sneutrinos ${\ensuremath{\chi}}^{+}{\ensuremath{\chi}}^{+}\ensuremath{\rightarrow}{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{'}+}{\stackrel{\texttildelow{}}{\ensuremath{\nu}}}_{\ensuremath{\ell}}{\stackrel{\texttildelow{}}{\ensuremath{\nu}}}_{{\ensuremath{\ell}}^{\ensuremath{'}}}$ and invisible decays ${\stackrel{\texttildelow{}}{\ensuremath{\nu}}}_{\ensuremath{\ell}}\ensuremath{\rightarrow}{\ensuremath{\nu}}_{\ensuremath{\ell}}{\stackrel{\texttildelow{}}{\ensuremath{\chi}}}_{1}^{0}$. …