Search for supersymmetry in final states with charm jets and missing transverse momentum in 13 TeV pp collisions with the ATLAS detector

Abstract A search for supersymmetric partners of top quarks decaying as $$ {\tilde{t}}_1\to c{\tilde{\upchi}}_1^0 $$ t˜1→cχ˜10 and supersymmetric partners of charm quarks decaying as $$ {\tilde{c}}_1\to c{\tilde{\upchi}}_1^0 $$ c˜1→cχ˜10 , where $$ {\tilde{\upchi}}_1^0 $$ χ˜10 is the lightest neutralino, is presented. The search uses 36.1 fb−1ppcollision data at a centre-of-mass energy of 13 TeV collected by the ATLAS experiment at the Large Hadron Collider and is performed in final states with jets identified as containing charm hadrons. Assuming a 100% branching ratio to $$ c{\tilde{\upchi}}_1^0 $$ cχ˜10 , top and charm squarks with masses up to 850 GeV are excluded at 95% confidence level for a massless lightest neutralino. For $$ {m}_{{\tilde{t}}_1,{\tilde{c}}_1}-{m}_{{\tilde{\upchi}}_1^0} $$ mt˜1,c˜1−mχ˜10 < 100 GeV, top and charm squark masses up to 500 GeV are excluded.

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