Search for photonic signatures of gauge-mediated supersymmetry in 13 TeV p p collisions with the ATLAS detector

F. MONTICELLI,ATLAS COLLABORATION

PHYSICAL REVIEW D

AMER PHYSICAL SOC

Lugar: New York; Año: 2018

1550-7998

A search is presented for photonic signatures, motivated by generalized models of gauge-mediated supersymmetry breaking. This search makes use of proton?proton collision data at√s = 13 TeV corresponding to an integrated luminosity of 36.1 fb −1 recorded by the ATLASdetector at the LHC, and it explores models dominated by both strong and electroweak pro-duction of supersymmetric partner states. Experimental signatures incorporating an isolatedphoton and significant missing transverse momentum are explored. These signatures includeevents with an additional photon or additional jet activity not associated with any specificunderlying quark flavor. No significant excess of events is observed above the Standard Modelprediction, and 95% confidence-level upper limits of between 0.083 fb and 0.32 fb are set onthe visible cross section of contributions from physics beyond the Standard Model. Theseresults are interpreted in terms of lower limits on the masses of gluinos, squarks, and gauginosin the context of generalized models of gauge-mediated supersymmetry, which reach as highas 2.3 TeV for strongly produced and 1.3 TeV for weakly produced supersymmetric partnerpairs.