Search for new phenomena with the MT2 variable in the all-hadronic final state produced in proton–proton collisions at √s = 13TeV

Abstract

A search for new phenomena is performed using events with jets and significant transverse momentum imbalance, as inferred through the M-T2 variable. The results are based on a sample of proton-proton collisions collected in 2016 at a center-of-mass energy of 13 TeV with the CMS detector and corresponding to an integrated luminosity of 35.9 fb(-1). No excess event yield is observed above the predicted standard model background, and the results are interpreted as exclusion limits at 95% confidence level on the masses of predicted particles in a variety of simplified models of R-parity conserving supersymmetry. Depending on the details of the model, 95% confidence level lower limits on the gluino (light-flavor squark) masses are placed up to 2025 (1550) GeV. Mass limits as high as 1070 (1175) GeV are set on the masses of top (bottom) squarks. Information is provided to enable re-interpretation of these results, including model-independent limits on the number of non-standard model events for a set of simplified, inclusive search regions.Fonds pour la Formation a la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium)Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University (Thailand)Chulalongkom Academic into Its 2nd Century Project Advancement Project (Thailand)Agentschap voor Innovatie door Wetenschap en Technologic (IWT-Belgium)Mobility Plus program of the Ministry of Science and Higher EducationConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Ministry of Education, Youth and Sports (MEYS) of the Czech RepublicNational Priorities Research Program by Qatar National Research FundCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)