Search for Dark Matter and Supersymmetry with a Compressed Mass Spectrum in the Vector Boson Fusion Topology in Proton-Proton Collisions at √s =8 TeV

Abstract

A first search for pair production of dark matter candidates through vector boson fusion in proton-proton collisions at root s = 8 TeV is performed with the CMS detector. The vector boson fusion topology enhances missing transverse momentum, providing a way to probe supersymmetry, even in the case of a compressed mass spectrum. The data sample corresponds to an integrated luminosity of 18.5 fb(-1), recorded by the CMS experiment. The observed dijet mass spectrum is consistent with the standard model expectation. In an effective field theory, dark matter masses are explored as a function of contact interaction strength. The most stringent limit on bottom squark production with mass below 315 GeV is also reported, assuming a 5 GeV mass difference with respect to the lightest neutralino.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)Chulalongkorn Academic into Its 2nd Century Project Advancement Project (Thailand)Mobility Plus program of the Ministry of Science and Higher Education (Poland)Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium)Conselho 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 FundScience and Technology Facilities Council: ST/K001639/1 CMS Upgrades