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Search for top squark production in fully hadronic final states in proton-proton collisions at $\sqrt{s}$ =13 TeV

CMS Collaboration; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Bergauer, T.; Chatterjee, S.; Dragicevic, M.; Escalante Del Valle, A.; Frühwirth, R.; Jeitler, M.; Krammer, N.; Lechner, L.; Liko, D.; Mikulec, I.; Pitters, F. M.; Schieck, J.; Schöfbeck, R.; Spanring, M.; ... mehr


A search for production of the supersymmetric partners of the top quark, top squarks, is presented. The search is based on proton-proton collision events containing multiple jets, no leptons, and large transverse momentum imbalance. The data were collected with the CMS detector at the CERN LHC at a center-of-mass energy of 13 TeV, and correspond to an integrated luminosity of 137  fb$^{-1}$. The targeted signal production scenarios are direct and gluino-mediated top squark production, including scenarios in which the top squark and neutralino masses are nearly degenerate. The search utilizes novel algorithms based on deep neural networks that identify hadronically decaying top quarks and W bosons, which are expected in many of the targeted signal models. No statistically significant excess of events is observed relative to the expectation from the standard model, and limits on the top squark production cross section are obtained in the context of simplified supersymmetric models for various production and decay modes. Exclusion limits as high as 1310 GeV are established at the 95% confidence level on the mass of the top squark for direct top squark production models, and as high as 2260 GeV on the mass of the gluino for gluino-mediated top squark production models. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000137743
Veröffentlicht am 23.09.2021
DOI: 10.1103/PhysRevD.104.052001
Zitationen: 18
Web of Science
Zitationen: 7
Zitationen: 9
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Theoretische Teilchenphysik (TTP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2470-0010, 0556-2821, 1089-4918, 1538-4500, 1550-2368, 1550-7998, 2470-0029
KITopen-ID: 1000137743
Erschienen in Physical Review D
Verlag American Physical Society (APS)
Band 104
Heft 5
Seiten Art. Nr.: 052001
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Vorab online veröffentlicht am 10.09.2021
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