Combination of the Searches for Pair-Produced Vectorlike Partners of the Third-Generation Quarks at √s=13 TeV with the ATLAS DetectorVise andre og tillknytning
Rekke forfattare: 29152018 (engelsk)Inngår i: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 121, nr 21, artikkel-id 211801Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]
A combination of the searches for pair-produced vectorlike partners of the top and bottom quarks in various decay channels (T -> Zt/Wb/Ht, B -> Zb/Wt/Hb) is performed using 36.1 fb(-1) of pp collision data at root s = 13 TeV with the ATLAS detector at the Large Hadron Collider. The observed data are found to be in good agreement with the standard model background prediction in all individual searches. Therefore, combined 95% confidence-level upper limits are set on the production cross section for a range of vectorlike quark scenarios, significantly improving upon the reach of the individual searches. Model-independent limits are set assuming the vectorlike quarks decay to standard model particles. A singlet T is excluded for masses below 1.31 TeV and a singlet B is excluded for masses below 1.22 TeV. Assuming a weak isospin (T, B) doublet and vertical bar V-Tb vertical bar << vertical bar V-tB vertical bar, T and B masses below 1.37 TeV are excluded.
sted, utgiver, år, opplag, sider
2018. Vol. 121, nr 21, artikkel-id 211801
HSV kategori
Identifikatorer
URN: urn:nbn:se:uu:diva-372456DOI: 10.1103/PhysRevLett.121.211801ISI: 000451008600002PubMedID: 30517796OAI: oai:DiVA.org:uu-372456DiVA, id: diva2:1275901
Forskningsfinansiär
Swedish Research CouncilEU, European Research CouncilEU, FP7, Seventh Framework ProgrammeEU, Horizon 2020
Merknad
For complete list of authors see http://dx.doi.org/10.1103/PhysRevLett.121.211801
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