Combination of the Searches for Pair-Produced Vectorlike Partners of the Third-Generation Quarks at root s=13 TeV with the ATLAS DetectorShow others and affiliations
Number of Authors: 29152018 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 121, no 21, article id 211801Article in journal (Refereed) 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.
Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2018. Vol. 121, no 21, article id 211801
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-239998DOI: 10.1103/PhysRevLett.121.211801ISI: 000451008600002PubMedID: 30517796Scopus ID: 2-s2.0-85057470814OAI: oai:DiVA.org:kth-239998DiVA, id: diva2:1269342
Note
QC 20181210
2018-12-102018-12-102022-06-26Bibliographically approved