@article{57cc7c4b97494ce58d0b335d7592a219,
title = "Search for pair-production of vector-like quarks in pp collision events at s=13 TeV with at least one leptonically decaying Z boson and a third-generation quark with the ATLAS detector",
abstract = "A search for the pair-production of vector-like quarks optimized for decays into a Z boson and a third-generation Standard Model quark is presented, using the full Run 2 dataset corresponding to 139fb−1 of pp collisions at s=13TeV, collected in 2015–2018 with the ATLAS detector at the Large Hadron Collider. The targeted final state is characterized by the presence of a Z boson with high transverse momentum, reconstructed from a pair of same-flavour leptons with opposite-sign charges, as well as by the presence of b-tagged jets and high-transverse-momentum large-radius jets reconstructed from calibrated smaller-radius jets. Events with exactly two or at least three leptons are used, which are further categorized by the presence of boosted W, Z, and Higgs bosons and top quarks. The categorization is performed using a neural-network-based boosted object tagger to enhance the sensitivity to signal relative to the background. No significant excess above the background expectation is observed and exclusion limits at 95% confidence level are set on the masses of the vector-like partners T and B of the top and bottom quarks, respectively. The limits depend on the branching ratio configurations and, in the case of 100% branching ratio for T→Zt and 100% branching ratio for B→Zb, this search sets the most stringent limits to date, allowing mT>1.60TeV and mB>1.42TeV, respectively.",
author = "{The ATLAS collaboration} and G. Aad and B. Abbott and K. Abeling and Abicht, {N. J.} and Abidi, {S. H.} and A. Aboulhorma and H. Abramowicz and H. Abreu and Y. Abulaiti and Acharya, {B. S.} and {Adam Bourdarios}, C. and L. Adamczyk and Addepalli, {S. V.} and Addison, {M. J.} and J. Adelman and A. Adiguzel and T. Adye and Affolder, {A. A.} and Y. Afik and Agaras, {M. N.} and J. Agarwala and A. Aggarwal and C. Agheorghiesei and A. Ahmad and F. Ahmadov and Ahmed, {W. S.} and S. Ahuja and X. Ai and G. Aielli and A. Aikot and {Ait Tamlihat}, M. and B. Aitbenchikh and I. Aizenberg and M. Akbiyik and {\AA}kesson, {T. P.A.} and Akimov, {A. V.} and D. Akiyama and Akolkar, {N. N.} and {Al Khoury}, K. and Alberghi, {G. L.} and J. Albert and P. Albicocco and Albouy, {G. L.} and S. Alderweireldt and M. Aleksa and Aleksandrov, {I. N.} and C. Alexa and T. Alexopoulos and F. Alfonsi and Citron, {Z. H.} and Abbott, {D. C.} and {Abed Abud}, A. and Abhayasinghe, {D. K.} and {Abusleme Hoffman}, {A. C.} and B. Achkar and L. Adam and L. Adamek and S. Adorni and C. Agapopoulou and Aguilar-Saavedra, {J. A.} and S. Akatsuka and {Alconada Verzini}, {M. J.} and S. Istin and E. Kajomovitz and M. Morgenstern and Y. Rozen and S. Tarem and D. Melini and C. Appelt and L. Barak and U. Barron and G. Bella and Y. Benhammou and Biswal, {J. P.} and H. Cohen and E. Etzion and Frid, {Y. Y.} and G. Koren and O. Kuprash and Lutz, {M. S.} and R. Nayak and G. Ninio and {Pascual Dominguez}, L. and D. Reikher and {Salvador Salas}, A. and A. Soffer and Tamir, {N. M.} and D. Vannicola",
note = "Publisher Copyright: {\textcopyright} 2023 The Author(s)",
year = "2023",
month = aug,
day = "10",
doi = "10.1016/j.physletb.2023.138019",
language = "American English",
volume = "843",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
publisher = "Elsevier B.V.",
}