Rimoldi, Marco; Mullier, Geoffrey; Miucci, Antonio; Merlassino, Claudia; Haug, Sigve; Weber, Michael; Meloni, Federico; Beck, Hans Peter; Ereditato, Antonio (2018). Search for pair production of heavy vector-like quarks decaying into hadronic final states in pp collisions at √s = 13 TeV with the ATLAS detector. Physical review. D - particles, fields, gravitation, and cosmology, 98(9) American Physical Society 10.1103/PhysRevD.98.092005
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A search is presented for the pair production of heavy vectorlike quarks, TT̅ or BB̅, that decay into final states with jets and no reconstructed leptons. Jets in the final state are classified using a deep neural networkas arising from hadronically decaying W/Z bosons, Higgs bosons, top quarks, or background. The analysis uses data from the ATLAS experiment corresponding to 36.1fb⁻¹ of proton-proton collisions with acenter-of-mass energy of √s = 13TeV delivered by the Large Hadron Collider in 2015 and 2016. No significant deviation from the Standard Model expectation is observed. Results are interpreted assuming the vectorlike quarks decay into a Standard Model boson and a third-generation-quark, T→Wb, Ht, Zt B→Wt, Hb, Zb, for a variety of branching ratios. At 95% confidence level, theobserved (expected) lower limit on the vectorlike B-quark mass for a weak-isospin doublet (B,Y) is 950 (890) GeV, and the lower limits on the masses for the pure decays B→Hb andT→Ht, where these results are strongest, are 1010 (970) GeV and 1010 (1010) GeV, respectively.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) |
UniBE Contributor: |
Haug, Sigve, Weber, Michele, Beck, Hans Peter |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1550-7998 |
Publisher: |
American Physical Society |
Language: |
English |
Submitter: |
BORIS Import LHEP |
Date Deposited: |
18 Jun 2019 08:27 |
Last Modified: |
05 Dec 2022 15:27 |
Publisher DOI: |
10.1103/PhysRevD.98.092005 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autoren namentlich erwaehnt |
BORIS DOI: |
10.7892/boris.129020 |
URI: |
https://boris.unibe.ch/id/eprint/129020 |
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