Search for W‧ → tb decays in the hadronic final state using pp collisions at √{ s } = 13TeV with the ATLAS detector
Abstract
A search for W‧-boson production in the W‧ → t b bar → qqbar‧ b b bar decay channel is presented using 36.1fb-1 of 13 TeV proton-proton collision data collected by the ATLAS detector at the Large Hadron Collider in 2015 and 2016. The search is interpreted in terms of both a left-handed and a right-handed chiral W‧ boson within the mass range 1-5 TeV. Identification of the hadronically decaying top quark is performed using jet substructure tagging techniques based on a shower deconstruction algorithm. No significant deviation from the Standard Model prediction is observed and the results are expressed as upper limits on the W‧ → t b bar production cross-section times branching ratio as a function of the W‧-boson mass. These limits exclude W‧ bosons with right-handed couplings with masses below 3.0 TeV and W‧ bosons with left-handed couplings with masses below 2.9 TeV, at the 95% confidence level.
- Publication:
-
Physics Letters B
- Pub Date:
- June 2018
- DOI:
- 10.1016/j.physletb.2018.03.036
- Bibcode:
- 2018PhLB..781..327A