| Title: |
Measurement of the top-quark Yukawa coupling from t t ¯ production in the lepton+jets final state using pp collisions at s = 13 TeV with the ATLAS detector |
| Authors: |
Aad, G; Aakvaag, E; Abbott, B; Abdelhameed, S; Abeling, K; Abicht, NJ; Abidi, SH; Aboelela, M; Aboulhorma, A; Abramowicz, H; Abulaiti, Y; Acharya, BS; Ackermann, A; Adam Bourdarios, C; Adamczyk, L; Addepalli, SV; Addison, MJ; Adelman, J; Adiguzel, A; Adye, T; Affolder, AA; Afik, Y; Agaras, MN; Aggarwal, A; Barr, AJ; Bortoletto, D; Bruckler, TL; Chen, M; Conroy, EI; Cooper-Sarkar, AM; Dingley, T; Eberwein, GH; Gallas, EJ; Grabarczyk, RP; Gwenlan, C; Haslbeck, F; Hays, CP; Hodkinson, BH; Homsak, V; Huffman, TB; Koch, SF; Molinatti, U; Nagai, K; Nedic, L; Nickerson, RB; Pacey, HA; Qichen, D; Rossi, E; Ruggiero, A; Shipsey, IPJ; Sultan, DMS; Tuncay, SB; Viehhauser, GHA; Wang, WT; Weidberg, AR; Yildirim, TP |
| Publisher Information: |
Springer |
| Publication Year: |
2026 |
| Collection: |
Oxford University Research Archive (ORA) |
| Description: |
The top-quark Yukawa coupling is extracted from the distribution of the top-quark pair (tt¯) invariant mass in proton-proton collisions using 140 fb−1 of data at s=13 TeV collected in 2015–2018 by the ATLAS experiment at the Large Hadron Collider. In the region near the production threshold, the tt¯ invariant mass spectrum is sensitive to electroweak virtual corrections, including contributions from Higgs boson exchange, thereby providing sensitivity to the top-quark Yukawa coupling. This is the first measurement in ATLAS that aims to obtain this coupling exploiting this approach. The tt¯ system is reconstructed in the single-lepton final state, requiring exactly one isolated electron or muon and at least four jets with at least two identified as originating from b-quarks. The measured Yukawa coupling is found to be in good agreement with the Standard Model prediction. An upper limit on the top-quark Yukawa coupling strength of Yt< 2.1 relative to the Standard Model prediction is observed at 95% confidence level, consistent with the expected sensitivity. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
https://doi.org/10.1007/jhep01(2026)117 |
| DOI: |
10.1007/jhep01(2026)117 |
| Availability: |
https://doi.org/10.1007/jhep01(2026)117; https://ora.ox.ac.uk/objects/uuid:185f7286-e592-420d-ae02-7e7820e5d809 |
| Rights: |
info:eu-repo/semantics/openAccess ; CC Attribution (CC BY) |
| Accession Number: |
edsbas.65329823 |
| Database: |
BASE |