| Title: |
Measurement of the top-quark Yukawa coupling from tt¯ 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; Agheorghiesei, C; Ahmadov, F; Ahuja, S; Ai, X; Aielli, G; Aikot, A; Ait Tamlihat, M; Aitbenchikh, B; Åkesson, TPA; Akimov, AV; Akiyama, D; Akolkar, NN; Aktas, S; Alberghi, GL; Albert, J; Alberti, U; Albicocco, P; Albouy, GL; Alderweireldt, S; Alegria, ZL; Aleksa, M; Aleksandrov, IN; Alexa, C; Alexopoulos, T; Alfonsi, F; Algren, M; Alhroob, M; Ali, B; Ali, HMJ; Ali, S; Alibocus, SW; Aliev, M; Alimonti, G; Alkakhi, W; Allaire, C; Allbrooke, BMM; Allen, DR; Allen, JS; Allen, JF; Allport, PP; Aloisio, A; Alonso, F; Alpigiani, C; Alsolami, ZMK; Alvarez Fernandez, A; Alves Cardoso, M; Alviggi, MG; Aly, M; Amaral Coutinho, Y; Ambler, A; Amelung, C; Amerl, M; Ames, CG; Amezza, T; Amidei, D; Amini, B; Amirie, K; Amirkhanov, A; Amor Dos Santos, SP; Amos, KR; Amperiadou, D; An, S; Anastopoulos, C; Andeen, T; Anders, JK; Anderson, AC; Andreazza, A; Angelidakis, S; Angerami, A; Anisenkov, AV; Annovi, A; Antel, C; Antipov, E; Antonelli, M; Anulli, F |
| Source: |
Journal of High Energy Physics, vol 2026, iss 1 |
| Publisher Information: |
eScholarship, University of California |
| Publication Year: |
2026 |
| Collection: |
University of California: eScholarship |
| Subject Terms: |
5106 Nuclear and Plasma Physics (for-2020); 5107 Particle and High Energy Physics (for-2020); 51 Physical Sciences (for-2020); Top Physics; Hadron-Hadron Scattering; Higgs Physics; 0105 Mathematical Physics (for); 0202 Atomic; Molecular; Nuclear; Particle and Plasma Physics (for); 0206 Quantum Physics (for); Nuclear & Particles Physics (science-metrix); 4902 Mathematical physics (for-2020) |
| Description: |
The top-quark Yukawa coupling is extracted from the distribution of the top-quark pair (tt¯$$ t\overline{t} $$) invariant mass in proton-proton collisions using 140 fb−1 of data at s=13$$ \sqrt{s}=13 $$ TeV collected in 2015–2018 by the ATLAS experiment at the Large Hadron Collider. In the region near the production threshold, the tt¯$$ t\overline{t} $$ 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¯$$ t\overline{t} $$ 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: |
unknown |
| Relation: |
qt0vf4n9pm; https://escholarship.org/uc/item/0vf4n9pm |
| DOI: |
10.1007/jhep01(2026)117 |
| Availability: |
https://escholarship.org/uc/item/0vf4n9pm; https://doi.org/10.1007/jhep01(2026)117 |
| Rights: |
CC-BY-NC |
| Accession Number: |
edsbas.4EF018B2 |
| Database: |
BASE |