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Measurement of the top-quark Yukawa coupling fromtt̅production in the lepton+jets final state using pp collisions at√s̅=13TeV with the ATLAS detector

by Walkowiak, W. , Garcia Alonso, A. , Watson, H. , Introzzi, G. , Arbiol Val, S. J. , Pan, J. , Gao, Y. , Strom, D. M. , Albouy, G. L. , Meyer, J-P. , Ling, J. , Ezhilov, A. , Mo, C. , Fabbri, L. , Jia, H. , Carminati, L. , Snyder, R. M. , Cantero, J. , Hsu, S.-C. , Pedro, R. , Carlotto, J. I. , Meyer, C. , Guerrieri, G. , Mellado Garcia, B. R. , Mulski, A. E. , Zhang, P. , Diaz, M. A. , Dudarev, A. , Shi, X. , Atmani, H. , Foll, M. , Borissov, G. , Kajomovitz, E. , Brüers, B. , Moyano Gomez, H. , Yang, Y. , Algren, M. , Catmore, J. R. , Calafiura, P. , Garg, R. B. , Gonzalez-Sevilla, S. , Korn, A. , Shaheen, R. , Bhopatkar, V. S. , Simpson, E. L. , Hessey, N. P. , Inacio Goncalves, G. , Zhang, S. , Grabarczyk, R. P. , Zhukov, K. , Golubkov, D. , Kang, N. J. , Krüger, H. , Principe Martin, M. A. , Pintucci, L. , Thornberry, R. E. , Hamdaoui, H. , Gazis, E. N. , Vokac, P. , Hawkings, R. J. , Busch, E. L. , Melo, A. H. , Yang, X. , Kim, Y. K. , Tu, Y. , Schwarz, T. A. , De Almeida Rossi, C. , Calace, N. , Zoccoli, A. , Jia, J. , Viehhauser, G. H. A. , Pettee, M. , Revering, M. M. , Tariq, K. , Huang, S. , Junkermann, T. , Veloso, F. , Zhang, R. , Tikhomirov, V. , Dervan, P. , Nelson, K. , Aboelela, M. , Davidek, T. , Taylor Vara, R.

in Hadron-Hadron Scattering / Higgs Physics / Top Physics

2026

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Measurement of the top-quark Yukawa coupling fromtt̅production in the lepton+jets final state using pp collisions at√s̅=13TeV with the ATLAS detector

in Hadron-Hadron Scattering / Higgs Physics / Top Physics

2026

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Measurement of the top-quark Yukawa coupling fromtt̅production in the lepton+jets final state using pp collisions at√s̅=13TeV with the ATLAS detector

in Hadron-Hadron Scattering / Higgs Physics / Top Physics

2026

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Journal Article

Measurement of the top-quark Yukawa coupling fromtt̅production in the lepton+jets final state using pp collisions at√s̅=13TeV with the ATLAS detector

Walkowiak, W.,

Garcia Alonso, A.,

Watson, H.,

Introzzi, G.,

Arbiol Val, S. J.,

Pan, J.,

Gao, Y.,

Strom, D. M.,

Albouy, G. L.,

Meyer, J-P.,

Ling, J.,

Ezhilov, A.,

Mo, C.,

Fabbri, L.,

Jia, H.,

Carminati, L.,

Snyder, R. M.,

Cantero, J.,

Hsu, S.-C.,

Pedro, R.,

Carlotto, J. I.,

Meyer, C.,

Guerrieri, G.,

Mellado Garcia, B. R.,

Mulski, A. E.,

Zhang, P.,

Diaz, M. A.,

Dudarev, A.,

Shi, X.,

Atmani, H.,

Foll, M.,

Borissov, G.,

Kajomovitz, E.,

Brüers, B.,

Moyano Gomez, H.,

Yang, Y.,

Algren, M.,

Catmore, J. R.,

Calafiura, P.,

Garg, R. B.,

Gonzalez-Sevilla, S.,

Korn, A.,

Shaheen, R.,

Bhopatkar, V. S.,

Simpson, E. L.,

Hessey, N. P.,

Inacio Goncalves, G.,

Zhang, S.,

Grabarczyk, R. P.,

Zhukov, K.,

Golubkov, D.,

Kang, N. J.,

Krüger, H.,

Principe Martin, M. A.,

Pintucci, L.,

Thornberry, R. E.,

Hamdaoui, H.,

Gazis, E. N.,

Vokac, P.,

Hawkings, R. J.,

Busch, E. L.,

Melo, A. H.,

Yang, X.,

Kim, Y. K.,

Tu, Y.,

Schwarz, T. A.,

De Almeida Rossi, C.,

Calace, N.,

Zoccoli, A.,

Jia, J.,

Viehhauser, G. H. A.,

Pettee, M.,

Revering, M. M.,

Tariq, K.,

Huang, S.,

Junkermann, T.,

Veloso, F.,

Zhang, R.,

Tikhomirov, V.,

Dervan, P.,

Nelson, K.,

Aboelela, M.,

Davidek, T.,

Taylor Vara, R.

2026

Overview

The top-quark Yukawa coupling is extracted from the distribution of the top-quark pair (tt̅) invariant mass in proton-proton collisions using 140 fb−1 of data at √s̅=13 TeV collected in 2015–2018 by the ATLAS experiment at the Large Hadron Collider. In the region near the production threshold, the tt̅ 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 tt̅ 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.

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Publisher

Springer Science and Business Media LLC

Subject

Hadron-Hadron Scattering

/ Higgs Physics

/ Top Physics