Search for tt̅ resonances in final states with exactly one or two leptons using 140 fb−1 of pp collision data at √s=13 TeV with the ATLAS experiment

@article{collaboration2026search,
  title = {{Search for $$ t\overlinet $$ resonances in final states with exactly one or two leptons using 140 fb−1 of pp collision data at $$ \sqrts=13 $$ TeV with the ATLAS experiment}},
  author = {The ATLAS collaboration and G. Aad and E. Aakvaag and B. Abbott and S. Abdelhameed and K. Abeling and N. J. Abicht and S. H. Abidi and M. Aboelela and A. Aboulhorma and H. Abramowicz and B. S. Acharya and A. Ackermann and C. Adam Bourdarios and L. Adamczyk and S. V. Addepalli and M. J. Addison and J. Adelman and A. Adiguzel and T. Adye and A. A. Affolder and Y. Afik and M. N. Agaras and A. Aggarwal and C. Agheorghiesei and F. Ahmadov and S. Ahuja and S. Ahuja and X. Ai and G. Aielli and A. Aikot and M. Ait Tamlihat and B. Aitbenchikh and T. P. A. Åkesson and D. Akiyama and N. N. Akolkar and S. Aktas and G. L. Alberghi and J. Albert and U. Alberti and P. Albicocco and G. L. Albouy and S. Alderweireldt and Z. L. Alegria and M. Aleksa and I. N. Aleksandrov and C. Alexa and T. Alexopoulos and F. Alfonsi and M. Algren and M. Alhroob and B. Ali and H. M. J. Ali and S. Ali and S. W. Alibocus and M. Aliev and G. Alimonti and W. Alkakhi and C. Allaire and B. M. M. Allbrooke},
  journal = {Journal of High Energy Physics},
  year = {2026},
  month = oct,
  doi = {10.1007/jhep10(2026)219},
  url = {https://link.springer.com/article/10.1007/JHEP10(2026)219},
  note = {CC BY 4.0},
}

TY  - JOUR
TI  - Search for tt̅ resonances in final states with exactly one or two leptons using 140 fb−1 of pp collision data at √s=13 TeV with the ATLAS experiment
AU  - The ATLAS collaboration
AU  - G. Aad
AU  - E. Aakvaag
AU  - B. Abbott
AU  - S. Abdelhameed
AU  - K. Abeling
AU  - N. J. Abicht
AU  - S. H. Abidi
AU  - M. Aboelela
AU  - A. Aboulhorma
AU  - H. Abramowicz
AU  - B. S. Acharya
AU  - A. Ackermann
AU  - C. Adam Bourdarios
AU  - L. Adamczyk
AU  - S. V. Addepalli
AU  - M. J. Addison
AU  - J. Adelman
AU  - A. Adiguzel
AU  - T. Adye
AU  - A. A. Affolder
AU  - Y. Afik
AU  - M. N. Agaras
AU  - A. Aggarwal
AU  - C. Agheorghiesei
AU  - F. Ahmadov
AU  - S. Ahuja
AU  - S. Ahuja
AU  - X. Ai
AU  - G. Aielli
AU  - A. Aikot
AU  - M. Ait Tamlihat
AU  - B. Aitbenchikh
AU  - T. P. A. Åkesson
AU  - D. Akiyama
AU  - N. N. Akolkar
AU  - S. Aktas
AU  - G. L. Alberghi
AU  - J. Albert
AU  - U. Alberti
AU  - P. Albicocco
AU  - G. L. Albouy
AU  - S. Alderweireldt
AU  - Z. L. Alegria
AU  - M. Aleksa
AU  - I. N. Aleksandrov
AU  - C. Alexa
AU  - T. Alexopoulos
AU  - F. Alfonsi
AU  - M. Algren
AU  - M. Alhroob
AU  - B. Ali
AU  - H. M. J. Ali
AU  - S. Ali
AU  - S. W. Alibocus
AU  - M. Aliev
AU  - G. Alimonti
AU  - W. Alkakhi
AU  - C. Allaire
AU  - B. M. M. Allbrooke
PY  - 2026
DA  - 2026/10/21
JO  - Journal of High Energy Physics
DO  - 10.1007/jhep10(2026)219
UR  - https://link.springer.com/article/10.1007/JHEP10(2026)219
AB  - A bstract : A search for heavy spin-1 and spin-2 resonances decaying into a top-antitop-quark pair has been performed with 140 fb − 1 of proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider at a centre-of-mass energy of √s=13 s = 13 TeV. Final states with either exactly one electron or muon, or exactly two leptons ( ee , μμ or eμ ), large missing transverse momentum, and two jets, at least one of which must be identified as likely containing a b -hadron decay, are considered. The search targets resonances with both narrow and broad widths relative to the detector resolution, and with masses in the range of 0.4–5.0 TeV. No significant deviation from the Standard Model prediction is observed. Exclusion limits are set on the production cross-section times branching ratio for hypothetical Z′ bosons, Kaluza-Klein gravitons, and Kaluza-Klein gluons that decay into top-quark pairs.
SN  - 1029-8479
ER  -