PreprintCC BY 4.0HAL
Search for a top-philic heavy resonance in association with top quarks in pp collisions at $\sqrt{s} = $ 13 TeV and 13.6 TeV with the ATLAS detector
Abstract
A search for a new top-philic vector boson (Z') produced in association with a top-quark or a pair of top quarks, and decaying into a top quark pair is presented. The search uses pp collision data collected by the ATLAS detector at the Large Hadron Collider at centre-of-mass energies of √s = 13 TeV and 13.6 TeV, corresponding to integrated luminosities of 140 fb−1 and 56 fb−1, respectively. Events containing exactly two same-sign leptons or at least three leptons (electrons or muons) are selected. A transformer-based classifier parameterised as a function of the Z' mass is used to optimise the signal-to-background discrimination. The results are interpreted in a simplified model with a colour-singlet vector boson coupled to top quarks with coupling strength ct and chirality angle θ. No significant excess is observed above the expected Standard Model background. A Z' boson with mass below 1150 GeV is excluded at 95% confidence level for a benchmark scenario with ct = 1 and θ= 0, with an expected limit of 1250 GeV.
Related
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- Search for charginos and neutralinos with B−L R-parity violating decays in √s=13 TeV and $13.6$ TeV pp collisions with the ATLAS detector
- Search for a leptoquark in events with a hadronically decaying τ-lepton and missing transverse momentum using pp collisions at s=13TeV with the ATLAS detector
BibTeX
@misc{aad2026search,
title = {{Search for a top-philic heavy resonance in association with top quarks in $pp$ collisions at $\sqrts = $ 13 TeV and 13.6 TeV with the ATLAS detector}},
author = {Georges Aad and Erlend Aakvaag and Braden Keim Abbott and Sara Abdelhameed and Kira Abeling and Nils Julius Abicht and Haider Abidi and Mohammed Aboelela and Asmaa Aboulhorma and Halina Abramowicz and Bobby Samir Acharya and Anke Ackermann and Jona Ackerschott and Claire Adam Bourdarios and Leszek Adamczyk and Sagar Addepalli and Matt Addison and Jahred Adelman and Aytul Adiguzel and Tim Adye and Tony Affolder and Yoav Afik and Merve Nazlim Agaras and Anamika Aggarwal and Catalin Agheorghiesei and Ammara Ahmad and Faig Ahmadov and Sonakshi Ahuja and Xiaocong Ai and Giulio Aielli and Arya Aikot and Malak Ait Tamlihat and Torsten Akesson and Daiya Akiyama and Sina Aktas and Gian Luigi Alberghi and Justin Albert and Una Helena Alberti and Pietro Albicocco and Sara Alderweireldt and Zackary Lee Alegria and Martin Aleksa and Igor Alexandrov and Calin Alexa and Theodoros Alexopoulos and Fabrizio Alfonsi and Malte Algren and Muhammad Alhroob and Babar Ali and Hanadi Ali and Shahzad Ali and Samuel William Alibocus and Malik Aliev and Gianluca Alimonti and Corentin Allaire and Benedict Allbrooke and Derrick Allen and Jonny Allen and Camron Stephen Alley and Earl Russel Tang Almazan},
howpublished = {HAL},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.24950},
eprint = {2609.24950},
archivePrefix = {arXiv},
url = {https://hal.science/hal-05780367v1},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Search for a top-philic heavy resonance in association with top quarks in pp collisions at $\sqrt{s} = $ 13 TeV and 13.6 TeV with the ATLAS detector
AU - Georges Aad
AU - Erlend Aakvaag
AU - Braden Keim Abbott
AU - Sara Abdelhameed
AU - Kira Abeling
AU - Nils Julius Abicht
AU - Haider Abidi
AU - Mohammed Aboelela
AU - Asmaa Aboulhorma
AU - Halina Abramowicz
AU - Bobby Samir Acharya
AU - Anke Ackermann
AU - Jona Ackerschott
AU - Claire Adam Bourdarios
AU - Leszek Adamczyk
AU - Sagar Addepalli
AU - Matt Addison
AU - Jahred Adelman
AU - Aytul Adiguzel
AU - Tim Adye
AU - Tony Affolder
AU - Yoav Afik
AU - Merve Nazlim Agaras
AU - Anamika Aggarwal
AU - Catalin Agheorghiesei
AU - Ammara Ahmad
AU - Faig Ahmadov
AU - Sonakshi Ahuja
AU - Xiaocong Ai
AU - Giulio Aielli
AU - Arya Aikot
AU - Malak Ait Tamlihat
AU - Torsten Akesson
AU - Daiya Akiyama
AU - Sina Aktas
AU - Gian Luigi Alberghi
AU - Justin Albert
AU - Una Helena Alberti
AU - Pietro Albicocco
AU - Sara Alderweireldt
AU - Zackary Lee Alegria
AU - Martin Aleksa
AU - Igor Alexandrov
AU - Calin Alexa
AU - Theodoros Alexopoulos
AU - Fabrizio Alfonsi
AU - Malte Algren
AU - Muhammad Alhroob
AU - Babar Ali
AU - Hanadi Ali
AU - Shahzad Ali
AU - Samuel William Alibocus
AU - Malik Aliev
AU - Gianluca Alimonti
AU - Corentin Allaire
AU - Benedict Allbrooke
AU - Derrick Allen
AU - Jonny Allen
AU - Camron Stephen Alley
AU - Earl Russel Tang Almazan
PY - 2026
DA - 2026/09/21
PB - HAL
DO - 10.48550/arxiv.2609.24950
UR - https://hal.science/hal-05780367v1
AB - A search for a new top-philic vector boson (Z') produced in association with a top-quark or a pair of top quarks, and decaying into a top quark pair is presented. The search uses pp collision data collected by the ATLAS detector at the Large Hadron Collider at centre-of-mass energies of √s = 13 TeV and 13.6 TeV, corresponding to integrated luminosities of 140 fb^−1 and 56 fb^−1, respectively. Events containing exactly two same-sign leptons or at least three leptons (electrons or muons) are selected. A transformer-based classifier parameterised as a function of the Z' mass is used to optimise the signal-to-background discrimination. The results are interpreted in a simplified model with a colour-singlet vector boson coupled to top quarks with coupling strength c_t and chirality angle θ. No significant excess is observed above the expected Standard Model background. A Z' boson with mass below 1150 GeV is excluded at 95% confidence level for a benchmark scenario with c_t = 1 and θ= 0, with an expected limit of 1250 GeV.
ER -