Abstract
We study four top quark production at hadron colliders in the Standard Model Effective Field Theory (SMEFT). We perform an analysis at the tree-level, including all possible QCD- and EW-coupling orders and relevant dimension-six operators. We find several cases where formally subleading terms give rise to significant contributions, potentially providing sensitivity to a broad class of operators. Inclusive and differential predictions are presented for the LHC and a future pp circular collider operating at 100 TeV. We estimate the sensitivity of different operators and perform a simplified chi-square fit to set limits on SMEFT Wilson coefficients. In so doing, we assess the importance of including subleading terms and differential information in constraining new physics contributions. Finally, we compute the SMEFT predictions for the double insertion of dimension-six operators and scrutinise the possible enhancements to the sensitivity induced by a specific class of higher order terms in the EFT series.
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References
F. Blekman, F. Déliot, V. Dutta and E. Usai, Four-top quark physics at the LHC, arXiv:2208.04085 [INSPIRE].
R. Frederix, D. Pagani and M. Zaro, Large NLO corrections in \( t\overline{t}W \)± and \( t\overline{t}t\overline{t} \) hadroproduction from supposedly subleading EW contributions, JHEP 02 (2018) 031 [arXiv:1711.02116] [INSPIRE].
B. Lillie, J. Shu and T.M.P. Tait, Top compositeness at the Tevatron and LHC, JHEP 04 (2008) 087 [arXiv:0712.3057] [INSPIRE].
A. Pomarol and J. Serra, Top quark compositeness: feasibility and implications, Phys. Rev. D 78 (2008) 074026 [arXiv:0806.3247] [INSPIRE].
K. Kumar, T.M.P. Tait and R. Vega-Morales, Manifestations of top compositeness at colliders, JHEP 05 (2009) 022 [arXiv:0901.3808] [INSPIRE].
A. Deandrea and N. Deutschmann, Multi-tops at the LHC, JHEP 08 (2014) 134 [arXiv:1405.6119] [INSPIRE].
J. Berger, M. Perelstein, M. Saelim and A. Spray, Boosted tops from gluino decays, arXiv:1111.6594 [INSPIRE].
J.A. Aguilar-Saavedra and J. Santiago, Four tops and the \( t\overline{t} \) forward-backward asymmetry, Phys. Rev. D 85 (2012) 034021 [arXiv:1112.3778] [INSPIRE].
L. Beck, F. Blekman, D. Dobur, B. Fuks, J. Keaveney and K. Mawatari, Probing top-philic sgluons with LHC run I data, Phys. Lett. B 746 (2015) 48 [arXiv:1501.07580] [INSPIRE].
P.S. Bhupal Dev and A. Pilaftsis, Maximally symmetric two Higgs doublet model with natural standard model alignment, JHEP 12 (2014) 024 [Erratum ibid. 11 (2015) 147] [arXiv:1408.3405] [INSPIRE].
B.S. Acharya, P. Grajek, G.L. Kane, E. Kuflik, K. Suruliz and L.-T. Wang, Identifying multi-top events from gluino decay at the LHC, arXiv:0901.3367 [INSPIRE].
T. Gregoire, E. Katz and V. Sanz, Four top quarks in extensions of the standard model, Phys. Rev. D 85 (2012) 055024 [arXiv:1101.1294] [INSPIRE].
C. Degrande, J.-M. Gerard, C. Grojean, F. Maltoni and G. Servant, Non-resonant new physics in top pair production at hadron colliders, JHEP 03 (2011) 125 [arXiv:1010.6304] [INSPIRE].
Q.-H. Cao, J.-N. Fu, Y. Liu, X.-H. Wang and R. Zhang, Probing top-philic new physics via four-top-quark production, Chin. Phys. C 45 (2021) 093107 [arXiv:2105.03372] [INSPIRE].
L. Darmé, B. Fuks and F. Maltoni, Top-philic heavy resonances in four-top final states and their EFT interpretation, JHEP 09 (2021) 143 [arXiv:2104.09512] [INSPIRE].
G. Banelli, E. Salvioni, J. Serra, T. Theil and A. Weiler, The present and future of four top operators, JHEP 02 (2021) 043 [arXiv:2010.05915] [INSPIRE].
C. Englert, G.F. Giudice, A. Greljo and M. Mccullough, The \( \hat{H} \)-parameter: an oblique Higgs view, JHEP 09 (2019) 041 [arXiv:1903.07725] [INSPIRE].
G. Bevilacqua and M. Worek, Constraining BSM physics at the LHC: four top final states with NLO accuracy in perturbative QCD, JHEP 07 (2012) 111 [arXiv:1206.3064] [INSPIRE].
J. Alwall et al., The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations, JHEP 07 (2014) 079 [arXiv:1405.0301] [INSPIRE].
F. Maltoni, D. Pagani and I. Tsinikos, Associated production of a top-quark pair with vector bosons at NLO in QCD: impact on \( t\overline{t}H \) searches at the LHC, JHEP 02 (2016) 113 [arXiv:1507.05640] [INSPIRE].
T. Ježo and M. Kraus, Hadroproduction of four top quarks in the powheg box, Phys. Rev. D 105 (2022) 114024 [arXiv:2110.15159] [INSPIRE].
C. Degrande, G. Durieux, F. Maltoni, K. Mimasu, E. Vryonidou and C. Zhang, Automated one-loop computations in the standard model effective field theory, Phys. Rev. D 103 (2021) 096024 [arXiv:2008.11743] [INSPIRE].
Q.-H. Cao, S.-L. Chen and Y. Liu, Probing Higgs width and top quark Yukawa coupling from \( t\overline{t}H \) and \( t\overline{t}t\overline{t} \) productions, Phys. Rev. D 95 (2017) 053004 [arXiv:1602.01934] [INSPIRE].
S. Weinberg, Phenomenological Lagrangians, Physica A 96 (1979) 327 [INSPIRE].
W. Buchmüller and D. Wyler, Effective Lagrangian analysis of new interactions and flavor conservation, Nucl. Phys. B 268 (1986) 621 [INSPIRE].
C.N. Leung, S.T. Love and S. Rao, Low-energy manifestations of a new interaction scale: operator analysis, Z. Phys. C 31 (1986) 433 [INSPIRE].
I. Brivio et al., O new physics, where art thou? A global search in the top sector, JHEP 02 (2020) 131 [arXiv:1910.03606] [INSPIRE].
N.P. Hartland et al., A Monte Carlo global analysis of the standard model effective field theory: the top quark sector, JHEP 04 (2019) 100 [arXiv:1901.05965] [INSPIRE].
SMEFiT collaboration, Combined SMEFT interpretation of Higgs, diboson, and top quark data from the LHC, JHEP 11 (2021) 089 [arXiv:2105.00006] [INSPIRE].
J. Ellis, M. Madigan, K. Mimasu, V. Sanz and T. You, Top, Higgs, diboson and electroweak fit to the standard model effective field theory, JHEP 04 (2021) 279 [arXiv:2012.02779] [INSPIRE].
A. Buckley et al., Constraining top quark effective theory in the LHC run II era, JHEP 04 (2016) 015 [arXiv:1512.03360] [INSPIRE].
V. Miralles, M.M. López, M.M. Llácer, A. Peñuelas, M. Perelló and M. Vos, The top quark electro-weak couplings after LHC run 2, JHEP 02 (2022) 032 [arXiv:2107.13917] [INSPIRE].
L. Alasfar, J. de Blas and R. Gröber, Higgs probes of top quark contact interactions and their interplay with the Higgs self-coupling, JHEP 05 (2022) 111 [arXiv:2202.02333] [INSPIRE].
S. Dawson and P.P. Giardino, Flavorful electroweak precision observables in the standard model effective field theory, Phys. Rev. D 105 (2022) 073006 [arXiv:2201.09887] [INSPIRE].
C. Zhang, Constraining qqtt operators from four-top production: a case for enhanced EFT sensitivity, Chin. Phys. C 42 (2018) 023104 [arXiv:1708.05928] [INSPIRE].
D. Barducci et al., Interpreting top-quark LHC measurements in the standard-model effective field theory, arXiv:1802.07237 [INSPIRE].
B. Grzadkowski, M. Iskrzynski, M. Misiak and J. Rosiek, Dimension-six terms in the standard model lagrangian, JHEP 10 (2010) 085 [arXiv:1008.4884] [INSPIRE].
F. Krauss, S. Kuttimalai and T. Plehn, LHC multijet events as a probe for anomalous dimension-six gluon interactions, Phys. Rev. D 95 (2017) 035024 [arXiv:1611.00767] [INSPIRE].
V. Hirschi, F. Maltoni, I. Tsinikos and E. Vryonidou, Constraining anomalous gluon self-interactions at the LHC: a reappraisal, JHEP 07 (2018) 093 [arXiv:1806.04696] [INSPIRE].
C.W. Murphy, Dimension-8 operators in the standard model effective field theory, JHEP 10 (2020) 174 [arXiv:2005.00059] [INSPIRE].
H.-L. Li, Z. Ren, J. Shu, M.-L. Xiao, J.-H. Yu and Y.-H. Zheng, Complete set of dimension-eight operators in the standard model effective field theory, Phys. Rev. D 104 (2021) 015026 [arXiv:2005.00008] [INSPIRE].
R. Frederix, S. Frixione, V. Hirschi, D. Pagani, H.S. Shao and M. Zaro, The automation of next-to-leading order electroweak calculations, JHEP 07 (2018) 185 [Erratum ibid. 11 (2021) 085] [arXiv:1804.10017] [INSPIRE].
NNPDF collaboration, Parton distributions from high-precision collider data, Eur. Phys. J. C 77 (2017) 663 [arXiv:1706.00428] [INSPIRE].
ATLAS collaboration, Measurement of the \( t\overline{t}t\overline{t} \) production cross section in pp collisions at \( \sqrt{s} \) = 13 TeV with the ATLAS detector, Tech. Rep. ATLAS-CONF-2021-013, CERN, Geneva, Switzerland (2021).
ATLAS collaboration, Search for four-top-quark production in the single-lepton and opposite-sign dilepton final states in pp collisions at \( \sqrt{s} \) = 13 TeV with the ATLAS detector, Phys. Rev. D 99 (2019) 052009 [arXiv:1811.02305] [INSPIRE].
P. Azzi et al., Report from working group 1: standard model physics at the HL-LHC and HE-LHC, CERN Yellow Rep. Monogr. 7 (2019) 1 [arXiv:1902.04070] [INSPIRE].
ATLAS collaboration, Evidence for \( t\overline{t}t\overline{t} \) production in the multilepton final state in proton-proton collisions at \( \sqrt{s} \) = 13 TeV with the ATLAS detector, Eur. Phys. J. C 80 (2020) 1085 [arXiv:2007.14858] [INSPIRE].
CMS collaboration, Search for production of four top quarks in final states with same-sign or multiple leptons in proton-proton collisions at \( \sqrt{s} \) = 13 TeV, Eur. Phys. J. C 80 (2020) 75 [arXiv:1908.06463] [INSPIRE].
CMS collaboration, Search for physics beyond the standard model in events with two leptons of same sign, missing transverse momentum, and jets in proton-proton collisions at \( \sqrt{s} \) = 13 TeV, Eur. Phys. J. C 77 (2017) 578 [arXiv:1704.07323] [INSPIRE].
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Aoude, R., El Faham, H., Maltoni, F. et al. Complete SMEFT predictions for four top quark production at hadron colliders. J. High Energ. Phys. 2022, 163 (2022). https://doi.org/10.1007/JHEP10(2022)163
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DOI: https://doi.org/10.1007/JHEP10(2022)163