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Probing top-quark couplings indirectly at Higgs factoriesCZ is supported by IHEP (Y7515540U1); EV is supported by a Marie Skłodowska-Curie Individual Fellowship of the European Commission’s Horizon 2020 Programme (704187)
/ Durieux, Gauthier ; Gu, Jiayin ; Vryonidou, Eleni ; Zhang, Cen
We perform a global effective-field-theory analysis to assess the combined precision of Higgs couplings, triple gauge-boson couplings, and top-quark couplings, at future circular e+e− colliders, with a focus on runs below the production threshold. [...]
Published in Chinese Phys. C 42 (2018) 123107
10.1088/1674-1137/42/12/123107
arXiv:1809.03520
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Learning to pinpoint effective operators at the LHC: a study of the t t ¯ b b ¯ $$ \mathrm{t}\overline{\mathrm{t}}\mathrm{b}\overline{\mathrm{b}} $$ signature
/ D’Hondt, Jorgen ; Mariotti, Alberto ; Mimasu, Ken ; Moortgat, Seth ; et al
In the context of the Standard Model effective field theory (SMEFT), we study the LHC sensitivity to four fermion operators involving heavy quarks by employing cross section measurements in the t t ¯ b b ¯ $$ t\overline{t}b\overline{b} $$ final state. [...]
Published in JHEP 1811 (2018) 131
10.1007/JHEP11(2018)131
arXiv:1807.02130
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Global and optimal probes for the top-quark effective field theory at future lepton colliders
/ Durieux, Gauthier ; Perelló, Martín ; Vos, Marcel ; Zhang, Cen
We study the sensitivity to physics beyond the standard model of precise top-quark pair production measurements at future lepton colliders. [...]
Published in JHEP 1810 (2018) 168
10.1007/JHEP10(2018)168
arXiv:1807.02121
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Single-top associated production with a Z or H boson at the LHC: the SMEFT interpretation
/ Degrande, Celine ; Maltoni, Fabio ; Mimasu, Ken ; Vryonidou, Eleni ; et al
At the LHC, top quarks can be produced singly with a sizeable rate via electroweak interactions. [...]
Published in JHEP 1810 (2018) 005
10.1007/JHEP10(2018)005
arXiv:1804.07773
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Dimension-six electroweak top-loop effects in Higgs production and decay
/ Vryonidou, Eleni ; Zhang, Cen
We study the next-to-leading order electroweak corrections to Higgs processes from dimension-six top-quark operators in the Standard Model Effective Field Theory approach. [...]
Published in JHEP 1808 (2018) 036
10.1007/JHEP08(2018)036
arXiv:1804.09766
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Constraining qqtt operators from four-top production: a case for enhanced EFT sensitivitySupported by the 100-talent project of Chinese Academy of Sciences
/ Zhang, Cen
Recently, experimental collaborations have reported upper limits on the signal strength of four-top production at the LHC. [...]
Published in Chinese Phys. C 42 (2018) 023104
10.1088/1674-1137/42/2/023104
arXiv:1708.05928
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Scalar production and decay to top quarks including interference effects at NLO in QCD in an EFT approach
/ Franzosi, Diogo ; Vryonidou, Eleni ; Zhang, Cen
Scalar and pseudo-scalar resonances decaying to top quarks are common predictions in several scenarios beyond the standard model (SM) and are extensively searched for by LHC experiments. [...]
Published in JHEP 1710 (2017) 096
10.1007/JHEP10(2017)096
arXiv:1707.06760
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Asymmetric dark matter in extended exo-Higgs scenarios
/ Davoudiasl, Hooman ; Giardino, Pier Paolo ; Zhang, Cen
The exo-Higgs model can accommodate a successful baryogenesis mechanism that closely mirrors electroweak baryogenesis in the Standard Model, but avoids its shortcomings. [...]
Published in Physics letters B (2017)
10.1016/j.physletb.2017.07.009
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WITHDRAWN: Muon g − 2 from asymmetric dark matter in the exo-Higgs scenario
/ Davoudiasl, Hooman ; Giardino, Pier Paolo ; Zhang, Cen
This article has been withdrawn at the request of the author(s) and/or editor. [...]
Published in Physics letters B (2017)
10.1016/j.physletb.2017.03.008
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Higgs production in association with a top-antitop pair in the Standard Model Effective Field Theory at NLO in QCD
/ Maltoni, Fabio ; Vryonidou, Eleni ; Zhang, Cen
We present the results of the computation of the next-to-leading order QCD corrections to the production cross section of a Higgs boson in association with a top-antitop pair at the LHC, including the three relevant dimension-six operators ( O tφ , O φG , O tG ) of the standard model effective field theory. [...]
Published in JHEP 1610 (2016) 123
10.1007/JHEP10(2016)123
arXiv:1607.05330
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