Abstract
Most searches for top partners, T , are concerned with top partner pair production. However, as these bounds become increasingly stringent, the LHC energy will saturate and single top partner production will become more important. In this paper we study the novel signature of the top partner produced in association with the SM top, \( pp\to T\overline{t}+t\overline{T} \), in a model where the Standard Model (SM) is extended by a vector-like SU(2)L singlet fermion top partner and a real, SM gauge singlet scalar, S. In this model, \( pp\to T\overline{t}+t\overline{T} \) production is possible through loops mediated by the scalar singlet. We find that, with reasonable coupling strengths, the production rate of this channel can dominate top partner pair production at top partner masses of mT ≳ 1.5 TeV. In addition, this model allows for the exotic decay modes T → tg, T → tγ, and T → tS. In much of the parameter space the loop induced decay T → tg dominates and the top partner is quite long lived. New search strategies are necessary to cover these decay modes. We project the the sensitivity of the high luminosity LHC to \( pp\to T\overline{t}+t\overline{T} \) via a realistic collider study. We find with 3 ab−1, the LHC is sensitive to this process for masses mT ≲ 2 TeV. In addition, we provide appendices detailing the renormalization of this model.
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K. Agashe, R. Contino and A. Pomarol, The minimal composite Higgs model, Nucl. Phys. B 719 (2005) 165 [hep-ph/0412089] [INSPIRE].
K. Agashe and R. Contino, The minimal composite Higgs model and electroweak precision tests, Nucl. Phys. B 742 (2006) 59 [hep-ph/0510164] [INSPIRE].
K. Agashe, R. Contino, L. Da Rold and A. Pomarol, A custodial symmetry for \( Zb\overline{b} \), Phys. Lett. B 641 (2006) 62 [hep-ph/0605341] [INSPIRE].
R. Contino, L. Da Rold and A. Pomarol, Light custodians in natural composite Higgs models, Phys. Rev. D 75 (2007) 055014 [hep-ph/0612048] [INSPIRE].
G.F. Giudice, C. Grojean, A. Pomarol and R. Rattazzi, The strongly-interacting light Higgs, JHEP 06 (2007) 045 [hep-ph/0703164] [INSPIRE].
A. Azatov and J. Galloway, Light custodians and Higgs physics in composite models, Phys. Rev. D 85 (2012) 055013 [arXiv:1110.5646] [INSPIRE].
J. Serra, Beyond the minimal top partner decay, JHEP 09 (2015) 176 [arXiv:1506.05110] [INSPIRE].
N. Arkani-Hamed, A.G. Cohen, E. Katz and A.E. Nelson, The littlest Higgs, JHEP 07 (2002) 034 [hep-ph/0206021] [INSPIRE].
N. Arkani-Hamed, et al., Phenomenology of electroweak symmetry breaking from theory space, JHEP 08 (2002) 020 [hep-ph/0202089] [INSPIRE].
I. Low, W. Skiba and D. Tucker-Smith, Little Higgses from an antisymmetric condensate, Phys. Rev. D 66 (2002) 072001 [hep-ph/0207243] [INSPIRE].
S. Chang and J.G. Wacker, Little Higgs and custodial SU(2), Phys. Rev. D 69 (2004) 035002 [hep-ph/0303001] [INSPIRE].
C. Csáki et al., Variations of little Higgs models and their electroweak constraints, Phys. Rev. D 68 (2003) 035009 [hep-ph/0303236] [INSPIRE].
M. Perelstein, M.E. Peskin and A. Pierce, Top quarks and electroweak symmetry breaking in little Higgs models, Phys. Rev. D 69 (2004) 075002 [hep-ph/0310039] [INSPIRE].
M.-C. Chen and S. Dawson, One loop radiative corrections to the rho parameter in the littlest Higgs model, Phys. Rev. D 70 (2004) 015003 [hep-ph/0311032] [INSPIRE].
J. Berger, J. Hubisz and M. Perelstein, A fermionic top partner: naturalness and the LHC, JHEP 07 (2012) 016 [arXiv:1205.0013] [INSPIRE].
S.S.D. Willenbrock and D.A. Dicus, Production of heavy quarks from W gluon fusion, Phys. Rev. D 34 (1986) 155 [INSPIRE].
T. Han, H.E. Logan, B. McElrath and L.-T. Wang, Phenomenology of the little Higgs model, Phys. Rev. D 67 (2003) 095004 [hep-ph/0301040] [INSPIRE].
T. Han, H.E. Logan and L.-T. Wang, Smoking-gun signatures of little Higgs models, JHEP 01 (2006) 099 [hep-ph/0506313] [INSPIRE].
A. De Simone, O. Matsedonskyi, R. Rattazzi and A. Wulzer, A first top partner hunter’s guide, JHEP 04 (2013) 004 [arXiv:1211.5663] [INSPIRE].
M. Backovic et al., Search strategies for TeV scale fermionic top partners with charge 2/3, JHEP 04 (2016) 014 [arXiv:1507.06568] [INSPIRE].
Y.-B. Liu, Search for single production of the heavy vectorlike T quark with T → th and h → γγ at the high-luminosity LHC, Phys. Rev. D 95 (2017) 035013 [arXiv:1612.05851] [INSPIRE].
J.A. Aguilar-Saavedra et al., Handbook of vectorlike quarks: Mixing and single production, Phys. Rev. D 88 (2013) 094010 [arXiv:1306.0572] [INSPIRE].
N. Gutierrez Ortiz et al., Reconstructing singly produced top partners in decays to Wb, Phys. Rev. D 90 (2014) 075009 [arXiv:1403.7490] [INSPIRE].
O. Matsedonskyi, G. Panico and A. Wulzer, On the interpretation of top partners searches, JHEP 12 (2014) 097 [arXiv:1409.0100] [INSPIRE].
N. Liu, L. Wu, B. Yang and M. Zhang, Single top partner production in the Higgs to diphoton channel in the Littlest Higgs Model with T -parity, Phys. Lett. B 753 (2016) 664 [arXiv:1508.07116] [INSPIRE].
M. Backović, T. Flacke, J.H. Kim and S.J. Lee, Discovering heavy new physics in boosted Z channels: Z → l + l − vs \( Z\to \nu \overline{\nu} \), Phys. Rev. D 92 (2015) 011701 [arXiv:1501.07456] [INSPIRE].
Y.-J. Zhang, L. Han and Y.-B. Liu, Single production of the top partner in the T → tZ channel at the LHeC, Phys. Lett. B 768 (2017) 241 [INSPIRE].
Y.-B. Liu and Y.-Q. Li, Search for single production of the vector-like top partner at the 14 TeV LHC, Eur. Phys. J. C 77 (2017) 654 [arXiv:1709.06427] [INSPIRE].
L. Lavoura and J.P. Silva, The oblique corrections from vector-like singlet and doublet quarks, Phys. Rev. D 47 (1993) 2046 [INSPIRE].
N. Maekawa, Electroweak symmetry breaking by vector-like fermions’ condensation with small S and T parameters, Phys. Rev. D 52 (1995) 1684 [INSPIRE].
H.-J. He, N. Polonsky and S.-f. Su, Extra families, Higgs spectrum and oblique corrections, Phys. Rev. D 64 (2001) 053004 [hep-ph/0102144] [INSPIRE].
S. Dawson and E. Furlan, A Higgs conundrum with vector fermions, Phys. Rev. D 86 (2012) 015021 [arXiv:1205.4733] [INSPIRE].
S.A.R. Ellis et al., Survey of vector-like fermion extensions of the Standard Model and their phenomenological implications, JHEP 09 (2014) 130 [arXiv:1404.4398] [INSPIRE].
C.-Y. Chen, S. Dawson and E. Furlan, Vectorlike fermions and Higgs effective field theory revisited, Phys. Rev. D 96 (2017) 015006 [arXiv:1703.06134] [INSPIRE].
V. Barger et al., LHC phenomenology of an extended standard model with a real scalar singlet, Phys. Rev. D 77 (2008) 035005 [arXiv:0706.4311] [INSPIRE].
D. O’Connell, M.J. Ramsey-Musolf and M.B. Wise, Minimal extension of the standard model scalar sector, Phys. Rev. D 75 (2007) 037701 [hep-ph/0611014] [INSPIRE].
G.M. Pruna and T. Robens, Higgs singlet extension parameter space in the light of the LHC discovery, Phys. Rev. D 88 (2013) 115012 [arXiv:1303.1150] [INSPIRE].
C.-Y. Chen, S. Dawson and I.M. Lewis, Exploring resonant di-Higgs boson production in the Higgs singlet model, Phys. Rev. D 91 (2015) 035015 [arXiv:1410.5488] [INSPIRE].
D. Buttazzo, F. Sala and A. Tesi, Singlet-like Higgs bosons at present and future colliders, JHEP 11 (2015) 158 [arXiv:1505.05488] [INSPIRE].
T. Robens and T. Stefaniak, Status of the Higgs singlet extension of the standard model after LHC run 1, Eur. Phys. J. C 75 (2015) 104 [arXiv:1501.02234] [INSPIRE].
S. Dawson and I.M. Lewis, NLO corrections to double Higgs boson production in the Higgs singlet model, Phys. Rev. D 92 (2015) 094023 [arXiv:1508.05397] [INSPIRE].
R. Costa, M. Mühlleitner, M.O.P. Sampaio and R. Santos, Singlet extensions of the standard model at LHC run 2: benchmarks and comparison with the NMSSM, JHEP 06 (2016) 034 [arXiv:1512.05355] [INSPIRE].
S. Kanemura, M. Kikuchi and K. Yagyu, Radiative corrections to the Higgs boson couplings in the model with an additional real singlet scalar field, Nucl. Phys. B 907 (2016) 286 [arXiv:1511.06211] [INSPIRE].
S. Kanemura, M. Kikuchi and K. Yagyu, One-loop corrections to the Higgs self-couplings in the singlet extension, Nucl. Phys. B 917 (2017) 154 [arXiv:1608.01582] [INSPIRE].
T. Robens and T. Stefaniak, LHC benchmark scenarios for the real Higgs singlet extension of the standard model, Eur. Phys. J. C 76 (2016) 268 [arXiv:1601.07880] [INSPIRE].
I.M. Lewis and M. Sullivan, Benchmarks for double Higgs production in the singlet extended standard model at the LHC, Phys. Rev. D 96 (2017) 035037 [arXiv:1701.08774] [INSPIRE].
S. Kanemura, M. Kikuchi, K. Sakurai and K. Yagyu, H-COUP: a program for one-loop corrected Higgs boson couplings in non-minimal Higgs sectors, arXiv:1710.04603 [INSPIRE].
S. Dawson and M. Sullivan, Enhanced di-Higgs boson production in the complex Higgs singlet model, Phys. Rev. D 97 (2018) 015022 [arXiv:1711.06683] [INSPIRE].
P.J. Fox, D. Tucker-Smith and N. Weiner, Higgs friends and counterfeits at hadron colliders, JHEP 06 (2011) 127 [arXiv:1104.5450] [INSPIRE].
J. Ellis et al., On the interpretation of a possible ∼ 750 GeV particle decaying into γγ, JHEP 03 (2016) 176 [arXiv:1512.05327] [INSPIRE].
S.D. McDermott, P. Meade and H. Ramani, Singlet scalar resonances and the diphoton excess, Phys. Lett. B 755 (2016) 353 [arXiv:1512.05326] [INSPIRE].
A. Falkowski, O. Slone and T. Volansky, Phenomenology of a 750 GeV singlet, JHEP 02 (2016) 152 [arXiv:1512.05777] [INSPIRE].
A. Anandakrishnan et al., Odd top partners at the LHC, Phys. Rev. D 93 (2016) 075009 [arXiv:1506.05130] [INSPIRE].
R.S. Gupta et al., Interpreting a 750 GeV diphoton resonance, JHEP 07 (2016) 145 [arXiv:1512.05332] [INSPIRE].
H. Han, S. Wang and S. Zheng, Scalar Explanation of Diphoton Excess at LHC, Nucl. Phys. B 907 (2016) 180 [arXiv:1512.06562] [INSPIRE].
S. Knapen et al., Rays of light from the LHC, Phys. Rev. D 93 (2016) 075020 [arXiv:1512.04928] [INSPIRE].
N. Craig et al., Shedding light on diphoton resonances, Phys. Rev. D 93 (2016) 115023 [arXiv:1512.07733] [INSPIRE].
M.J. Dolan et al., Simplified models for Higgs physics: singlet scalar and vector-like quark phenomenology, JHEP 07 (2016) 039 [arXiv:1601.07208] [INSPIRE].
S. Banerjee et al., Implications of a High-mass diphoton resonance for heavy quark searches, JHEP 11 (2016) 154 [arXiv:1606.09013] [INSPIRE].
K. Nakamura et al., Di-Higgs enhancement by neutral scalar as probe of new colored sector, Eur. Phys. J. C 77 (2017) 273 [arXiv:1701.06137] [INSPIRE].
S.W. Ham, Y.S. Jeong and S.K. Oh, Electroweak phase transition in an extension of the standard model with a real Higgs singlet, J. Phys. G 31 (2005) 857 [hep-ph/0411352] [INSPIRE].
S. Profumo, M.J. Ramsey-Musolf and G. Shaughnessy, Singlet Higgs phenomenology and the electroweak phase transition, JHEP 08 (2007) 010 [arXiv:0705.2425] [INSPIRE].
J.R. Espinosa, T. Konstandin and F. Riva, Strong electroweak phase transitions in the standard model with a singlet, Nucl. Phys. B 854 (2012) 592 [arXiv:1107.5441] [INSPIRE].
J.M. No and M. Ramsey-Musolf, Probing the Higgs Portal at the LHC through resonant di-Higgs production, Phys. Rev. D 89 (2014) 095031 [arXiv:1310.6035] [INSPIRE].
D. Curtin, P. Meade and C.-T. Yu, Testing electroweak baryogenesis with future colliders, JHEP 11 (2014) 127 [arXiv:1409.0005] [INSPIRE].
P. Huang, A. Joglekar, B. Li and C.E.M. Wagner, Probing the electroweak phase transition at the LHC, Phys. Rev. D 93 (2016) 055049 [arXiv:1512.00068] [INSPIRE].
P. Huang, A.J. Long and L.-T. Wang, Probing the electroweak phase transition with Higgs factories and gravitational waves, Phys. Rev. D 94 (2016) 075008 [arXiv:1608.06619] [INSPIRE].
C.-Y. Chen, J. Kozaczuk and I.M. Lewis, Non-resonant collider signatures of a singlet-driven electroweak phase transition, JHEP 08 (2017) 096 [arXiv:1704.05844] [INSPIRE].
S. Fichet et al., The global Higgs as a signal for compositeness at the LHC, JHEP 01 (2017) 012 [arXiv:1608.01995] [INSPIRE].
ATLAS collaboration, Search for pair production of heavy vector-like quarks decaying to high-p T W bosons and b quarks in the lepton-plus-jets final state in pp collisions at \( \sqrt{s}=13 \) TeV with the ATLAS detector, JHEP 10 (2017) 141 [arXiv:1707.03347] [INSPIRE].
ATLAS collaboration, Search for pair production of vector-like top quarks in events with one lepton, jets and missing transverse momentum in \( \sqrt{s}=13 \) TeV pp collisions with the ATLAS detector, JHEP 08 (2017) 052 [arXiv:1705.10751] [INSPIRE].
CMS collaboration, Search for pair production of vector-like quarks in the \( bW\overline{b}W \) channel from proton-proton collisions at \( \sqrt{s}=13 \) TeV, Phys. Lett. B 779 (2018) 82 [arXiv:1710.01539] [INSPIRE].
CMS collaboration, Search for pair production of vector-like T and B quarks in single-lepton final states using boosted jet substructure in proton-proton collisions at \( \sqrt{s}=13 \) TeV, JHEP 11 (2017) 085 [arXiv:1706.03408] [INSPIRE].
A. De Rujula, L. Maiani and R. Petronzio, Search for excited quarks, Phys. Lett. B 140 (1984) 253.
J.H. Kuhn and P.M. Zerwas, Excited quarks and leptons, Phys. Lett. B 147 (1984) 189.
U. Baur, I. Hinchliffe and D. Zeppenfeld, Excited quark production at hadron colliders, Int. J. Mod. Phys. A 2 (1987) 1285 [INSPIRE].
U. Baur, M. Spira and P.M. Zerwas, Excited quark and lepton production at hadron colliders, Phys. Rev. D 42 (1990) 815 [INSPIRE].
T. Han, I. Lewis and Z. Liu, Colored resonant signals at the LHC: largest rate and simplest topology, JHEP 12 (2010) 085 [arXiv:1010.4309] [INSPIRE].
CMS collaboration, Search for pair production of excited top quarks in the lepton + jets final state, Phys. Lett. B 778 (2018) 349 [arXiv:1711.10949] [INSPIRE].
ATLAS, CMS collaboration, G. Aad et al., Combined measurement of the Higgs boson mass in pp collisions at \( \sqrt{s}=7 \) and 8 TeV with the ATLAS and CMS experiments, Phys. Rev. Lett. 114 (2015) 191803 [arXiv:1503.07589] [INSPIRE].
ATLAS collaboration, Measurement of the Higgs boson mass in the H → ZZ ∗ → 4ℓ and H →γγ channels with \( \sqrt{s}=13 \) TeV pp collisions using the ATLAS detector, ATLAS-CONF-2017-046 (2017).
CMS collaboration, Measurements of properties of the Higgs boson decaying into the four-lepton final state in pp collisions at \( \sqrt{s}=13 \) TeV, JHEP 11 (2017) 047 [arXiv:1706.09936] [INSPIRE].
CMS collaboration, Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC, Phys. Lett. B 716 (2012) 30 [arXiv:1207.7235] [INSPIRE].
ATLAS collaboration, Observation of a new particle in the search for the standard model Higgs boson with the ATLAS detector at the LHC, Phys. Lett. B 716 (2012) 1 [arXiv:1207.7214] [INSPIRE].
S. Dawson, E. Furlan and I. Lewis, Unravelling an extended quark sector through multiple Higgs production?, Phys. Rev. D 87 (2013) 014007 [arXiv:1210.6663] [INSPIRE].
Particle Data Group collaboration, C. Patrignani et al., Review of particle physics, Chin. Phys. C 40 (2016) 100001 [INSPIRE].
T. Hahn, Generating Feynman diagrams and amplitudes with FeynArts 3, Comput. Phys. Commun. 140 (2001) 418 [hep-ph/0012260] [INSPIRE].
N.D. Christensen and C. Duhr, FeynRules — Feynman rules made easy, Comput. Phys. Commun. 180 (2009) 1614 [arXiv:0806.4194] [INSPIRE].
A. Alloul et al., FeynRules 2.0 — A complete toolbox for tree-level phenomenology, Comput. Phys. Commun. 185 (2014) 2250 [arXiv:1310.1921] [INSPIRE].
T. Hahn and M. Pérez-Victoria, Automatized one loop calculations in four-dimensions and D-dimensions, Comput. Phys. Commun. 118 (1999) 153 [hep-ph/9807565] [INSPIRE].
NNPDF collaboration, R.D. Ball et al., Parton distributions with QED corrections, Nucl. Phys. B 877 (2013) 290 [arXiv:1308.0598] [INSPIRE].
A. Buckley et al., LHAPDF6: parton density access in the LHC precision era, Eur. Phys. J. C 75 (2015) 132 [arXiv:1412.7420] [INSPIRE].
D. Greco and D. Liu, Hunting composite vector resonances at the LHC: naturalness facing data, JHEP 12 (2014) 126 [arXiv:1410.2883] [INSPIRE].
CMS collaboration, Search for a heavy resonance decaying to a top quark and a vector-like top quark at \( \sqrt{s}=13 \) TeV, JHEP 09 (2017) 053 [arXiv:1703.06352] [INSPIRE].
B.A. Dobrescu, K. Kong and R. Mahbubani, Prospects for top-prime quark discovery at the Tevatron, JHEP 06 (2009) 001 [arXiv:0902.0792] [INSPIRE].
R. Barcelo, A. Carmona, M. Chala, M. Masip and J. Santiago, Single vectorlike quark production at the LHC, Nucl. Phys. B 857 (2012) 172 [arXiv:1110.5914] [INSPIRE].
C. Bini, R. Contino and N. Vignaroli, Heavy-light decay topologies as a new strategy to discover a heavy gluon, JHEP 01 (2012) 157 [arXiv:1110.6058].
A. Freitas, K. Kong and D. Wiegand, Radiative corrections to masses and couplings in universal extra dimensions, JHEP 03 (2018) 093 [arXiv:1711.07526] [INSPIRE].
B.A. Dobrescu and F. Yu, Exotic Signals of Vectorlike Quarks, arXiv:1612.01909 [INSPIRE].
N. Bizot, G. Cacciapaglia and T. Flacke, Common exotic decays of top partners, arXiv:1803.00021 [INSPIRE].
M. Chala, R. Gröber and M. Spannowsky, Searches for vector-like quarks at future colliders and implications for composite Higgs models with dark matter, JHEP 03 (2018) 040 [arXiv:1801.06537] [INSPIRE].
M. Buchkremer and A. Schmidt, Long-lived heavy quarks: a review, Adv. High Energy Phys. 2013 (2013) 690254 [arXiv:1210.6369] [INSPIRE].
I.I.Y. Bigi et al., Production and decay properties of ultraheavy quarks, Phys. Lett. B 181 (1986) 157 [INSPIRE].
Y. Kats and M.J. Strassler, Probing colored particles with photons, leptons and jets, JHEP 11 (2012) 097 [Erratum ibid. 1607 (2016) 009] [arXiv:1204.1119] [INSPIRE].
V.D. Barger et al., Superheavy quarkonium production and decays: a new Higgs signal, Phys. Rev. D 35 (1987) 3366 [Erratum ibid. D 38 (1988) 1632] [INSPIRE].
J.H. Kuhn and E. Mirkes, Exotic bound state production at hadron colliders, Phys. Lett. B 311 (1993) 301 [hep-ph/9305231] [INSPIRE].
M.J. Strassler and K.M. Zurek, Echoes of a hidden valley at hadron colliders, Phys. Lett. B 651 (2007) 374 [hep-ph/0604261] [INSPIRE].
P.W. Graham et al., Displaced supersymmetry, JHEP 07 (2012) 149 [arXiv:1204.6038] [INSPIRE].
Z. Liu and B. Tweedie, The fate of long-lived superparticles with hadronic decays after LHC run 1, JHEP 06 (2015) 042 [arXiv:1503.05923] [INSPIRE].
M. Drees and X. Tata, Signals for heavy exotics at hadron colliders and supercolliders, Phys. Lett. B 252 (1990) 695 [INSPIRE].
A. Arvanitaki et al., Stopping gluinos, Phys. Rev. D 76 (2007) 055007 [hep-ph/0506242] [INSPIRE].
P.W. Graham et al., New measurements with stopped particles at the LHC, Phys. Rev. D 86 (2012) 034020 [arXiv:1111.4176] [INSPIRE].
M. Fairbairn et al., Stable massive particles at colliders, Phys. Rept. 438 (2007) 1 [hep-ph/0611040] [INSPIRE].
CMS collaboration, Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at \( \sqrt{s}=8 \) TeV, Phys. Rev. D 91 (2015) 012007 [arXiv:1411.6530] [INSPIRE].
ATLAS collaboration, Search for massive, long-lived particles using multitrack displaced vertices or displaced lepton pairs in pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, Phys. Rev. D 92 (2015) 072004 [arXiv:1504.05162] [INSPIRE].
CMS collaboration, Search for R-parity violating supersymmetry with displaced vertices in proton-proton collisions at \( \sqrt{s}=8 \) TeV, Phys. Rev. D 95 (2017) 012009 [arXiv:1610.05133] [INSPIRE].
CMS collaboration, Search for new long-lived particles at \( \sqrt{s}=13 \) TeV, Phys. Lett. B 780 (2018) 432 [arXiv:1711.09120] [INSPIRE].
ATLAS collaboration, Search for long-lived, massive particles in events with displaced vertices and missing transverse momentum in \( \sqrt{s}=13 \) TeV pp collisions with the ATLAS detector, Phys. Rev. D 97 (2018) 052012 [arXiv:1710.04901] [INSPIRE].
ATLAS collaboration, Search for long-lived, massive particles in events with displaced vertices and missing transverse momentum in 13 TeV pp collisions with the ATLAS detector, ATLAS-CONF-2017-026 (2017).
ATLAS collaboration, Search for pair-produced long-lived neutral particles decaying in the ATLAS hadronic calorimeter in pp collisions at \( \sqrt{s}=8 \) TeV, Phys. Lett. B 743 (2015) 15 [arXiv:1501.04020] [INSPIRE].
ATLAS collaboration, Search for long-lived neutral particles decaying in the hadronic calorimeter of ATLAS at \( \sqrt{s}=13 \) TeV in 3.2 fb −1 of data, ATLAS-CONF-2016-103 (2016).
CMS collaboration, Searches for long-lived charged particles in pp collisions at \( \sqrt{s}=7 \) and 8 TeV, JHEP 07 (2013) 122 [arXiv:1305.0491] [INSPIRE].
CMS collaboration, Search for long-lived charged particles in proton-proton collisions at \( \sqrt{s}=13 \) TeV, Phys. Rev. D 94 (2016) 112004 [arXiv:1609.08382] [INSPIRE].
ATLAS collaboration, Searches for heavy long-lived charged particles with the ATLAS detector in proton-proton collisions at \( \sqrt{s}=8 \) TeV, JHEP 01 (2015) 068 [arXiv:1411.6795] [INSPIRE].
ATLAS collaboration, Search for metastable heavy charged particles with large ionisation energy loss in pp collisions at \( \sqrt{s}=8 \) TeV using the ATLAS experiment, Eur. Phys. J. C 75 (2015) 407 [arXiv:1506.05332] [INSPIRE].
ATLAS collaboration, Search for heavy long-lived charged R-hadrons with the ATLAS detector in 3.2 fb −1 of proton-proton collision data at \( \sqrt{s}=13 \) TeV, Phys. Lett. B 760 (2016) 647 [arXiv:1606.05129] [INSPIRE].
CMS collaboration, Search for decays of stopped exotic long-lived particles produced in proton-proton collisions at \( \sqrt{s}=13 \) TeV, arXiv:1801.00359 [INSPIRE].
CMS collaboration, Search for decays of stopped long-lived particles produced in proton-proton collisions at \( \sqrt{s}=8 \) TeV, Eur. Phys. J. C 75 (2015) 151 [arXiv:1501.05603] [INSPIRE].
ATLAS collaboration, Search for long-lived stopped R-hadrons decaying out-of-time with pp collisions using the ATLAS detector, Phys. Rev. D 88 (2013) 112003 [arXiv:1310.6584] [INSPIRE].
C. Anastasiou et al., CP-even scalar boson production via gluon fusion at the LHC, JHEP 09 (2016) 037 [arXiv:1605.05761] [INSPIRE].
CMS collaboration, Search for new resonances in the diphoton final state in the mass range between 70 and 110 GeV in pp collisions at \( \sqrt{s}=8 \) and 13 TeV, CMS-PAS-HIG-17-013 (2017).
ATLAS collaboration, Search for new phenomena in high-mass diphoton final states using 37 fb −1 of proton-proton collisions collected at \( \sqrt{s}=13 \) TeV with the ATLAS detector, Phys. Lett. B 775 (2017) 105 [arXiv:1707.04147] [INSPIRE].
M. Czakon and A. Mitov, Top++: a program for the calculation of the top-pair cross-section at hadron colliders, Comput. Phys. Commun. 185 (2014) 2930 [arXiv:1112.5675] [INSPIRE].
M. Czakon, P. Fiedler and A. Mitov, Total top-quark pair-production cross section at hadron colliders through O(α 4 S ), Phys. Rev. Lett. 110 (2013) 252004 [arXiv:1303.6254] [INSPIRE].
M. Czakon and A. Mitov, NNLO corrections to top pair production at hadron colliders: the quark-gluon reaction, JHEP 01 (2013) 080 [arXiv:1210.6832] [INSPIRE].
M. Czakon and A. Mitov, NNLO corrections to top-pair production at hadron colliders: the all-fermionic scattering channels, JHEP 12 (2012) 054 [arXiv:1207.0236] [INSPIRE].
M. Cacciari et al., Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation, Phys. Lett. B 710 (2012) 612 [arXiv:1111.5869] [INSPIRE].
ATLAS collaboration, Search for single production of vector-like quarks decaying into W b in pp collisions at \( \sqrt{s} \) = 13 TeV with the ATLAS detector, ATLAS-CONF-2016-072 (2016).
CMS collaboration, Search for a vectorlike top partner produced through electroweak interaction and decaying to a top quark and a Higgs boson using boosted topologies in the all-hadronic final state, CMS-PAS-B2G-16-005 (2016).
CMS collaboration, Search for single production of a vector-like T quark decaying to a Z boson and a top quark in proton-proton collisions at \( \sqrt{s}=13 \) TeV, Phys. Lett. B 781 (2018) 574 [arXiv:1708.01062] [INSPIRE].
C.-Y. Chen, S. Dawson and I.M. Lewis, Top partners and Higgs boson production, Phys. Rev. D 90 (2014) 035016 [arXiv:1406.3349] [INSPIRE].
CMS collaboration, Searches for dijet resonances in pp collisions at \( \sqrt{s}=13 \) TeV using data collected in 2016, CMS-PAS-EXO-16-056 (2016).
CMS collaboration, Search for Zγ resonances using leptonic and hadronic final states in proton-proton collisions at \( \sqrt{s}=13 \) TeV, arXiv:1712.03143 [INSPIRE].
ATLAS collaboration, Search for heavy ZZ resonances in the ℓ + ℓ − ℓ + ℓ − and \( {\ell}^{+}{\ell}^{-}\nu \overline{\nu} \) final states using proton-proton collisions at \( \sqrt{s}=13 \) TeV with the ATLAS detector, Eur. Phys. J. C 78 (2018) 293 [arXiv:1712.06386] [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].
T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 physics and manual, JHEP 05 (2006) 026 [hep-ph/0603175] [INSPIRE].
M. Cacciari, G.P. Salam and G. Soyez, FastJet user manual, Eur. Phys. J. C 72 (2012) 1896 [arXiv:1111.6097] [INSPIRE].
M. Cacciari, G.P. Salam and G. Soyez, The anti-k t jet clustering algorithm, JHEP 04 (2008) 063 [arXiv:0802.1189] [INSPIRE].
ATLAS collaboration, Performance assumptions for an upgraded ATLAS detector at a High-Luminosity LHC, ATL-PHYS-PUB-2013-004 (2013).
M.L. Mangano, M. Moretti, F. Piccinini and M. Treccani, Matching matrix elements and shower evolution for top-quark production in hadronic collisions, JHEP 01 (2007) 013 [hep-ph/0611129] [INSPIRE].
D. Chway et al., Gluons to diphotons via new particles with half the signal’s invariant mass, Phys. Rev. Lett. 117 (2016) 061801 [arXiv:1512.08221] [INSPIRE].
S. Dawson, A. Ismail and I. Low, What’s in the loop? The anatomy of double Higgs production, Phys. Rev. D 91 (2015) 115008 [arXiv:1504.05596] [INSPIRE].
K. Rehermann and B. Tweedie, Efficient identification of boosted semileptonic top quarks at the LHC, JHEP 03 (2011) 059 [arXiv:1007.2221] [INSPIRE].
M. Backović and J. Juknevich, TemplateTagger v1.0.0: a template matching tool for jet substructure, Comput. Phys. Commun. 185 (2014) 1322 [arXiv:1212.2978] [INSPIRE].
L.G. Almeida et al., Template overlap method for massive jets, Phys. Rev. D 82 (2010) 054034 [arXiv:1006.2035] [INSPIRE].
M. Backovic et al., Measuring boosted tops in semi-leptonic tt events for the standard model and beyond, JHEP 04 (2014) 176 [arXiv:1311.2962] [INSPIRE].
G. Kasieczka, T. Plehn, M. Russell and T. Schell, Deep-learning top taggers or the end of QCD?, JHEP 05 (2017) 006 [arXiv:1701.08784] [INSPIRE].
M. Backović et al., Boosted event topologies from tev scale light quark composite partners, JHEP 04 (2015) 082 [arXiv:1410.8131] [INSPIRE].
ATLAS collaboration, Expected performance for an upgraded ATLAS detector at High-Luminosity LHC, ATL-PHYS-PUB-2016-026 (2016).
V. Barger, T. Han and D.G.E. Walker, Top quark pairs at high invariant mass: a model-independent discriminator of new physics at the LHC, Phys. Rev. Lett. 100 (2008) 031801 [hep-ph/0612016] [INSPIRE].
S. Gopalakrishna et al., Chiral couplings of W ′ and top quark polarization at the LHC, Phys. Rev. D 82 (2010) 115020 [arXiv:1008.3508] [INSPIRE].
G. Cowan, K. Cranmer, E. Gross and O. Vitells, Asymptotic formulae for likelihood-based tests of new physics, Eur. Phys. J. C 71 (2011) 1554 [Erratum ibid. C 73 (2013) 2501] [arXiv:1007.1727] [INSPIRE].
D. Espriu, J. Manzano and P. Talavera, Flavor mixing, gauge invariance and wave function renormalization, Phys. Rev. D 66 (2002) 076002 [hep-ph/0204085] [INSPIRE].
B.A. Kniehl and A. Sirlin, Novel formulations of CKM matrix renormalization, AIP Conf. Proc. 1182 (2009) 327 [arXiv:0906.2670] [INSPIRE].
B.A. Kniehl and A. Sirlin, A novel formulation of Cabibbo-Kobayashi-Maskawa matrix renormalization, Phys. Lett. B 673 (2009) 208 [arXiv:0901.0114] [INSPIRE].
B.A. Kniehl and A. Sirlin, Simple on-shell renormalization framework for the Cabibbo-Kobayashi-Maskawa matrix, Phys. Rev. D 74 (2006) 116003 [hep-th/0612033] [INSPIRE].
A. Denner, Techniques for calculation of electroweak radiative corrections at the one loop level and results for W physics at LEP-200, Fortsch. Phys. 41 (1993) 307 [arXiv:0709.1075] [INSPIRE].
N.G. Deshpande and G. Eilam, Flavor changing electromagnetic transitions, Phys. Rev. D 26 (1982) 2463 [INSPIRE].
A. Denner and T. Sack, Renormalization of the quark mixing matrix, Nucl. Phys. B 347 (1990) 203 [INSPIRE].
F. Jegerlehner, Renormalizing the standard model, Conf. Proc. C 900603 (1990) 476 [INSPIRE].
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Kim, J.H., Lewis, I.M. Loop induced single top partner production and decay at the LHC. J. High Energ. Phys. 2018, 95 (2018). https://doi.org/10.1007/JHEP05(2018)095
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DOI: https://doi.org/10.1007/JHEP05(2018)095