Single production of the top partners at high energy colliders

Yue, C. X.; Yang, H.; Ma, Wei

doi:10.1016/j.nuclphysb.2009.03.014

Cited by 38 publications

(6 citation statements)

References 58 publications

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“…so the hierarchy problem induced by the top quark are settled down. 1 At the same time, the new particles such as the gauge bosons and the vector-like top singlet in the LRTH models have rich phenomenology at the LHC (see for examples [17][18][19][23][24][25][26][27][28][29]).…”

Section: The Relevant Couplings In the Lrth Modelsmentioning

confidence: 99%

Muon $$g-2$$ anomaly confronted with the higgs global data in the left-right twin Higgs models

Zeng

2019

Eur. Phys. J. C

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We will examine the muon g − 2 anomaly with the background of the Higgs global fit data in the framework of the Left-Right Twin Higgs (LRTH) Models. The joint constrains of the precision electroweak data, the 125 GeV Higgs data, the leptonic flavor changing decay μ → eγ decays, and the mass requirement of the right-handed neutrino ν R , the vector-like top partner T and the heavy gauge boson W H , m ν R > m T > m W H , are all considered in our calculation. Furthermore, since the neutral scalar φ 0 may be lighter than the 125 GeV Higgs, the direct searches from the h → φ 0 φ 0 channels can impose stringent upper limits on Br(h → φ 0 φ 0 ), which will reduce the allowed region of m φ 0 and f , the vacuum expectation value of the SM right-handed Higgs H R . It is concluded that the muon g-2 anomaly can be explained in the region of 700 GeV ≤ f ≤ 1100 GeV, 13 GeV ≤ m φ 0 ≤ 55 GeV, 100 GeV ≤ m φ ± ≤ 900 GeV, m ν R ≥ 15 TeV, and 200 GeV ≤ M ≤ 800 GeV, after imposing all the constraints mentioned above, where M here means the mass mixing coefficient Mq L q R , allowed by gauge invariance.

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Section: The Relevant Couplings In the Lrth Modelsmentioning

confidence: 99%

Muon $$g-2$$ anomaly confronted with the higgs global data in the left-right twin Higgs models

Zeng

2019

Eur. Phys. J. C

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“…These partner states can lie in various electroweak representations, and generally carry color charge. While T T or B B pair production via the strong interactions would be the dominant discovery mode for lighter states [6,7], single vector-like quark production offers another potentially relevant channel when the new quarks are heavy [8][9][10][11][12][13][14][15][16][17][18]. Correspondingly, current searches at the LHC mainly focus on the QCD-induced production of a pair of vector-like partners [19][20][21][22][23][24][25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Vector-Like top quark production via a chromo-magnetic moment at the LHC

Belyaev,

Chivukula,

Fuks

et al. 2021

Preprint

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Theories which provide a dynamical explanation for the large top-quark mass often include TeV-scale vector-like top-quark and bottom-quark partner states which can be potentially discovered at the LHC. These states are currently probed through model-independent searches for pair-production via gluon fusion, as well as through model-dependent complementary electroweak single production. In this paper we study the potential to extend those searches for the partners of the third-generation Standard Model quarks on the basis of their expected chromomagnetic interactions. We discuss how current searches for "excited" bottom-quarks produced via b-gluon fusion through chromomagnetic interactions are relevant, and provide significant constraints. We then explore the region of the parameter space in which the bottom-quark partner is heavier than the top-quark partner, in which case the top-partner can be primarily produced via the decay of the bottom-partner. Next, we probe the potential of the production of a single top-quark partner in association with an ordinary top-quark by gluon-fusion. Kinematically these two new processes are similar, and they yield the production of a heavy top partner and a lighter Standard Model state, a pattern which allows for the rejection of the associated dominant Standard Model backgrounds.We examine the sensitivity of these modes in the case where the top-partner subsequently decays to a Higgs boson and an ordinary top-quark, and we demonstrate that these new channels have the potential of extending and complementing the conventional strategies at LHC run III and at the high-luminosity phase of the LHC. In this last case, we find that partner masses that range up to about 3 TeV can be reached. This substantially expands the expected mass reach for these new states, including regions of parameter space that are inaccessible by traditional searches.

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“…18 The phenomenology of the LRTH model has been studied by many authors. [20][21][22][23][24][25][26][27][28][29][30][31][32] Besides the SM-like Higgs boson h, the LRTH model predicts the existence of three additional Higgs bosons: one neutral Higgs φ 0 and a pair of charged Higgs bosons φ ± . Double-Higgs boson production in the LRTH model has been investigated in the literature.…”

Section: Introductionmentioning

confidence: 99%

Triple Higgs Boson Production at the Ilc in the Left–right Twin Higgs Model

Qin

Liu

2012

Int. J. Mod. Phys. A

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Besides the SM-like Higgs boson h, the left–right twin Higgs (LRTH) model predicts the existence of three additional Higgs bosons: one neutral Higgs ϕ0and a pair of charged Higgs bosons ϕ±. In this paper, we focus on the study of the triple Higgs production at the ILC, i.e. e+e-→ϕ0ϕ+ϕ-and e+e-→hhϕ0. We present the production cross-sections and the distributions of the various observables, such as, the distributions of the energy and the transverse momenta of neutral and charged Higgs bosons, the differential cross-section of the invariant mass of final Higgs bosons pair, and the production angle distributions of neutral Higgs boson and charged Higgs boson. Our numerical results show that, for the processes e+e-→ϕ0ϕ+ϕ-and e+e-→hhϕ0, the production rates are at the level of 10-1fb with reasonable parameter values while the resonance production cross-section can be significantly enhanced and reach several tens fb. The signatures for signals and corresponding standard model backgrounds are also investigated for the decay mode [Formula: see text].

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Single production of the top partners at high energy colliders

Cited by 38 publications

References 58 publications

Muon $$g-2$$ anomaly confronted with the higgs global data in the left-right twin Higgs models

Muon $$g-2$$ anomaly confronted with the higgs global data in the left-right twin Higgs models

Vector-Like top quark production via a chromo-magnetic moment at the LHC

Triple Higgs Boson Production at the Ilc in the Left–right Twin Higgs Model

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