Production and decays of a light ϕ 0 in the LRTH model under the LHC Higgs data

Liu, Yao-Bei; Xiao, Z. J.

doi:10.1007/jhep02(2014)128

Cited by 7 publications

(3 citation statements)

References 88 publications

(126 reference statements)

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“…In Ref. [48], we studied the production and decays of a light φ 0 . The relevant couplings can be written as [9]:…”

Section: Associate Production With φmentioning

confidence: 99%

“…The dominant decay mode of φ 0 is φ 0 → b b, with a branching ratio Br(φ 0 → b b) ≃ 0.8 fb for m φ 0 = 120 GeV [48]. For a large value of M, the dominate decay mode T → φ + b → t bb can also make the process e + e − → tT φ 0 + T tφ 0 also give rise to the t tb bb b final state, which is similar to the case of (tT h + T th) productions.…”

Section: Associate Production With φmentioning

confidence: 99%

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The production and decay of the top partner T in the left–right twin Higgs model at the ILC and CLIC

Liu

Xiao

2015

Nuclear Physics B

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The left-right twin Higgs model (LRTHM) predicts the existence of the top partner T . In this work, we make a systematic investigation for the single and pair production of this top partner T through the processes: e + e − → tT + Tt and T T , the neutral scalar (the SM-like Higgs boson h or neutral pseudoscalar boson φ 0 ) associate productions e + e − → tT h + Tth, T T h, tT φ 0 + Ttφ 0 and T T φ 0 . From the numerical evaluations for the production cross sections and relevant phenomenological analysis we find that (a) the production rates of these processes, in the reasonable parameter space, can reach the level of several or tens of femtobarns; (b) for some cases, the peak value of the resonance production cross section can be enhanced significantly and reaches to the level of pb; (c) the subsequent decay of T → φ + b → tbb may generate typical phenomenological features rather different from the signals from other new physics models beyond the standard model (SM); and (d) since the relevant SM background is generally not large, some signals of the top partner T predicted by the LRTHM may be detectable in the future ILC and CLIC experiments.

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“…In Ref. [48], we studied the production and decays of a light φ 0 . The relevant couplings can be written as [9]:…”

Section: Associate Production With φmentioning

confidence: 99%

Section: Associate Production With φmentioning

confidence: 99%

The production and decay of the top partner T in the left–right twin Higgs model at the ILC and CLIC

Liu

Xiao

2015

Nuclear Physics B

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“…The LRTHM predicted the existence of the new heavy gauge bosons, top partner, neutral and charged scalars at or below the TeV scale, which can produce rich phenomenology at the high energy colliders [17][18][19][20][21][22][23]. In the LRTHM, the couplings of the electroweak gauge bosons to top quarks and the couplings of the SM-like Higgs boson to ordinary particles are corrected at the order  v f ( ) 2 2 .…”

Section: Introductionmentioning

confidence: 99%

Single Higgs boson production at the ILC in the left-right twin Higgs model

Liu

Xiao

2015

J. Phys. G: Nucl. Part. Phys.

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In this work, we analyze three dominant single SM-like Higgs boson production processes in the left-right twin Higgs model (LRTHM): the Higgs-strahlung (HS) process e + e − → Zh, the vector boson fusion (VBF) process e + e − → ννh and the associate production with top pair process e + e − → tth for three possible energy stages of the International Linear Collider (ILC), and compared our results with the expected experimental accuracies for various accessible Higgs decay channels. The following observations have been obtained: (i) In the reasonable parameter space, the LRTHM can generate moderate contributions to theses processes with polarized beams; (ii) Among various Higgs boson decay channels, the bb signal strength is most sensitive to the LRTHM due to the high expected precision. For the tth production process, the absolute value of µ bb may deviate from the SM prediction by over 8.7% and thus may be detectable at the future ILC with √ s = 1 TeV; (iii) The future ILC experiments may give strong limit on the scale parameter f : for the case of ILC-250 GeV, for example, the lower limit for parameter f of the LRTHM is f > 1150 GeV at the 2σ level.

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Can a pseudo-Nambu-Goldstone Higgs lead to symmetry non-restoration?

Kılıç

Swaminathan

2016

J. High Energ. Phys.

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The calculation of finite temperature contributions to the scalar potential in a quantum field theory is similar to the calculation of loop corrections at zero temperature. In natural extensions of the Standard Model where loop corrections to the Higgs potential cancel between Standard Model degrees of freedom and their symmetry partners, it is interesting to contemplate whether finite temperature corrections also cancel, raising the question of whether a broken phase of electroweak symmetry may persist at high temperature. It is well known that this does not happen in supersymmetric theories because the thermal contributions of bosons and fermions do not cancel each other. However, for theories with same spin partners, the answer is less obvious. Using the Twin Higgs model as a benchmark, we show that although thermal corrections do cancel at the level of quadratic divergences, subleading corrections still drive the system to a restored phase. We further argue that our conclusions generalize to other well-known extensions of the Standard Model where the Higgs is rendered natural by being the pseudo-Nambu-Goldstone mode of an approximate global symmetry.

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Production and decays of a light ϕ 0 in the LRTH model under the LHC Higgs data

Cited by 7 publications

References 88 publications

The production and decay of the top partner T in the left–right twin Higgs model at the ILC and CLIC

The production and decay of the top partner T in the left–right twin Higgs model at the ILC and CLIC

Single Higgs boson production at the ILC in the left-right twin Higgs model

Can a pseudo-Nambu-Goldstone Higgs lead to symmetry non-restoration?

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