The anatomy of electroweak symmetry breaking

Djouadi, Abdelhak

doi:10.1016/j.physrep.2007.10.004

Cited by 997 publications

(929 citation statements)

References 809 publications

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“…Therefore for m h 120 GeV/c 2 the decay partial width into W W is at least two orders of magnitude larger than that into γγ, while at m h = 115 GeV/c 2 the W W partial width is larger by a factor of 30 [10], even though for these masses the W W channel is kinematically suppressed. However, we do not measure partial widths directly but only the event rate which is the production cross section times branching ratio:…”

Section: Enhancing Diphoton Resonancesmentioning

confidence: 92%

Singlet scalars as Higgs boson imposters at the Large Hadron Collider

2011

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An electroweak singlet scalar can couple to pairs of vector bosons through loop-induced dimension five operators. Compared to a Standard Model Higgs boson, the singlet decay widths in the diphotons and Zγ channels are generically enhanced, while decays into massive final states like W W and ZZ are kinematically disfavored. The overall event rates into γγ and Zγ can exceed the Standard Model expectations by orders of magnitude. Such a singlet may appear as a resonant signal in the γγ and Zγ channels, even with a mass above the W W kinematic threshold.

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Section: Enhancing Diphoton Resonancesmentioning

confidence: 92%

Singlet scalars as Higgs boson imposters at the Large Hadron Collider

2011

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“…We use [56,58] to compute the EWBG predictions for the Higgs decay widths. To understand the various correlations and predictions for EWBG quantitatively we define ratios of the various production channels, gluon fusion (ggF), vector boson fusion (VBF) and associated production (AP), in the LSS compared to the SM:…”

Section: The Fingerprint Of Electroweak Baryogenesismentioning

confidence: 99%

Excluding electroweak baryogenesis in the MSSM

Curtin

Jaiswal

Meade

2012

J. High Energ. Phys.

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In the context of the MSSM the Light Stop Scenario (LSS) is the only region of parameter space that allows for successful Electroweak Baryogenesis (EWBG). This possibility is very phenomenologically attractive, since it allows for the direct production of light stops and could be tested at the LHC. The ATLAS and CMS experiments have recently supplied tantalizing hints for a Higgs boson with a mass of ≈ 125 GeV. This Higgs mass severely restricts the parameter space of the LSS, and we discuss the specific predictions made for EWBG in the MSSM. Combining data from all the available ATLAS and CMS Higgs searches reveals a tension with the predictions of EWBG even at this early stage. This allows us to exclude EWBG in the MSSM at greater than (90) 98% confidence level in the (non-)decoupling limit, by examining correlations between different Higgs decay channels. We also examine the exclusion without the assumption of a ≈ 125 GeV Higgs. The Higgs searches are still highly constraining, excluding the entire EWBG parameter space at greater than 90% CL except for a small window of m h ≈ 117 − 119 GeV.

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“…where (C hXY /C SM hXY ) i with X, Y = g, γ, Z denotes S i (i = ±, R, I) contribution to the normalized hXY interaction, and A 0 , A 1/2 , A 1 , C 0 , C 1/2 and C 1 are loop functions defined in [39] with τ i = m 2 h /4M 2 i and η i = m 2 Z /4M 2 i . As a result, the decay width of h → XY is now given by [25] …”

Section: The Manohar-wise Modelmentioning

confidence: 99%

The SM extension with color-octet scalars: diphoton enhancement and global fit of LHC Higgs data

Cao

Wan

Yang

et al. 2013

J. High Energ. Phys.

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In light of the significant progress of the LHC to determine the properties of the Higgs boson, we investigate the capability of the Manohar-Wise model in explaining the Higgs data. This model extends the SM by one family of color-octet and isospin-doublet scalars, and it can sizably alter the coupling strengths of the Higgs boson with gluons and photons. We first examine the current constraints on the model, which are from unitarity, the LHC searches for the scalars and the electroweak precision data (EWPD). In implementing the unitarity constraint, we use the properties of the SU(3) group to simplify the calculation. Then in the allowed parameter space we perform a fit of the model, using the latest ATLAS and CMS data, respectively. We find that the Manohar-Wise model is able to explain the data with χ 2 significantly smaller than the SM value. We also find that the current Higgs data, especially the ATLAS data, are very powerful in further constraining the parameter space of the model. In particular, in order to explain the γγ enhancement reported by the ATLAS collaboration, the sign of the hgg coupling is usually opposite to that in the SM.

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The anatomy of electroweak symmetry breaking

Cited by 997 publications

References 809 publications

Singlet scalars as Higgs boson imposters at the Large Hadron Collider

Singlet scalars as Higgs boson imposters at the Large Hadron Collider

Excluding electroweak baryogenesis in the MSSM

The SM extension with color-octet scalars: diphoton enhancement and global fit of LHC Higgs data

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