CERN LEP indications for two light Higgs bosons and the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="normal">U</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>1</mml:mn><mml:msup><mml:mo stretchy="false">)</mml:mo><mml:mo>′</mml:mo></mml:msup></mml:math>model

Demir, Durmuş A.; Solmaz, Levent; Solmaz, Saime

doi:10.1103/physrevd.73.016001

Cited by 14 publications

(16 citation statements)

References 52 publications

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“…Within the minimal supersymmetric standard model (MSSM) and other extensions [2][3][4][5], the excesses at 98 GeV and 115 GeV were interpreted as evi-1…”

Section: Introductionmentioning

confidence: 99%

“…A somewhat less significant 1.7 σ excess is seen around 115 GeV. Finally over the whole range s 1/2 > 100 GeV the confidence level is less than expected from background.Within the minimal supersymmetric standard model (MSSM) and other extensions [2][3][4][5], the excesses at 98 GeV and 115 GeV were interpreted as evi-1 …”

mentioning

confidence: 99%

“…Within the minimal supersymmetric standard model (MSSM) and other extensions [2][3][4][5], the excesses at 98 GeV and 115 GeV were interpreted as evi-dence for the presence of two Higgs bosons H i with couplings reduced by a factor α i to matter g 2 i = α i g 2 SM −Higgs . We will call such Higgs bosons fractional Higgses in the following.…”

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confidence: 99%

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A higher-dimensional explanation of the excess of Higgs-like events at CERN LEP

Bij

Dilcher

2006

Physics Letters B

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Searches for the SM Higgs boson by the four LEP experiments have found a 2.3 σ excess at 98 GeV and a smaller 1.7 σ at around 115 GeV. We interpret these excesses as evidence for a Higgs boson coupled to a higher dimensional singlet scalar. The fit implies a relatively low dimensional mixing scale µ lhd < 50 GeV, which explains the low confidence level found for the background fit in the range s 1/2 > 100 GeV. The data show a slight preference for a fivedimensional over a six-dimensional field. This Higgs boson cannot be seen at the LHC, but can be studied at the ILC.With the latest developments from high energy colliders like LEP and the Tevatron the standard model (SM) has been established up to the loop level. The main missing ingredient is the direct detection of the SM Higgs boson. The four LEP experiments ALEPH, DELPHI, L3 and OPAL have extensively searched for the Higgs boson. The final combined result has been published in [1]. The absence of a clear signal has led to a lower limit on the Higgs boson mass of 114.4 GeV at the 95% confidence level. Although no clear signal was found the data have some intriguing features, that can be interpreted as evidence for Higgs bosons beyond the standard model. There is a 2.3 σ effect seen by all experiments at around 98 GeV. A somewhat less significant 1.7 σ excess is seen around 115 GeV. Finally over the whole range s 1/2 > 100 GeV the confidence level is less than expected from background.Within the minimal supersymmetric standard model (MSSM) and other extensions [2][3][4][5], the excesses at 98 GeV and 115 GeV were interpreted as evi-1

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“…Within the minimal supersymmetric standard model (MSSM) and other extensions [2][3][4][5], the excesses at 98 GeV and 115 GeV were interpreted as evi-1…”

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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A higher-dimensional explanation of the excess of Higgs-like events at CERN LEP

Bij

Dilcher

2006

Physics Letters B

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show abstract

“…Finally over the whole range √ s > 100 GeV the confidence level is less than expected from background. Within the minimal supersymmetric standard model (MSSM) and other extensions [2][3][4][5], the excesses at 98 GeV and 115 GeV were interpreted as evidence for the presence of two Higgs bosons H i with couplings to matter reduced by a factor α i , giving g 2 i = α i g 2 SM −Higgs . We will call such Higgs bosons fractional Higgses in the following.…”

Section: Description Of the Datamentioning

confidence: 99%

“…There are excesses at 98 GeV and 115 GeV, that were interpreted in [2][3][4][5] as evidence for the presence of two Higgs bosons. However the fits are somewhat unsatisfactory.…”

Section: Introductionmentioning

confidence: 99%

New spectra in the HEIDI Higgs models

Bij

Puliçe

2011

Nuclear Physics B

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We study the so-called HEIDI models, which are renormalizable extensions of the standard model with a higher dimensional scalar singlet field. As an additional parameter we consider a higher-dimensional mixing mass parameter. This leads to enriched possibilities compared to a previous study. We find effective spectral densities of the Higgs propagator, consisting of one, two or no particle peaks, together with a continuum. We compare with the LEP-2 data and determine for which range of the model parameters the data can be described. Assuming two peaks to be present we find for the new mass scale ν ≈ 56 ± 12 GeV, largely independent of the dimension. In the limiting case of d → 6 and two peaks we find a higher dimensional coupling constant α 6 = 0.70 ± 0.18, indicative of strong interactions among the higher dimensional fields. The LHC will not be able to study this Higgs field.

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Another step towards a no-lose theorem for NMSSM Higgs discovery at the LHC

2007

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We show how the LHC potential to detect a rather light CP-even Higgs boson of the NMSSM, H 1 or H 2 , decaying into CP-odd Higgs states, A 1 A 1 , can be improved if Higgs-strahlung off W bosons and (more marginally) off top-antitop pairs are employed alongside vector boson fusion as production modes. Our results should help extracting at least one Higgs boson signal over the NMSSM parameter space.

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CERN LEP indications for two light Higgs bosons and theU(1)′model

Cited by 14 publications

References 52 publications

A higher-dimensional explanation of the excess of Higgs-like events at CERN LEP

A higher-dimensional explanation of the excess of Higgs-like events at CERN LEP

New spectra in the HEIDI Higgs models

Another step towards a no-lose theorem for NMSSM Higgs discovery at the LHC

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