Influence of SU ( 2 ) ⊗ U ( 1 ) singlet scalars on Higgs boson signal at LHC
نویسنده
چکیده
We investigate a model of SU (2) ⊗ U (1) singlet scalars coupled to Standard Model. We point out that for the case of the maximal mixing between singlet scalars and standard Higgs boson the Higgs boson production cross section is smaller than the standard Higgs boson production by factor 1 N +1 , where N is the number of singlet scalars. For the case of big mixing Higgs boson could be nonobservable at LHC. However, there is also a possibility for the observation of scalar singlets at LHC. As a quasirealistic example we discuss supersymmetric SU (2) ⊗ U (1) electroweak model with an additional singlet chiral superfield.
منابع مشابه
Next to Minimal Higgs : Mass Bounds and Search Prospects
The Standard Model of electroweak interactions has one scalar doublet. The minimal extension of this sector is effected by adding a neutral, singlet scalar field. Depending on whether the singlet field has a non-zero vacuum expectation value, x, or not, the scenario has quite distinctive predictions. In particular, x 6= 0 produces a mixing between the usual SU(2) doublet and the singlet, giving...
متن کاملInert Doublet Dark Matter with an additional scalar singlet and 125 GeV Higgs Boson
In this work we consider a model for particle dark matter where an extra inert Higgs doublet and an additional scalar singlet is added to the Standard Model (SM) Lagrangian. The dark matter candidate is obtained from only the inert doublet. The stability of this one component dark matter is ensured by imposing a Z2 symmetry on this additional inert doublet. The additional singlet scalar has a v...
متن کاملOn the Unification of Higgs-Nambu Goldstone Boson in the Formation of Near-brane Exotic Scalar via Scherk-Shwarz Breaking in 5-Dimensional SU(6) Symmetry
The 5D Scherk-Schwarz breaking with orbifold S/Z2 in SU(6) symmetry under special condition leads to a dimensional deconstruction without gauge symmetry breaking where SU(6) Little Higgs-like scalars show up either as weakly-coupled or strongly-coupled. The latest, together with the broken fifth component of 5D gauge boson, composes Coleman-Weinberg potential which can be generalized by substit...
متن کاملar X iv : h ep - p h / 99 04 23 6 v 1 6 A pr 1 99 9 UCB – PTH – 99 / 13 LBNL – 43085 hep - ph / 9904236 April 1999
If spacetime contains large compact extra dimensions, the fundamental mass scale of nature, Λ, may be close to the weak scale, allowing gravitational physics to significantly modify electroweak symmetry breaking. Operators of the form (1/Λ2)|φ†Dμφ|2 and (1/Λ)φWμνB φ, where Wμν and B μν are the SU(2) and U(1) field strengths and φ is the Higgs field, remove the precision electroweak bound on the...
متن کاملPseudo - Axions in Little Higgs Models
Little Higgs models have an enlarged global symmetry which makes the Higgs boson a pseudo-Goldstone boson. This symmetry typically contains spontaneously broken U(1) subgroups which provide light electroweak-singlet pseu-doscalars. Unless such particles are absorbed as the longitudinal component of Z ′ states, they appear as pseudoscalars in the physical spectrum at the electroweak scale. We ou...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1997