# Shadow Higgs boson from a scale-invariant hidden U(1){sub s} model

## Abstract

We study a scale-invariant SU(2)xU(1){sub Y}xU(1){sub s} model which has only dimensionless couplings. The shadow U(1){sub s} is hidden, and it interacts with the standard model (SM) solely through mixing in the scalar sector and kinetic mixing of the U(1) gauge bosons. The gauge symmetries are broken radiatively by the Coleman-Weinberg mechanism. Lifting of the flat direction in the scalar potential gives rise to a light scalar, the scalon, or the shadow Higgs, and a heavier scalar which we identify as the SM Higgs boson. The phenomenology of this model is discussed. In particular, the constraints on the shadow Higgs in different mass ranges, and the possibility of discovering a shadow Higgs with a mass a few tens of GeV in precision t-quark studies at the LHC, are investigated.

- Authors:

- Department of Physics, National Tsing-Hua University, Hsinchu 300, Taiwan (China)
- (Canada)

- Publication Date:

- OSTI Identifier:
- 20929578

- Resource Type:
- Journal Article

- Resource Relation:
- Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 11; Other Information: DOI: 10.1103/PhysRevD.75.115016; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CERN LHC; GAUGE INVARIANCE; GEV RANGE 10-100; HIGGS BOSONS; HIGGS MODEL; MASS; STANDARD MODEL; SU-2 GROUPS; T QUARKS; U-1 GROUPS

### Citation Formats

```
Chang, W.-F., Ng, John N., Wu, Jackson M. S., and Theory group, TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C.
```*Shadow Higgs boson from a scale-invariant hidden U(1){sub s} model*. United States: N. p., 2007.
Web. doi:10.1103/PHYSREVD.75.115016.

```
Chang, W.-F., Ng, John N., Wu, Jackson M. S., & Theory group, TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C.
```*Shadow Higgs boson from a scale-invariant hidden U(1){sub s} model*. United States. doi:10.1103/PHYSREVD.75.115016.

```
Chang, W.-F., Ng, John N., Wu, Jackson M. S., and Theory group, TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C. Fri .
"Shadow Higgs boson from a scale-invariant hidden U(1){sub s} model". United States.
doi:10.1103/PHYSREVD.75.115016.
```

```
@article{osti_20929578,
```

title = {Shadow Higgs boson from a scale-invariant hidden U(1){sub s} model},

author = {Chang, W.-F. and Ng, John N. and Wu, Jackson M. S. and Theory group, TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C.},

abstractNote = {We study a scale-invariant SU(2)xU(1){sub Y}xU(1){sub s} model which has only dimensionless couplings. The shadow U(1){sub s} is hidden, and it interacts with the standard model (SM) solely through mixing in the scalar sector and kinetic mixing of the U(1) gauge bosons. The gauge symmetries are broken radiatively by the Coleman-Weinberg mechanism. Lifting of the flat direction in the scalar potential gives rise to a light scalar, the scalon, or the shadow Higgs, and a heavier scalar which we identify as the SM Higgs boson. The phenomenology of this model is discussed. In particular, the constraints on the shadow Higgs in different mass ranges, and the possibility of discovering a shadow Higgs with a mass a few tens of GeV in precision t-quark studies at the LHC, are investigated.},

doi = {10.1103/PHYSREVD.75.115016},

journal = {Physical Review. D, Particles Fields},

number = 11,

volume = 75,

place = {United States},

year = {Fri Jun 01 00:00:00 EDT 2007},

month = {Fri Jun 01 00:00:00 EDT 2007}

}