Precision analysis of data concerning a fourth fermion generation with CKMfitter


Constraints on parameters for a fourth generation of fermions with the Standard Model of Particle Physics. The data of the Large-Hadron Collider at CERN on the production and decay channels of Higgs bosons allowed us to exclude a 4. fermion generation with high confidence.


Principal Investigators
Lacker, Heiko Prof. Dr. (Details) (Experimental Physics / Elementary Particles Physics II)

Duration of Project
Start date: 10/2010
End date: 06/2014

Research Areas
Particles, Nuclei and Fields

Research Areas
Elementarteilchenphysik

Publications
1. H. Lacker and A. Menzel,
“Simultaneous Extraction of the Fermi constant and PMNS matrix elements in the presence of a fourth generation”,
JHEP 1007 (2010) 006

2. H. Lacker, A. Menzel, F. Spettel, D. Hirschbühl, J. Lück, F. Maltoni, W. Wagner, M. Zaro,
“Model­independent extraction of |Vtq| matrix elements from top­quark measurements at hadron colliders”,
Eur. Phys. J. C72 (2012) 1644

3. O. Eberhardt, G. Herbert, H. Lacker, A. Lenz, A. Menzel, U. Nierste and M. Wiebusch,
“Joint analysis of Higgs decays and electroweak precision observables in the Standard Model with a sequential fourth generation”, Phys. Rev. D 86 (2012) 013011

4. O. Eberhardt, A. Lenz, A. Menzel, U. Nierste, and M. Wiebusch, “Status of the fourth generation before ICHEP2012: Higgs data and electroweak observables”, Phys. Rev. D86 (2012) 074014

5. O. Eberhardt, G. Herbert, H. Lacker, A. Lenz, A. Menzel, U. Nierste and M. Wiebusch,
“Impact of a Higgs boson at a mass of 126 GeV on the standard model with three and four fermion generations”,
Phys. Rev. Letters 109, 241802 (2012)

Last updated on 2021-07-01 at 13:37