Four Generations and Higgs Physics

Abstract

In the light of the LHC, we revisit the implications of a fourth generation of chiral matter. We identify a specific ensemble of particle masses and mixings that are in agreement with all current experimental bounds as well as minimize the contributions to electroweak precision observables. Higgs masses between 115-315 (115-750) GeV are allowed by electroweak precision data at the 68% and 95% CL. Within this parameter space, there are dramatic effects on Higgs phenomenology: production rates are enhanced, weak-boson-fusion channels are suppressed, angular distributions are modified, and Higgs pairs can we observed. We also identify exotic signals, such as Higgs decay to same-sign dileptons. Finally, we estimate the upper bound on the cutoff scale from vacuum stability and triviality.

11 pages, 7 figures, REVTeX

References in corpus (9)

• Anomalous Higgs boson couplings in vector boson fusion at the CERN LHC
• Is Vtb=1 ?
• Evidence for production of single top quarks and first direct measurement of |Vtb|
• t' at the LHC: the physics of discovery
• The discovery of the fourth family at the LHC: what if?
• Using jet mass to discover vector quarks at the LHC
• Broadening the Higgs Boson with Right-Handed Neutrinos and a Higher Dimension Operator at the Electroweak Scale
• Disentangling Dimension Six Operators through Di-Higgs Boson Production
• Model-Independent Description and Large Hadron Collider Implications of Suppressed Two-Photon Decay of a Light Higgs Boson

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