2013/08/31 by She-Sheng Xue
Physics and Astronomy · #Black Holes and Theoretical Physics #Bottom quark #Electroweak interaction #Fermion #Gauge (firearms) #Gauge boson #Gauge theory #Higgs boson #Higgs field #Higgs mechanism #Noncommutative and Quantum Gravity Theories #Particle physics #Particle physics theoretical and experimental studies #Physics #Quark #Spontaneous symmetry breaking #Standard Model (mathematical formulation) #Symmetry breaking #Technicolor #Top quark #Top quark condensate #hep-ex #hep-ph
paper · pdf · doi:10.1016/j.physletb.2013.10.024
published as Physics Letters B727 (2013) 308 · 11 pages, 2 figures. the final version to appear in Phys. Lett. B. arXiv admin note: substantial text overlap with arXiv:1301.4254
openalex publication_date 2013/10/16 · arxiv created 2013/10/22 · arxiv updated 2015/06/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The recent ATLAS and CMS experiments show the first observations of a new particle in the search for the Standard Model Higgs boson at the LHC. We revisit the scenario that high-dimensional operators of fermions must be present due to the theoretical inconsistency of the fundamental cutoff (quantum gravity) with the parity-violating gauge symmetry of the Standard Model. Studying the four-fermion interaction of the third quark family, we show that at an intermediate energy threshold E≈4.27×103GeV for the four-fermion coupling being larger than a critical value, the spontaneous symmetry-breaking phase transits to the strong-coupling symmetric phase where composite Dirac fermions form fully preserving the chiral gauge symmetry of the Standard Model and the parity-symmetry is restored. Under this circumstance, we perform the standard analysis of renormalization-group equations of the Standard Model in the spontaneous symmetry-breaking phase. As a result, the Higgs boson mass mH≈126.7GeV and top-quark mass mt≈172.7GeV are obtained without drastically fine-tuning the four-fermion coupling.