Higgs Boson and Top-Quark Masses and Parity-Symmetry Restoration

Abstract

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\approx 4.27 TeV 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 m_H\approx 126.7 GeV and top-quark mass m_t\approx 172.7 GeV are obtained without drastically fine-tuning the four-fermion coupling.

11 pages, 2 figures. the final version to appear in Phys. Lett. B. arXiv admin note: substantial text overlap with arXiv:1301.4254

References in corpus (6)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Can the 126 GeV boson be a pseudoscalar?
• The phase structure of Einstein-Cartan theory
• Why is the top quark much heavier than other fermions?
• "Super"-Dilatation Symmetry of the Top-Higgs System

Cited by in corpus (14)

• Shedding New Light on Sterile Neutrinos from XENON1T Experiment
• Ultraviolet fixed point and massive composite particles in TeV scales
• Vectorlike $W^{\pm }$-boson coupling at TeV and third family fermion masses
• An effective strong-coupling theory of composite particles in UV-domain
• Resonant and nonresonant new phenomena of four-fermion operators for experimental searches
• Phenomenology at the LHC of composite particles from strongly interacting Standard Model fermions via four-fermion operators of NJL type
• Hierarchy spectrum of SM fermions: from top quark to electron neutrino
• $W$ boson mass tension caused by its right-handed gauge coupling at high energies?
• Composite Fermions and their Pair States in a Strongly-Coupled Fermi Liquid
• Higgs boson origin from a gauge symmetric theory of massive composite particles and massless $W^{\pm }$ and $Z^0$ bosons at the TeV scale
• Spontaneous Peccei-Quinn symmetry breaking renders sterile neutrino, axion and $\chi$boson to be candidates for dark matter particles
• Constraints on NJL four-fermion effective interactions from neutrinoless double beta decay
• Searching for exclusive leptoquarks with the Nambu-Jona-Lasinio composite model at the LHC and HL-LHC
• Critical fermion density for restoring spontaneously broken symmetry