Physical implications of a double right-handed gauge symmetry

Abstract

Guided by the flipping principle, we propose a novel extension of the Standard Model based on a double right-handed $U(1)$ gauge symmetry. In this framework, all left-handed fermions are neutral, while right-handed fermions of the third generation carry charges distinct from those of the first two generations. This structure naturally explains the observed Standard Model fermion mass hierarchy: the heavy masses of the third generation are generated at tree level, while the lighter masses of the first and second generations arise radiatively at the one-loop level. For the active neutrino sector, the tiny masses are generated through a combination of tree-level and two-loop seesaw mechanisms. Crucially, this approach successfully reproduces the observed neutrino mass hierarchy, with the atmospheric mass-squared difference generated at tree level and the solar neutrino mass squared difference emerging at the two-loop level. These hierarchical patterns stem from the interplay between gauge invariance and a residual parity symmetry that survives the spontaneous breaking of the extended gauge group. The same residual symmetry stabilizes a viable scalar singlet dark matter candidate, which we show can reproduce the observed relic abundance while remaining consistent with current direct detection bounds. After addressing constraints from electroweak precision tests and flavor-changing neutral currents, we explore the discovery prospects for the new neutral bosons at existing and future colliders, including the LEP, LHC, and a future ILC.

28 pages, 9 figures, 5 tables. Comments are welcome

References in corpus (22)

• Improved Naturalness with a Heavy Higgs: An Alternative Road to LHC Physics
• First Dark Matter Search with Nuclear Recoils from the XENONnT Experiment
• DARWIN: towards the ultimate dark matter detector
• NuFit-6.0: Updated global analysis of three-flavor neutrino oscillations
• Search for resonant and nonresonant new phenomena in high-mass dilepton final states at $\sqrt{s}=$ 13 TeV
• The Inert Dark Matter
• Dark Matter Search Results from 4.2 Tonne-Years of Exposure of the LUX-ZEPLIN (LZ) Experiment
• The Anatomy of Quark Flavour Observables in 331 Models in the Flavour Precision Era
• Dark Matter Search Results from 1.54 Tonne$\cdot$Year Exposure of PandaX-4T
• PandaX-xT: a Multi-ten-tonne Liquid Xenon Observatory at the China Jinping Underground Laboratory
• Light scalars coupled to photons and non-newtonian forces
• Probing the minimal $U(1{)}_X$ model at future electron-positron colliders via the fermion pair-production channel
• Two-component scalar and fermionic dark matter candidates in a generic U$(1{)}_X$ model
• Probing chiral and flavored $Z^{\prime }$ from cosmic bursts through neutrino interactions
• Flavor-dependent $U(1)$ extension inspired by lepton, baryon and color numbers
• Dequantization of electric charge: Probing scenarios of cosmological multi-component dark matter
• Phenomenology of a minimal extension of the standard model with a family-dependent gauge symmetry
• Flipped $U(1)$ extended Standard Model and Majorana dark matter
• Tri-hypercharge versus tri-darkcharge
• Questions of flavor physics and neutrino mass from a flipped hypercharge
• Scoto-seesaw model implied by flavor-dependent Abelian gauge charge
• Gauge origin of double dark parity and implication for dark matter