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High Energy Physics - Phenomenology · arXiv:1704.05023 v2 · submitted 17 Apr 2017

Right-handed neutrino dark matter in the classically conformal U(1)' extended Standard Model

Satsuki Oda, Nobuchika Okada, Dai-suke Takahashi

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The paper says

“Combining the electroweak vacuum stability condition, the LHC Run-2 bounds, and the cosmological constraint from the observed DM relic density, we find that all constrains complementarily work to narrow down the allowed parameter regions, and, especially, exclude mZ′ ≲ 3.5 TeV.”

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The paper

Abstract

We consider the dark matter (DM) scenario in the context of the classically conformal U(1)' extended standard model (SM), with three right-handed neutrinos (RHNs) and the U(1)' Higgs field. The model is free from all the U(1)' gauge and gravitational anomalies in the presence of the three RHNs. We introduce a Z2-parity in the model, under which an odd-parity is assigned to one RHN, while all the other particles is assigned to be Z2-even, and hence the Z2-odd RHN serves as a DM candidate. In this model, the U(1)' gauge symmetry is radiatively broken through the Coleman-Weinberg mechanism, by which the electroweak symmetry breaking is triggered. There are three free parameters in our model, the U(1)' charge of the SM Higgs doublet (xH), the new U(1)' gauge coupling (gX), and the U(1)' gauge boson (Z′) mass (mZ′), which are severely constrained in order to solve the electroweak vacuum instability problem, and satisfy the LHC Run-2 bounds from the search for Z′ boson resonance. In addition to these constraints, we investigate the RHN DM physics. Because of the nature of classical conformality, we find that a RHN DM pair mainly annihilates into the SM particles through the Z′ boson exchange. This is the so-called Z′-portal DM scenario. Combining the electroweak vacuum stability condition, the LHC Run-2 bounds, and the cosmological constraint from the observed DM relic density, we find that all constrains complementarily work to narrow down the allowed parameter regions, and, especially, exclude mZ′ ≲ 3.5 TeV. For the obtained allowed regions, we calculate the spin-independent cross section of the RHN DM with nucleons. We find that the resultant cross section well below the current experimental upper bounds.

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abstract compiled · 2026-09-23 · no language-model review

How the main claim is stated: asserted 1.00

What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.55 · human participants 0.01 · controlled comparison 0.02 · randomized assignment 0.01 · states quantitative result 0.98 · compares with prior results 0.13 · mentions code or data availability 0.02

The abstract, sentence by sentence

This table labels the abstract only (arXiv listing abstract v2). The number is the probability the classifier gave the label.

SentenceRoleThe authors' own workStates the main conclusionStrength
We consider the dark matter (DM) scenario in the context of the classically conformal U(1)' extended standard model (SM), with three right-handed neutrinos (RHNs) and the U(1)' Higgs field. contribution 0.62 0.61 0.03 asserted 0.84
The model is free from all the U(1)' gauge and gravitational anomalies in the presence of the three RHNs. result 0.33 0.41 0.03 asserted 1.00
We introduce a $Z_2$-parity in the model, under which an odd-parity is assigned to one RHN, while all the other particles is assigned to be $Z_2$-even, and hence the $Z_2$-odd RHN serves as a DM candidate. contribution 0.60 0.88 0.06 asserted 1.00
In this model, the U(1)' gauge symmetry is radiatively broken through the Coleman-Weinberg mechanism, by which the electroweak symmetry breaking is triggered. method 0.62 0.51 0.05 asserted 1.00
There are three free parameters in our model, the U(1)' charge of the SM Higgs doublet ($x_H$), the new U(1)' gauge coupling ($g_X$), and the U(1)' gauge boson ($Z'$) mass ($m_{Z'}$), which are severely constrained in order to solve the electroweak vacuum instability problem, and satisfy the LHC Run-2 bounds from the search for $Z'$ boson resonance. method 0.50 0.43 0.08 asserted 1.00
In addition to these constraints, we investigate the RHN DM physics. contribution 0.96 0.82 0.02 asserted 0.78
Because of the nature of classical conformality, we find that a RHN DM pair mainly annihilates into the SM particles through the $Z'$ boson exchange. result 0.93 0.94 0.08 asserted 1.00
This is the so-called $Z'$-portal DM scenario. interpretation 0.83 0.25 0.04 asserted 0.99
Combining the electroweak vacuum stability condition, the LHC Run-2 bounds, and the cosmological constraint from the observed DM relic density, we find that all constrains complementarily work to narrow down the allowed parameter regions, and, especially, exclude $m_{Z'} \lesssim 3.5$ TeV. result 1.00 0.96 0.64 asserted 1.00
For the obtained allowed regions, we calculate the spin-independent cross section of the RHN DM with nucleons. contribution 0.50 0.95 0.05 asserted 0.89
We find that the resultant cross section well below the current experimental upper bounds. result 1.00 0.96 0.16 asserted 1.00

What kind of paper the classifier reports this is: theoretical result 1.00 · evidence from proof or derivation 0.45

What was examined, and what was not

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How the labels were made

Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 8,576 input tokens.

Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. This record as JSON

Cited by 13 Pith papers

Reviewed papers on Pith that cite this one. The full citation record

  1. Theoretical consistency and phenomenology of supercooled cosmological phase transitions hep-ph · Jun 2026
  2. Constraining the heavy leptophilic neutral gauge bosons through the $Z\to\ell^+\ell^-$, $W^\pm\to\ell^\pm\nu_\ell$, and $h\to\ell^+\ell^-$ decays hep-ph · Mar 2026
  3. Supercool exit: Gravitational waves from QCD-triggered conformal symmetry breaking hep-ph · Mar 2023
  4. Conformal model for gravitational waves and dark matter: A status update astro-ph.CO · Oct 2022
  5. Phase transition and vacuum stability in the classically conformal B-L model hep-ph · Nov 2018
  6. Scalar assisted singlet doublet fermion dark matter model and electroweak vacuum stability hep-ph · Jun 2018
  7. The Dispirited Case of Gauged $U(1)_{B-L}$ Dark Matter hep-ph · Jun 2018
  8. Scale-Invariant Quadratic Gravity and Inflation in the Palatini Formalism astro-ph.CO · Apr 2021
  9. Gravitational waves from scale-invariant vector dark matter model: Probing below the neutrino-floor hep-ph · Jul 2019
  10. Constraining a general U(1)$^\prime$ inverse seesaw model from vacuum stability, dark matter and collider hep-ph · May 2019
  11. Conformal vector dark matter and strongly first-order electroweak phase transition hep-ph · Jan 2019
  12. Light $Z^\prime$ and Dark Matter from U(1)$_X$ Gauge Symmetry hep-ph · Mar 2020
  13. $Z^\prime$ portal dark matter in the minimal $B-L$ model hep-ph · Mar 2018
How the literature uses it

22 arXiv papers cite this in 25 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers citing it · 14 sentences without a confident label

Builds on it 1 paper
Uses its method or tool 1 paper
Cites it as background 9 papers

What it cites · 73 sentences without a confident label

Uses the method or tool of 2 papers
Uses data or values from 7 papers
Compares with 6 papers
  • The (red) upper solid (dashed) line shows the XENON1T [ref] (LUX 2016 [ref] ) upper bound on $σ_SI$ as a function of $m_Z^' ≃2 m_DM$, and the (red) dotted line shows the prospective reach for the upper bound on $σ_SI$ in the next-generation successor of the LUX experiment, the LUX-ZEPLIN (LZ) DM experiment [ref] .

    First Dark Matter Search Results from the XENON1T Experiment · Direct detection of RHN DM · 0.83

  • The (red) upper solid (dashed) line shows the XENON1T [ref] (LUX 2016 [ref] ) upper bound on $σ_SI$ as a function of $m_Z^' ≃2 m_DM$, and the (red) dotted line shows the prospective reach for the upper bound on $σ_SI$ in the next-generation successor of the LUX experiment, the LUX-ZEPLIN (LZ) DM experiment [ref] .

    Results from a search for dark matter in the complete LUX exposure · Direct detection of RHN DM · 0.83

  • The (red) upper solid (dashed) line shows the XENON1T [ref] (LUX 2016 [ref] ) upper bound on $σ_SI$ as a function of $m_Z^' ≃2 m_DM$, and the (red) dotted line shows the prospective reach for the upper bound on $σ_SI$ in the next-generation successor of the LUX experiment, the LUX-ZEPLIN (LZ) DM experiment [ref] .

    The Present and Future of Searching for Dark Matter with LUX and LZ · Direct detection of RHN DM · 0.83

Cites as background 36 papers

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