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arxiv: 2606.03443 · v1 · pith:BK7PW6NWnew · submitted 2026-06-02 · ✦ hep-ph · hep-ex· physics.ins-det

Constraints on long-range neutrino interactions from a variety of U(1)^prime symmetries using atmospheric neutrinos at IceCube DeepCore

Pith reviewed 2026-06-28 09:37 UTC · model grok-4.3

classification ✦ hep-ph hep-exphysics.ins-det
keywords neutrino oscillationslong-range interactionsU(1) prime symmetriesIceCubeatmospheric neutrinosbeyond the Standard Modelgauge boson mediators
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0 comments X

The pith

IceCube DeepCore atmospheric neutrino data yields no evidence for long-range interactions from gauged U(1)' symmetries and sets new bounds.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The authors look for effects of new long-range forces on neutrinos that would come from gauging anomaly-free U(1)' symmetries. These forces, carried by very light vector bosons, would be produced by matter in the local and distant universe and would change the pattern of neutrino oscillations inside Earth. The study analyzes eight years of clean muon neutrino events from IceCube DeepCore and sees no departure from ordinary three-flavor oscillations. Limits are placed on the strength of the new interaction potentials and converted into bounds on the mediator's coupling and mass for many different U(1)' charge assignments.

Core claim

No evidence is found for the long-range neutrino interactions predicted by a broad class of anomaly-free flavor-dependent U(1)' symmetries in eight years of IceCube DeepCore atmospheric neutrino data, leading to stringent constraints on the corresponding interaction potentials and on the coupling strength and mass of the mediating gauge boson.

What carries the argument

The long-range interaction potential arising from gauged U(1)' symmetries, which modifies the effective Hamiltonian for neutrino propagation through Earth matter.

If this is right

  • No signal is observed, so the data exclude non-zero values of the LRI potential above certain thresholds for each symmetry considered.
  • The bounds apply across a wide range of mediator masses and couplings for the various U(1)' models.
  • These constraints are the first from atmospheric neutrinos for this class of symmetries.
  • Future data can improve the sensitivity to smaller interaction strengths.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • Similar searches could be extended to other neutrino sources such as solar or reactor neutrinos to provide independent checks.
  • The method could be adapted to test other types of new interactions that produce constant potentials.
  • If a future experiment detects a deviation matching one of the excluded potentials, it would indicate a specific U(1)' charge assignment.
  • These limits help guide model building for neutrino-related extensions of the Standard Model.

Load-bearing premise

The long-range interaction can be treated as a uniform potential added to the standard oscillation Hamiltonian without significant uncertainties from the distribution of matter in the universe.

What would settle it

A clear mismatch between the observed event rates in IceCube DeepCore and the predictions of standard neutrino oscillations when the LRI term is included at a strength above the reported bounds.

Figures

Figures reproduced from arXiv: 2606.03443 by Anil Kumar, Gopal Garg, J Krishnamoorthi, Sanjib Kumar Agarwalla.

Figure 1
Figure 1. Figure 1: FIG. 1. Constraints on the long-range neutrino interactions [PITH_FULL_IMAGE:figures/full_fig_p002_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: FIG. 2. The oscillation probabilities [PITH_FULL_IMAGE:figures/full_fig_p005_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: FIG. 3. The difference between the [PITH_FULL_IMAGE:figures/full_fig_p007_3.png] view at source ↗
Figure 4
Figure 4. Figure 4: FIG. 4. The difference between the expected MC events at [PITH_FULL_IMAGE:figures/full_fig_p008_4.png] view at source ↗
Figure 5
Figure 5. Figure 5: FIG. 5. Constraints on the LRI potential sourced by the [PITH_FULL_IMAGE:figures/full_fig_p009_5.png] view at source ↗
Figure 6
Figure 6. Figure 6: FIG. 6. Constraints on the LRI potential sourced by the [PITH_FULL_IMAGE:figures/full_fig_p010_6.png] view at source ↗
Figure 8
Figure 8. Figure 8: FIG. 8. Constraints on the LRI potentials induced by different [PITH_FULL_IMAGE:figures/full_fig_p010_8.png] view at source ↗
read the original abstract

Neutrino oscillation experiments provide a unique probe to search for the physics beyond the Standard Model. In this work, we search for a broad class of anomaly-free flavor-dependent $U(1)^\prime$ symmetries using atmospheric neutrino data for the first time. Gauging these $U(1)^\prime$ symmetries give rise to ultra-light vector gauge bosons mediating long-range interactions (LRI) of neutrinos. These new interactions are sourced by the matter present in local and distant Universe, which can affect oscillations of neutrinos passing through the Earth. We use 8 years of high-purity $\nu_\mu$ charged-current neutrino events from IceCube DeepCore to search for these new interactions. We find no evidence for such new interactions in the data sample and place stringent constraints on the corresponding LRI potentials. These results are also translated as the bounds on the coupling strength and mass of mediator over their wide ranges for a plethora of $U(1)^\prime$ symmetries.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

1 major / 1 minor

Summary. The paper claims to search for long-range neutrino interactions (LRI) arising from anomaly-free flavor-dependent U(1)' symmetries using 8 years of high-purity atmospheric ν_μ charged-current events from IceCube DeepCore. No evidence for deviations from standard three-flavor oscillations is found, yielding constraints on the LRI potentials that are then translated into bounds on mediator coupling strength and mass over wide ranges for multiple U(1)' charge assignments taken from prior literature.

Significance. If the analysis is robust, the result supplies new experimental constraints on a broad class of BSM models via neutrino oscillations, using real detector data for the first time in this context. The modeling of the sourced potential (local Earth plus distant universe) and its insertion into the oscillation Hamiltonian follows standard effective-potential methods, and the translation of limits to mediator parameters is a useful output for model builders.

major comments (1)
  1. [Methods] Methods section: the description of the high-purity event selection, systematic uncertainties, background modeling, and statistical treatment is insufficient to verify the soundness of the upper limits on the LRI potentials and the derived bounds.
minor comments (1)
  1. [Abstract] Abstract: the phrase 'stringent constraints' is used without quantitative comparison to existing limits from other neutrino or non-neutrino probes.

Simulated Author's Rebuttal

1 responses · 0 unresolved

We thank the referee for their careful reading of the manuscript and for recommending minor revisions. We address the major comment below.

read point-by-point responses
  1. Referee: [Methods] Methods section: the description of the high-purity event selection, systematic uncertainties, background modeling, and statistical treatment is insufficient to verify the soundness of the upper limits on the LRI potentials and the derived bounds.

    Authors: We agree that the Methods section would benefit from greater detail to allow independent verification of the analysis. In the revised manuscript we will expand the relevant subsections to include more explicit descriptions of the high-purity event selection criteria, the treatment and parameterization of systematic uncertainties, the background modeling, and the statistical procedure (including the likelihood construction and limit-setting method) used to obtain the constraints on the LRI potentials. revision: yes

Circularity Check

0 steps flagged

No significant circularity identified

full rationale

This is a standard experimental constraints analysis that uses 8 years of IceCube DeepCore atmospheric neutrino data to derive upper limits on LRI potentials (and translated mediator parameters) for multiple U(1)' charge assignments taken from external theory literature. The central result is a null finding against the standard three-flavor oscillation prediction; no derivation step, equation, or statistical procedure reduces by construction to a fitted input, self-citation chain, or ansatz. The modeling of the sourced potential follows the usual effective Hamiltonian approach and is not load-bearing on any internal circularity.

Axiom & Free-Parameter Ledger

0 free parameters · 2 axioms · 0 invented entities

The analysis rests on the standard three-flavor neutrino oscillation framework and the theoretical construction of anomaly-free U(1)' charge assignments; no new particles or forces are postulated beyond those already discussed in the literature.

axioms (2)
  • domain assumption Standard three-flavor neutrino oscillation framework holds in the absence of new interactions.
    The search is performed by looking for deviations from this baseline prediction.
  • domain assumption The U(1)' symmetries under consideration are anomaly-free and flavor-dependent as defined in prior theory papers.
    The paper searches for a broad class of such symmetries without re-deriving their anomaly cancellation conditions.

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discussion (0)

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Reference graph

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