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Unparticle Physics

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arxiv hep-ph/0703260 v3 pith:RMOX5U5E submitted 2007-03-23 hep-ph

Unparticle Physics

classification hep-ph
keywords unparticlephysicsscalestuffdescribedenergyinvariantmathcal
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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I discuss some simple aspects of the low-energy physics of a nontrivial scale invariant sector of an effective field theory -- physics that cannot be described in terms of particles. I argue that it is important to take seriously the possibility that the unparticle stuff described by such a theory might actually exist in our world. I suggest a scenario in which some details of the production of unparticle stuff can be calculated. I find that in the appropriate low energy limit, unparticle stuff with scale dimension $d_{\mathcal{U}}$ looks like a non-integral number $d_{\mathcal{U}}$ of invisible particles. Thus dramatic evidence for a nontrivial scale invariant sector could show up experimentally in missing energy distributions.

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Cited by 8 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Universal Description of Decoherence in Scale-Invariant Environments

    hep-ph 2026-04 unverdicted novelty 7.0

    Decoherence in scale-invariant environments is uniquely equivalent to an unparticle bath characterized by scaling dimension d_U, which fixes all exponents via consistency relations and predicts a coherence-protection ...

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  3. Strongly Coupled Sectors in Inflation: Gapless Theories and Unparticles

    hep-th 2025-03 unverdicted novelty 7.0

    Computes inflationary bispectra and trispectra from tree-level unparticle exchanges using Mellin-Barnes methods and symmetry-based differential equations, revealing that full shapes are needed to distinguish unparticl...

  4. Massive Graviton Dark Matter from a Gapped Continuum

    hep-th 2026-07 conditional novelty 6.0

    Radiative corrections in a 5D linear dilaton brane-world produce a long-lived massive graviton resonance and a holographic fluid, either or both of which can account for dark matter.

  5. Neutrino Dipole Moments and Radiative Signatures from Partial Compositeness

    hep-ph 2026-06 unverdicted novelty 6.0

    Partial compositeness with inverse seesaw yields neutrino dipole moments of 10^{-6} to 10^{-8} GeV^{-1} and predicts single- and multi-photon radiative signals at MiniBooNE and MINERvA.

  6. Scale-Invariant Open Quantum Systems

    hep-ph 2026-05 unverdicted novelty 6.0

    Scale-invariant open quantum systems are universally described by unparticle baths with scaling dimension d_U, producing non-Markovian kernels, a fractional Caldeira-Leggett master equation, and phase transitions at d...

  7. Kinematic Flow for Banana Loops and Unparticles

    hep-th 2026-04 unverdicted novelty 6.0

    Banana loop cosmological correlators are captured by master integrals from tubings of marked graphs, with connection matrices derived from activation, merger, swap, and copy rules unique to unparticle exchanges.

  8. Short-range production of three bottom mesons

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    Leading-order predictions for three-body point production rates of B and B* meson systems are derived in short-range NREFT from two-body input alone.