Pith Number

pith:BJCFFTG7

pith:2026:BJCFFTG7VYQ7ECGICGZQ255KXK

not attested not anchored not stored refs pending

Exploring the interplay of late-time dynamical dark energy and new physics before recombination

Adri\`a G\'omez-Valent, Alex Gonz\'alez-Fuentes

If recombination physics stays standard, data favor phantom-crossing dark energy and exclude LambdaCDM at up to 3 sigma.

arxiv:2603.26560 v3 · 2026-03-27 · astro-ph.CO · gr-qc

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\usepackage{pith}
\pithnumber{BJCFFTG7VYQ7ECGICGZQ255KXK}

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

if the physics prior to decoupling is unmodified, the probability of phantom crossing is ∼96.7–98.5%, with ΛCDM excluded at ∼2.5σ and ∼3σ CL.

C2weakest assumption

The assumption that recombination physics remains standard when introducing early new physics, combined with the reliability of the SH0ES versus CCHP cosmic ladder calibrations that drive the matter density tension.

C3one line summary

Model-independent reconstruction finds 96.7-98.5% probability of phantom crossing if recombination is standard, but early new physics to ease Hubble tension weakens this preference while requiring unrealistically high matter density.

Formal links

2 machine-checked theorem links

Cited by

5 papers in Pith

Signatures of Modified Gravity Below $\mathcal{O}(10)$ Mpc in a Dynamical Dark Energy Background

No evidence for phantom crossing: local goodness-of-fit improvements do not persist under global Bayesian model comparison

Geometric Constraints on the Pre-Recombination Expansion History from the Hubble Tension

Double the axions, half the tension: multi-field early dark energy eases the Hubble tension

Constraints on Coupled Dark Energy in the DESI Era

Receipt and verification

First computed	2026-05-27T01:05:53.642543Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0a4452ccdfae21f208c811b30d77aaba80075e13e82376aa05c82f8377aad7ef

Aliases

arxiv: 2603.26560 · arxiv_version: 2603.26560v3 · doi: 10.48550/arxiv.2603.26560 · pith_short_12: BJCFFTG7VYQ7 · pith_short_16: BJCFFTG7VYQ7ECGI · pith_short_8: BJCFFTG7

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/BJCFFTG7VYQ7ECGICGZQ255KXK \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 0a4452ccdfae21f208c811b30d77aaba80075e13e82376aa05c82f8377aad7ef

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dc95b62909664d742875c3fce5e6e1d4e81c15dea1ca8448899f8af6d9d7a305",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2026-03-27T16:25:41Z",
    "title_canon_sha256": "fa44b306d4f01ebf612c435142f3fa86e5f45e3ac5f396df2c3127828efc1fa7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2603.26560",
    "kind": "arxiv",
    "version": 3
  }
}