Pith Number

pith:HH6CG2Y6

pith:2026:HH6CG2Y6HXX53VYHC2OKZDIJBD

not attested not anchored not stored refs pending

Perturbative QCD fitting of KEDR and BESIII $e^+e^-$ data for R(s) and $\alpha_s$ determination

A.L.Kataev (INR RAS, BLTP JINR), K.Yu.Todyshev (Budker INP RAS, Novosibirsk State University)

Fits of KEDR and BESIII R(s) data to perturbative QCD show α_s(M_Z) increasing with truncation order up to 0.1312

arxiv:2603.29803 v3 · 2026-03-31 · hep-ph · hep-ex

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HH6CG2Y6HXX53VYHC2OKZDIJBD}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

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

The next-to-leading order, next-to-next-to-leading order and next-to-next-to-next-to-leading order fits of the combined KEDR data and BESIII data, truncated at the mass scale of J/Ψ meson, give α_s(M_Z)=0.1179^{+0.0051}_{-0.0069}, α_s(M_Z)=0.1221^{+0.0063}_{-0.0080} and α_s(M_Z)=0.1312^{+0.0027}_{-0.0067}.

C2weakest assumption

That fixed-order perturbative QCD expressions, after analytical continuation, accurately describe the measured R(s) data below charm threshold with negligible non-perturbative contributions.

C3one line summary

Combined fits of KEDR and BESIII R(s) data yield alpha_s(M_Z) = 0.1179, 0.1221, and 0.1312 at NLO, NNLO, and NNNLO, demonstrating strong dependence on perturbative truncation order.

Formal links

2 machine-checked theorem links

Cited by

1 paper in Pith

Dispersive estimation of the LO hadronic contribution to the muon ${g-2}$: fitting incompatible ${e^+e^-}$ data

Receipt and verification

First computed	2026-06-08T01:05:10.715055Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

39fc236b1e3defddd707169cac8d0908c3550cecc0f4a4edb8b327bfe846a90e

Aliases

arxiv: 2603.29803 · arxiv_version: 2603.29803v3 · doi: 10.48550/arxiv.2603.29803 · pith_short_12: HH6CG2Y6HXX5 · pith_short_16: HH6CG2Y6HXX53VYH · pith_short_8: HH6CG2Y6

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/HH6CG2Y6HXX53VYHC2OKZDIJBD \
  | 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: 39fc236b1e3defddd707169cac8d0908c3550cecc0f4a4edb8b327bfe846a90e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e1126d67d6b85d6a323c6cc14a6b692358633ebe1320bc92cdecc12823939513",
    "cross_cats_sorted": [
      "hep-ex"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-ph",
    "submitted_at": "2026-03-31T14:32:56Z",
    "title_canon_sha256": "cfecc05b9cca5e1d0d2278b5d91240dec024b1bb9a5374890e9dfdf95eef857f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2603.29803",
    "kind": "arxiv",
    "version": 3
  }
}