Pith Number

pith:D6ZLF7EF

pith:2025:D6ZLF7EFIC6LSQOMRQX2YLL2PL

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Geometry of particle emission in UrQMD Ar+Sc collisions at SPS energies

Barnabas Porfy, Mate Csanad

Simulations of Ar+Sc collisions at SPS energies show two-pion pair sources follow Lévy-stable distributions whose parameters map to spatial scale, shape, and emission strength.

arxiv:2512.05019 v2 · 2025-12-04 · hep-ph · nucl-th

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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

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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

We find that the pair source can be described with Lévy-stable distributions. We subsequently interpret the physical meaning of the extracted Lévy parameters corresponding to the spatial scale, shape, and strength of the source.

C2weakest assumption

That the UrQMD Monte Carlo generator, after validation against hadronic spectra, produces realistic two-pion source distributions that can be directly compared to experimental femtoscopy measurements in Ar+Sc collisions.

C3one line summary

UrQMD simulations demonstrate that pion pair sources in Ar+Sc collisions at SPS energies are described by Lévy alpha-stable distributions, establishing a theoretical baseline for intermediate systems.

References

34 extracted · 34 resolved · 0 Pith anchors

[1] G. Goldhaber, W. B. Fowler, S. Goldhaber, and T. F. Hoang. Pion-pion correlations in antiproton annihi- lation events.Phys. Rev. Lett., 3:181, 1959 1959

[2] G. Goldhaber, S. Goldhaber, W.-Y. Lee, and A. Pais. Influence of Bose-Einstein statistics on the anti-proton proton annihilation process.Phys. Rev., 120:300, 1960 1960

[3] D. A. Brown and P. Danielewicz. Imaging of sources in heavy ion reactions.Phys. Lett. B, 398:252–258, 1997 1997

[4] S. S. Adler et al. Evidence for a long-range component in the pion emission source in Au + Au collisions at √sN N = 200 GeV.Phys. Rev. Lett., 98:132301, 2007 2007

[5] A. Adare et al. L´ evy-stable two-pion Bose-Einstein correlations in √sN N = 200 GeV Au+Au collisions. Phys. Rev. C, 97(6):064911, 2018. [Erratum: Phys.Rev.C 108, 049905 (2023)] 2018

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-20T00:04:18.507563Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1fb2b2fc8540bcb941cc8c2fac2d7a7ac47c5448f62afb2970f2bc69a878553b

Aliases

arxiv: 2512.05019 · arxiv_version: 2512.05019v2 · doi: 10.48550/arxiv.2512.05019 · pith_short_12: D6ZLF7EFIC6L · pith_short_16: D6ZLF7EFIC6LSQOM · pith_short_8: D6ZLF7EF

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/D6ZLF7EFIC6LSQOMRQX2YLL2PL \
  | 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: 1fb2b2fc8540bcb941cc8c2fac2d7a7ac47c5448f62afb2970f2bc69a878553b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e4fb3e36fcd354147bf1c7b44ffd37d26f530f8eebd3ba09d497295238978a8",
    "cross_cats_sorted": [
      "nucl-th"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "hep-ph",
    "submitted_at": "2025-12-04T17:34:21Z",
    "title_canon_sha256": "d508c3a629ec1c255aaa64efc5a9fa8c0ef4c3d9c1e57c75300ff88011d1fbe9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2512.05019",
    "kind": "arxiv",
    "version": 2
  }
}