Pith Number

pith:3F2J6LSG

pith:2026:3F2J6LSGSIKL4CONJVYOJKG72D

not attested not anchored not stored refs pending

Neutron star with dark matter using vector portal

Deepak Kumar (IISER Berhampur), Hiranmaya Mishra (IOP & NISER), Ranjita K. Mohapatra (Rajdhani College), Sudhanwa Patra (IIT Bhilai & IOP)

Neutron star observations constrain vector-portal fermionic dark matter

arxiv:2604.04560 v2 · 2026-04-06 · hep-ph · nucl-th

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\usepackage{pith}
\pithnumber{3F2J6LSGSIKL4CONJVYOJKG72D}

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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

We show that the precise measurements of neutron star properties, including the mass radius relation and tidal deformability from gravitational wave observations, X-ray and radio observations of pulsars, can shed light on properties of DM. [...] The vector portal DM scenario, with DM interaction with quarks via Z′ vector boson, can establish a direct connection to terrestrial searches, including direct and indirect detection and collider searches for the Z′ boson.

C2weakest assumption

The assumption that fermionic dark matter interacts with nucleons solely via the vector Z' portal inside the neutron star, that the relativistic mean field framework remains valid for the mixed system, and that no other interactions or phase transitions alter the equation of state in unmodeled ways.

C3one line summary

Vector portal fermionic dark matter admixed in neutron stars produces mediator-mass-dependent changes to the equation of state, yielding distinct mass-radius relations and tidal deformabilities that observations can use to constrain the model.

Receipt and verification

First computed	2026-07-14T00:18:25.074095Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d9749f2e469214be09cd4d70e4a8dfd0c24cae71c6c6d29cc199fc896e074bae

Aliases

arxiv: 2604.04560 · arxiv_version: 2604.04560v2 · doi: 10.48550/arxiv.2604.04560 · pith_short_12: 3F2J6LSGSIKL · pith_short_16: 3F2J6LSGSIKL4CON · pith_short_8: 3F2J6LSG

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/3F2J6LSGSIKL4CONJVYOJKG72D \
  | 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: d9749f2e469214be09cd4d70e4a8dfd0c24cae71c6c6d29cc199fc896e074bae

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "94596b53b9cc4dac6828f0b5d9ed0d1b79c2a9aff8373cb8706a363ba962d2f8",
    "cross_cats_sorted": [
      "nucl-th"
    ],
    "license": "http://creativecommons.org/publicdomain/zero/1.0/",
    "primary_cat": "hep-ph",
    "submitted_at": "2026-04-06T09:40:02Z",
    "title_canon_sha256": "5d7d23f43f08e81017383a04ac13da2fed594e2669368b37a2a8331fbffbdf77"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.04560",
    "kind": "arxiv",
    "version": 2
  }
}