Pith Number

pith:VRTORYIV

pith:2026:VRTORYIVLSVA6DJIAGSBD5BKKM

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Forward hadron production in pp collisions at LHC energies from an event generator based on the color glass condensate framework

Hirotsugu Fujii, Kazunori Itakura, Shujun Zhao, Tetsufumi Hirano, Yasushi Nara

LHCb data favor HERA-constrained McLerran-Venugopalan variants over the original model for forward hadron production at LHC energies.

arxiv:2605.15494 v1 · 2026-05-15 · hep-ph · nucl-ex · nucl-th

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Claims

C1strongest claim

Our results indicate that the current LHCb data favor the MV^γ and MV^e models, while the differences from the original MV model become more pronounced at higher transverse momentum and at mid-rapidity. We found that the kT factorization framework provides a better description of the particle production spectra at mid-rapidity than the DHJ framework.

C2weakest assumption

The assumption that the Monte Carlo implementation of the rcBK evolution with the chosen initial conditions and the selected factorization schemes fully captures the dominant physics of forward hadron production in pp collisions at LHC energies, without large contributions from unmodeled higher-order corrections or non-CGC mechanisms.

C3one line summary

MC-CGC simulations with rcBK evolution favor HERA-tuned MV^γ and MV^e initial conditions for LHCb forward hadron data, show kT factorization outperforming DHJ at mid-rapidity, and provide predictions for ALICE FoCal neutral mesons and jets.

References

82 extracted · 82 resolved · 51 Pith anchors

[1] We will also investigate observables that were not discussed in the previous work

[2] Figure 4 presents the pseudo-rapidity (𝜂) and the transverse momentum (𝑝 𝑇) distribution of charged particles, d𝑁ch/d𝜂and d𝑁 ch/d𝑝 𝑇 in pp collisions at √𝑠=7 TeV

[3] 7 presents the𝑝 𝑇 spectra at RHIC collision energy of √𝑠=200 GeV (left panel) and at the mid-rapidity region at the LHC energy of √𝑠=13 TeV (right panel)

[4] ch P(N DHJ, MV, K=1.0 , K=2.0 eDHJ, MV, K=1.4 γ DHJ, MV>0.2 GeV T LHCb pp 7TeV, p8 10×<2.5, η2.0<6 10×<3.0, η2.5<4 10×<3.5, η3.0<2 10×<4.0, η3.5<0 10×<4.5, η4.0< 2 4 6 8 10 12 14 16 18 20 22 ch N6 −10

[5] 5: Charged particle multiplicity distribution𝑃(𝑁 ch)within different𝜂(left) and𝑝 𝑇 (right) bins in pp collisions at√𝑠=7 TeV

Receipt and verification

First computed	2026-05-20T00:01:01.559573Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac66e8e1155caa0f0d2801a411f42a5319995edc7173fb7bb705b9a8864d6f27

Aliases

arxiv: 2605.15494 · arxiv_version: 2605.15494v1 · doi: 10.48550/arxiv.2605.15494 · pith_short_12: VRTORYIVLSVA · pith_short_16: VRTORYIVLSVA6DJI · pith_short_8: VRTORYIV

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/VRTORYIVLSVA6DJIAGSBD5BKKM \
  | 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: ac66e8e1155caa0f0d2801a411f42a5319995edc7173fb7bb705b9a8864d6f27

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2162605832fc1c876119f0ad7ddb007dc089c758f450c9cf4102d76a201efef5",
    "cross_cats_sorted": [
      "nucl-ex",
      "nucl-th"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "hep-ph",
    "submitted_at": "2026-05-15T00:19:14Z",
    "title_canon_sha256": "f61e9badf202d6913c87d4d99b02545da4e20fba032c9a08296fd747266a07a3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.15494",
    "kind": "arxiv",
    "version": 1
  }
}