Dataset

GSI-2026-00075

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Measurement of the production cross section of prompt $\Xi^0_{\rm c}$ baryons in p$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}~=~5.02$ TeV

ALICE Collaboration (Corresponding author)

2024

Please use a persistent id in citations: doi:10.17182/HEPDATA.155330.V1

Abstract: CERN-LHC. ALICE. The transverse momentum ($p_\mathrm{T}$) differential production cross section of the promptly produced charm-strange baryon $\Xi_\mathrm{c}^0$ (and its charge conjugate $\overline{\Xi_\mathrm{c}^0}$) is measured at midrapidity via its hadronic decay into ${\pi^{+}}\Xi^{-}$ in p$-$Pb collisions at a centre-of-mass energy per nucleon$-$nucleon collision $\sqrt{s_\mathrm{NN}}= 5.02$ TeV with the ALICE detector at the LHC. The $\Xi_\mathrm{c}^0$ nuclear modification factor ($R_\mathrm{pPb}$), calculated from the cross sections in pp and p$-$Pb collisions, is presented and compared with the $R_\mathrm{pPb}$ of $\mathrm{\Lambda_c^+}$ baryons. The ratios between the $p_\mathrm{T}$-differential production cross section of $\Xi_\mathrm{c}^0$ baryons and those of $\mathrm{D^0}$ mesons and $\mathrm{\Lambda_c^+}$ baryons are also reported and compared with results at forward and backward rapidity from the LHCb Collaboration. The measurements of the production cross section of prompt $\Xi^0_\mathrm{c}$ baryons are compared with a model based on perturbative QCD calculations of charm-quark production cross sections, which includes only cold nuclear matter effects in p$-$Pb collisions, and underestimates the measurement by a factor of about 50. This discrepancy is reduced when the data is compared with a model that includes string formation beyond leading-colour approximation or in which hadronisation is implemented via quark coalescence. The $p_\mathrm{T}$-integrated cross section of prompt $\Xi^0_\mathrm{c}$-baryon production at midrapidity extrapolated down to $p_\mathrm{T}$ = 0 is also reported. These measurements offer insights and constraints for theoretical calculations of the hadronisation process. Additionally, they provide inputs for the calculation of the charm production cross section in p$-$Pb collisions at midrapidity.

Note: Journal Article GSI record: GSI-2026-00073

---

Contributing Institute(s):

1. ALICE (ALI)
2. Detektorlabor (DTL)
3. IT (CIT)
4. ExtreMe Matter Institute, EMMI (EXM)
5. Collaboration CERN: ALICE (ALICE@CERN)

Research Program(s):

1. 612 - Cosmic Matter in the Laboratory (POF4-612) (POF4-612)
2. HGS-HIRe - HGS-HIRe for FAIR (HGS-HIRe) (HGS-HIRe)
3. SUC-GSI-Heidelberg - Strategic university cooperation GSI-U Heidelberg (SUC-GSI-HE) (SUC-GSI-HE)
4. SUC-GSI-Frankfurt - Strategic university cooperation GSI-U Frankfurt/M (SUC-GSI-FR) (SUC-GSI-FR)
5. SUC-GSI-Darmstadt - Strategic university cooperation GSI-TU Darmstadt (SUC-GSI-DA) (SUC-GSI-DA)
6. STRONG-2020 - The strong interaction at the frontier of knowledge: fundamental research and applications (824093) (824093)

Experiment(s):

1. LHC: ALICE

---

---

Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article Acharya, S. ; Adamova, D. ; Agarwal, A. ; et al
Measurement of the production cross section of prompt $\Xi ^0_{\textrm{c}}$ baryons in p–Pb collisions at $\sqrt{s_{{\textrm{NN}}}}=5.02$ TeV
The European physical journal / C 85(1), 86 (2025) [10.1140/epjc/s10052-024-13531-w]2025   Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

---