Name: ALICE_2022_I1868463
Year: 2022
Summary: $\Sigma_c^{0,+,++}$ and $\Lambda_c$ from $\Sigma_c^{0,+,++}$ analysis
Experiment: ALICE
Collider: LHC
InspireID: 1868463
Status: VALIDATED
Reentrant: true
Luminosity_fb: 31.9e-6
Authors:
 - Marco Giacalone <mgiacalo@bo.infn.it>
References:
 - 'Phys.Rev.Lett. 128 (2022) 012001, 2022'
 - 'DOI:10.1103/PhysRevLett.128.012001'
 - 'arXiv:2106.08278'
RunInfo: Minimum bias events
Beams: [p+, p+]
Energies: [[6500,6500]]
Description:
  The $p_\mathrm{T}$-differential production cross sections of prompt ${D^{0}}$, ${\Lambda_{c}^{+}}$, and ${\Sigma_{c}^{0,++}}(2455)$ charmed hadrons are measured at midrapidity ($|y|<0.5$) in pp collisions at $\sqrt{s}=13$~TeV. This is the first measurement of ${\Sigma_{c}^{0,++}}$ production in hadronic collisions. Assuming the same production yield for the three $\Sigma_{c}^{0,+,++}$ isospin states, the baryon-to-meson cross section ratios $\Sigma_{c}^{0,+,++}/D^{0}$ and $\Lambda_{c}^{+}/D^{0}$ are calculated in the transverse momentum ($p_{T}$) intervals $2<p_{T}<12$~GeV/$c$ and $1<p_{T}<24$ ~GeV/$c$. Values significantly larger than in $e^{+}e^{-}$ collisions are observed, indicating for the first time that baryon enhancement in hadronic collisions also extends to the $\mathrm{\Sigma_{c}}$. The feed-down contribution to $\Lambda_{c}^{+}$ production from $\Sigma_{c}^{0,+,++}$ is also reported and is found to be larger than in $e^{+}e^{-}$ collisions. The data are compared with predictions from event generators and other phenomenological models, providing a sensitive test of the different charm-hadronisation mechanisms implemented in the models.
Keywords: [pp collisions, 13 TeV, charm production]
BibKey: ALICE:2021rzj 
BibTeX: '@article{ALICE:2021rzj,
    author = "Acharya, Shreyasi and others",
    collaboration = "ALICE",
    title = "{Measurement of Prompt D$^{0}$, $\Lambda_{c}^{+}$, and $\Sigma_{c}^{0,++}$(2455) Production in Proton\textendash{}Proton Collisions at $\sqrt s$ = 13\,\,TeV}",
    eprint = "2106.08278",
    archivePrefix = "arXiv",
    primaryClass = "hep-ex",
    reportNumber = "CERN-EP-2021-103",
    doi = "10.1103/PhysRevLett.128.012001",
    journal = "Phys. Rev. Lett.",
    volume = "128",
    number = "1",
    pages = "012001",
    year = "2022"
}'
