Constraining hadronization mechanisms with $\rm Λ_{\rm c}^{+}$/D$^0$ production ratios in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV

Collaboration, ALICE

doi:10.48550/arxiv.2112.08156

Cited by 8 publications

(22 citation statements)

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“…Before displaying the predictions obtained with our new hadronization scheme, we discuss how its few free parameters have been fixed through a comparison with experimental data obtained in central Pb-Pb collisions at √ s NN = 5.02 TeV [34,43,44]. In Fig.…”

Section: Resultsmentioning

confidence: 99%

“…5. By itself such a quantity, already in pp collisions and independently from the modelling of hadronization, would be affected by large systematic uncertainties arising from the [34,43,44]. Theoretical curves, referring to different transport coefficients, have been normalized to the experimental integrated yield per event of D 0 mesons choice of the parameters entering into the simulation of the initial Q Q production performed with the POWHEG-BOX event generator (quark mass, renormalization and factorization scales).…”

Section: Resultsmentioning

confidence: 99%

“…This hadronization mechanism, analogous to the one at work in nucleus-nucleus collisions, naturally explains the p T dependence of the Λ + c /D 0 ratio. The latter can be studied also for different densities of the produced system, from low to high-multiplicity pp collisions [33] and from peripheral to central nucleus-nucleus collisions [34]. In both cases one observes a shift of the Λ + c production towards larger values of p T when the surrounding environment gets denser, suggesting a common mechanism of hadronization in these collisions which leads Λ + c to inherit the radial flow of the fireball.…”

Section: Introductionmentioning

confidence: 99%

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In-medium hadronization of heavy quarks and its effect on charmed meson and baryon distributions in heavy-ion collisions

et al. 2022

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We present a new model for the description of heavy-quark hadronization in relativistic heavy-ion collisions in the presence of a reservoir of lighter thermal particles with which recombination can occur leading to the formation of color-singlet clusters. Color neutralization is assumed to occur locally, within the same fluid cell occupied by the heavy quark and it proceeds via the recombination of the latter with light antiquarks (quarks) or diquarks (anti-diquarks), which are assumed to be present in the medium with thermal abundance as effective degrees of freedom around the QCD crossover temperature $$T_c$$ T c . Typically the resulting color-singlet clusters have quite low invariant mass, in most of the cases below 4 GeV, and in this case they are assumed to undergo an isotropic 2-body decay in their local rest-frame. Heavier clusters are instead fragmented as Lund strings. The possibility of recombination with light diquarks enhances the yields of charmed baryons, in qualitative agreement with recent measurements. The assumption of local color neutralization leads to a strong space-momentum correlation, which provides a substantial enhancement of the collective flow of the final-state charmed hadrons, affecting both their momentum and their angular distributions.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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In-medium hadronization of heavy quarks and its effect on charmed meson and baryon distributions in heavy-ion collisions

et al. 2022

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“…The first measurements at the LHC in PbPb collisions at √ s N N =5.02 TeV were to larger transverse momenta: ALICE reported a large ratio of Λ c /D [226] of around 1 at p T 6-12 GeV/c, CMS of around 0.2 for 10GeV/c > p T > 20GeV/c 10 and 20 [227]. Recently, ALICE extended the Λ c measurement in PbPb collisions down to a transverse momentum of 1 GeV/c [497]. The shows a sizeable transverse momentum dependence.…”

Section: Heavy-flavor and Jet Hadronizationmentioning

confidence: 99%

Heavy quarks and jets as probes of the QGP

Apolinário¹,

Lee²,

Winn³

2022

Preprint

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The Quark-Gluon Plasma (QGP), a QCD state of matter created in ultrarelativistic heavy-ion collisions, has remarkable properties as a low shear viscosity over entropy ratio. Through the detection of multi-particle production, the bulk debris of the collision, these so-called soft probes have provided quantitative insight into the created matter. However, its fast evolution and thermalization properties remain elusive to the soft sector. Only the usage of high momentum objects as probes of the QGP can unveil its constituents at the different wavelengths. In this review, we attempt to provide a comprehensive picture of what was, so far, possible to withdraw given our current theoretical understanding of jets, heavy-flavor, and quarkonia. We will bridge the resulting qualitative picture to the experimental observations done at both the LHC and RHIC. We will focus on the phenomenological description of experimental observations, provide a brief analytical summary of the description of hard probes, and an outlook towards the main difficulties we will need to surpass in the following years. To benchmark QGP-related effects, we will also address nuclear modifications to the initial state and hadronization effects.

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“…Figure 4.6: The Λ + c /D 0 yield ratio as a function of p T in 5.02 TeV 0-10% (left panel) and 30-50% (middle panel) central Pb-Pb and pp (right panel) collisions compared with predictions of different theoretical calculations[146,107,150,148,80]. Figure taken from Ref [155]…”

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confidence: 99%

Heavy-Quark Diffusion in the Quark-Gluon Plasma

He¹,

Hees²,

Rapp³

2022

Preprint

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The diffusion of heavy quarks through the quark-gluon plasma (QGP) as produced in high-energy heavy-ion collisions has long been recognized as an excellent probe of its transport properties. In addition, the experimentally observed heavy-flavor hadrons carry valuable information about the hadronization process of the transported quarks. Here we review recent progress in the theoretical developments of heavy-quark interactions in the QGP and how they relate to the nonperturbative hadronization process, and discuss the recent status of the pertinent phenomenology in heavy-ion collisions at the RHIC and the LHC. The interactions of heavy quarks in the QGP also constitute a central building block in the description of the heavy quarkonia which controls their transport parameters as well. We will thus focus on theoretical approaches that aim for a unified description of open and hidden heavy-flavor particles in medium, and discuss how they can be constrained by lattice QCD "data" and utilized to deduce fundamental properties of the microscopic interactions and emerging spectral properties of the strongly coupled QGP.

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Constraining hadronization mechanisms with $\rm Λ_{\rm c}^{+}$/D$^0$ production ratios in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV

Cited by 8 publications

References 0 publications

In-medium hadronization of heavy quarks and its effect on charmed meson and baryon distributions in heavy-ion collisions

In-medium hadronization of heavy quarks and its effect on charmed meson and baryon distributions in heavy-ion collisions

Heavy quarks and jets as probes of the QGP

Heavy-Quark Diffusion in the Quark-Gluon Plasma

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