Resolving the RpA and v2 puzzle of D0 mesons in p−Pb collisions at the LHC

Zhang, Chao; Zheng, Liang; Shi, Shusu; Lin, Zi-Wei

doi:10.1016/j.physletb.2023.138219

Cited by 7 publications

(4 citation statements)

References 54 publications

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“…Recently, we have improved the AMPT model with a new quark coalescence [7], incorporated modern parton distribution functions of the free proton and a spatially-dependent nuclear shadowing [8], improved heavy flavor productions [9], and applied local nuclear scaling of the two key input parameters for self-consistent dependence on the system size or centrality [10]. The AMPT model used in this study [11] includes the above improvements. Regarding heavy quarks in the AMPT model, we also made further improvements by isolating the initial heavy quarks from the string melting process, including the initial state Cronin effect, and implementing the independent fragmentation process.…”

Section: The Improved Ampt Model For This Studymentioning

confidence: 99%

“…When a heavy quark and its coalescing partner(s) have a large relative distance or a large invariant mass, they are deemed unsuitable for quark coalescence. In such cases, the heavy quark undergoes hadronization through the independent fragmentation [11].…”

Section: Pos(hardprobes2023)090mentioning

confidence: 99%

“…This way, 𝑤 = 𝑤 0 for 𝑝+𝑝 collisions. For 𝑤 0 , we take the following parameterization [11] so that it depends on the Lund string fragmentation parameters 𝑎 L and 𝑏 L through the effective string tension [6]:…”

Section: Pos(hardprobes2023)090mentioning

confidence: 99%

“…Details about the values of the Lund string fragmentation parameters in the above parameterization can be found in Ref. [11]. As a result, for 𝑝+𝑝 collisions, 𝑤 = 0.375 GeV/𝑐.…”

Section: Pos(hardprobes2023)090mentioning

confidence: 99%

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Resolving the $R_{\rm pA}$ and $v_2$ puzzle of $D^0$ mesons in $p-$Pb collisions

Lin,

Zhang,

Zheng

et al. 2024

Proceedings of 11th International Conference on Hard and Elecctromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardPr

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It has been difficult to reconcile the experimental data on the 𝐷 0 meson nuclear modification factor and elliptic flow in 𝑝−Pb collisions at LHC energies. Here we study these observables with the string melting version of a multi-phase transport model, which has been improved with the implementation of the Cronin effect (or transverse momentum broadening) and independent fragmentation for charm quarks. Using a strong Cronin effect allows us to provide the first simultaneous description of the 𝐷 0 meson 𝑅 pA and 𝑣 2 data at 𝑝 T ≤ 8 GeV/𝑐. The model also provides a reasonable description of the 𝐷 0 meson 𝑝 T spectra and the low-𝑝 T (below ∼ 2 GeV/𝑐) charged hadron spectra in 𝑝 + 𝑝 and 𝑝−Pb collisions as well as 𝑅 pA and 𝑣 2 in 𝑝−Pb collisions. We find that both parton scatterings and the Cronin effect are important for the 𝐷 0 meson 𝑅 pA , while parton scatterings are mostly responsible for the 𝐷 0 meson 𝑣 2 . Our results indicate that it is crucial to include the Cronin effect for the simultaneous description of the 𝐷 0 meson 𝑅 pA and 𝑣 2 . Since the Cronin effect is expected to grow with the system size, this work implies that the Cronin effect could also be important for heavy hadrons in large systems.

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Section: The Improved Ampt Model For This Studymentioning

confidence: 99%

Section: Pos(hardprobes2023)090mentioning

confidence: 99%

Section: Pos(hardprobes2023)090mentioning

confidence: 99%

“…Details about the values of the Lund string fragmentation parameters in the above parameterization can be found in Ref. [11]. As a result, for 𝑝+𝑝 collisions, 𝑤 = 0.375 GeV/𝑐.…”

Section: Pos(hardprobes2023)090mentioning

confidence: 99%

See 2 more Smart Citations

Resolving the $R_{\rm pA}$ and $v_2$ puzzle of $D^0$ mesons in $p-$Pb collisions

Lin,

Zhang,

Zheng

et al. 2024

Proceedings of 11th International Conference on Hard and Elecctromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardPr

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Investigating the elliptic anisotropy of identified particles in p–Pb collisions with a multi-phase transport model

Tang,

Zheng,

Zhang

et al. 2024

NUCL SCI TECH

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Elliptic anisotropy of open-charm hadrons from parton scatterings in p -Pb collisions at energies available at the CERN Large Hadron Collider

Tang,

Lu,

Zhang

et al. 2024

Phys. Rev. C

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The elliptic azimuthal anisotropy coefficient (v2) of open-charm hadrons at midrapidity (|η<1|) was studied in p-Pb collisions at sNN=8.16 TeV using a multiphase transport () model including an additional charm quark–antiquark pair production trigger. The model provides a simultaneous description of the measured pT spectrum and v2 of the D0 meson, as well as the v2 of light flavor meson Ks0. We found that the D0 and Ks0 v2 are both significantly affected by different parton scatterings among charm and light quarks. In addition, the predictions for the v2 of other charm hadrons including D+, Ds+, and Λc+ in p-Pb collisions are given for the first time. The v2 of open-charm hadrons reasonably follows the number-of-constituent-quark (NCQ) scaling up to 2.5 GeV, strongly indicating the importance of partonic degrees of freedom for the collectivity of heavy flavors in high-multiplicity p-Pb collisions. These findings may hint at the formation of deconfined matter in small collision systems, and provide referential value for future measurements of azimuthal anisotropy at energies available at the CERN Large Hadron Collider. Published by the American Physical Society 2024

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Resolving the RpA and v2 puzzle of D0 mesons in p−Pb collisions at the LHC

Cited by 7 publications

References 54 publications

Resolving the $R_{\rm pA}$ and $v_2$ puzzle of $D^0$ mesons in $p-$Pb collisions

Resolving the $R_{\rm pA}$ and $v_2$ puzzle of $D^0$ mesons in $p-$Pb collisions

Investigating the elliptic anisotropy of identified particles in p–Pb collisions with a multi-phase transport model

Elliptic anisotropy of open-charm hadrons from parton scatterings in p -Pb collisions at energies available at the CERN Large Hadron Collider

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