Two particle azimuthal harmonics in pA collisions

Davy, Manyika Kabuswa; Marquet, Cyrille; Shi, Yu; Xiao, Bowen; Zhang, Cheng

doi:10.48550/arxiv.1808.09851

Cited by 7 publications

(12 citation statements)

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“…This calculation is a further extension of the two particle azimuthal correlation CGC calculation developed in Refs. [41,43,47,48,58]. Besides, we need to consider the splitting of cc pair from a gluon (g → cc) in order to produce a J/ψ meson in the final state.…”

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confidence: 99%

Elliptic Flow of Heavy Quarkonia in pA Collisions

et al. 2019

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Using the dilute-dense factorization in the Color Glass Condensate framework, we investigate the azimuthal angular correlation between a heavy quarkonium and a charged light hadron in protonnucleus collisions. We extract the second harmonic v2, commonly known as the elliptic flow, with the light hadron as the reference. This particular azimuthal angular correlation between a heavy meson and a light hadron has first been measured at the LHC recently. The experimental results indicate that the elliptic flows for heavy-flavor mesons (J/ψ and D 0 ) are almost as large as those for light hadrons. Our calculation demonstrates that this result can be naturally interpreted as an initial state effect due to the interaction between the incoming partons from the proton and the dense gluons inside the target nucleus. Since the heavy quarkonium v2 exhibits a weak mass dependence according to our calculation, we predict that the heavy quarkonium Υ should have a similar elliptic flow as compared to that of the J/ψ, which can be tested in future measurements.

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confidence: 99%

Elliptic Flow of Heavy Quarkonia in pA Collisions

et al. 2019

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“…However, no jet quenching has been confirmed in these small systems so far, e.g., R pA ∼ 1. On the other hand, the color glass condensate framework shows that the initial-state effect, i.e., the interaction between partons originated from the nucleon projectile and dense gluons inside the target nucleus before the onset of hydrodynamics evolution, can also generate significant amount of collectivity [63][64][65][66][67]. Nowadays, how to disentangle the contributions from initial and final state effects is still in hot debate.…”

Section: Introductionmentioning

confidence: 99%

Heavy and light flavor jet quenching in different collision systems at the LHC energies

Liu¹,

Xing²,

Wu³

et al. 2021

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Recent experiments have observed large anisotropic collective flows in high multiplicity protonlead collisions at the Large Hadron Collider (LHC), which indicates the possible formation of mini quark-gluon plasma (QGP) in small collision systems. However, no jet quenching has been confirmed in such small systems so far. To understand this intriguing result, the system size scan experiments have been proposed to bridge the gap between large and small systems. In this work, we perform a systematic study on both heavy and light flavor jet quenching in different collision systems at the LHC energies. Using our state-of-the-art jet quenching model, which combines the next-to-leadingorder perturbative QCD framework, a linear Boltzmann transport model and the (3+1)-dimensional viscous hydrodynamics simulation, we provide a good description of nuclear modification factor RAA for charged hadrons and D mesons in central and mid-central Pb+Pb and Xe+Xe collisions measured by CMS collaboration. We further predict the transverse momentum and centrality dependences of RAA for charged hadrons, D and B mesons in Pb+Pb, Xe+Xe, Ar+Ar and O+O collisions at the LHC energies. Our numerical results show a clear system size dependence for both light and heavy flavor hadron RAA across different collision systems. Sizable jet quenching effect is obtained for both heavy and light flavor hadrons in central O+O collisions at the LHC energies. Our study provides a significant bridge for jet quenching from large to small systems, and should be helpful for finding the smallest QGP droplet and the disappearance of QGP in relativistic nuclear collisions.

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“…For instance, despite the large elliptic flow coefficient (v 2 ) of D mesons in p-Pb collisions [34], their nuclear modification factor (R pA ) is found to be consistent with unity [35]. This has triggered hot debates on whether the collectivity observed in small systems originates from final-state QGP effects or from initial-state gluon saturation effects [36][37][38][39][40][41][42][43]. One possible way of disentangling the initial-state and finalstate contributions to jet observables is to scan the jet quenching effect across various sizes of nuclear collision systems [44,45].…”

Section: Introductionmentioning

confidence: 99%

Scaling behaviors of heavy flavor meson suppression and flow in different nuclear collision systems at the LHC

Li,

Xing,

et al. 2021

Preprint

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We explore the system size dependence of heavy-quark-QGP interaction by studying the heavy flavor meson suppression and elliptic flow in Pb-Pb, Xe-Xe, Ar-Ar and O-O collisions at the LHC. The space-time evolution of the QGP is simulated using a (3+1)-dimensional viscous hydrodynamic model, while the heavy-quark-QGP interaction is described by an improved Langevin approach that includes both collisional and radiative energy loss inside a thermal medium. Within this framework, we provides a reasonable description of the D meson suppression and flow coefficients in Pb-Pb collisions, as well as predictions for both D and B meson observables in other collision systems yet to be measured. We find a clear hierarchy for the heavy meson suppression with respect to the size of the colliding nuclei, while their elliptic flow coefficient relies on both the system size and the geometric anisotropy of the QGP. Sizable suppression and flow are predicted for both D and B mesons in O-O collisions, which serve as a crucial bridge of jet quenching between large and small collision systems. Scaling behaviors between different collision systems are shown for the nuclear suppression factor as a function of the participant number (Npart), and for the N 1/3 part -rescaled elliptic flow coefficient as a function of the centrality class of nuclear collisions.

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Two particle azimuthal harmonics in pA collisions

Cited by 7 publications

References 0 publications

Elliptic Flow of Heavy Quarkonia in pA Collisions

Elliptic Flow of Heavy Quarkonia in pA Collisions

Heavy and light flavor jet quenching in different collision systems at the LHC energies

Scaling behaviors of heavy flavor meson suppression and flow in different nuclear collision systems at the LHC

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