Multiple parton scattering in nuclei: Modified Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) evolution for fragmentation functions

Deng, Wei-Tian; Wang, Xin‐Nian

doi:10.1103/physrevc.81.024902

Cited by 91 publications

(41 citation statements)

References 56 publications

(92 reference statements)

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“…It should also be mentioned that the transport coefficient used in both approaches coincide, as the gluon transport coefficient used here would correspond to a quark transport coefficient given byq quark = 4/9q 0.025-0.032 GeV 2 /fm (in a W nucleus) perfectly matches the valueq quark = 0.024 ± 0.008 GeV 2 /fm used in Ref. [45] and extracted from semi-inclusive DIS measurements [46].…”

Section: E906 Preliminary Datasupporting

confidence: 76%

Initial-state energy loss in cold QCD matter and the Drell-Yan process

Arleo

Naim

Platchkov

2019

J. High Energ. Phys.

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The effects of parton energy loss in nuclear matter on the Drell-Yan process in pA and πA collisions at fixed-target energies are investigated. Calculations are based on the Baier-Dokshitzer-Mueller-Peigné-Schiff (BDMPS) framework embedded in a next-to-leading order calculation, using the transport coefficient extracted from J/ψ measurements. Model calculations prove in good agreement with preliminary measurements by the E906 experiment, despite a slightly different magnitude, supporting a consistent picture between Drell-Yan and J/ψ data. Predictions for the COMPASS future measurements in πA collisions at √ s = 18.9 GeV are also performed. At higher collision energy ( √ s = 38.7 GeV), Drell-Yan measurements are only slightly affected by energy loss effects. On the contrary, the E906 results turn out in clear disagreement with nuclear PDF effects alone. The comparison of E772, E866, and E906 measurements indicates for the first time a clear violation of QCD factorization in Drell-Yan production in pA collisions.

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Section: E906 Preliminary Datasupporting

confidence: 76%

Initial-state energy loss in cold QCD matter and the Drell-Yan process

Arleo

Naim

Platchkov

2019

J. High Energ. Phys.

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“…where C A = 3, and l T is the transverse momentum of radiated gluon. We assume the energy loss of a gluon is simply 9/4 times that of a quark [53]. The average number of radiated gluons from the propagating hard parton is calculated as [56],…”

Section: Frameworkmentioning

confidence: 99%

Extracting jet transport coefficient via single hadron and dihadron productions in high-energy heavy-ion collisions

et al. 2019

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Modifications of large transverse momentum single hadron, dihadron, and γ-hadron spectra in relativistic heavy-ion collisions are direct consequences of parton-medium interactions in the quarkgluon plasma (QGP). The interaction strength can be quantified by the jet transport coefficient q. We carry out the first global constraint on q using a next-to-leading order pQCD parton model with higher-twist parton energy loss and combining world experimental data on single hadron, dihadron, and γ-hadron suppression at both RHIC and LHC energies with a wide range of centralities. The global Bayesian analysis using the information field (IF) prior provides a stringent constraint on q(T ). We demonstrate in particular the progressive constraining power of the IF Bayesian analysis on the strong temperature dependence of q using data from different centralities and beam energies. We also discuss the advantage of using both inclusive and correlation observables with different geometric biases. As a verification, the obtained q(T ) is shown to describe data on single hadron anisotropy at high transverse momentum well. Predictions for future jet quenching measurements in oxygen-oxygen collisions are also provided.

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“…These can be directly measured using novel observables, such as the groomed soft-dropped momentum sharing distribution of the two leading subjets inside a reconstructed jet [2]. For jets propagating through hot or cold QCD matter, the vacuum splitting functions receive medium-induced contributions [3][4][5][6][7][8][9][10] where non-local destructive interference, known as the non-Abelian Landau-Pomeranchuk-Migdal (LPM) effect [11][12][13][14][15][16], plays an important role. These modifications can then be calculated order by order in powers of the opacity χ, the average number of scatterings in the medium.…”

Section: Introductionmentioning

confidence: 99%

A complete set of in-medium splitting functions to any order in opacity

2019

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In this Letter we report the first calculation of all O(αs) medium-induced branching processes to any order in opacity. Our splitting functions results are presented as iterative solutions to matrix equations with initial conditions set by the leading order branchings in the vacuum. The flavor and quark mass dependence of the in-medium q → qg, g → gg, q → gq, g → qq processes is fully captured by the light-front wavefunction formalism and the color representation of the parent and daughter partons. We include the explicit solutions to second order in opacity as supplementary material and present numerical results in a realistic strongly-interacting medium produced in high center-of-mass energy heavy ion collisions at the Large Hadron Collider. Our numerical simulations show that the second order in opacity corrections can change the energy dependence of the in-medium shower intensity. We further find corrections to the longitudinal and angular distributions of the in-medium splitting kernels that may have important implications for jet substructure phenomenology. *

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Multiple parton scattering in nuclei: Modified Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) evolution for fragmentation functions

Cited by 91 publications

References 56 publications

Initial-state energy loss in cold QCD matter and the Drell-Yan process

Initial-state energy loss in cold QCD matter and the Drell-Yan process

Extracting jet transport coefficient via single hadron and dihadron productions in high-energy heavy-ion collisions

A complete set of in-medium splitting functions to any order in opacity

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