Nuclear modification of J/Psi and Drell-Yan production at the E906/SeaQuest experiment

Ayuso, C.

doi:10.2172/1637630

Cited by 4 publications

(6 citation statements)

References 22 publications

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“…Using the deuteron target reduces the potential, albeit small, isospin dependence of the ratios. The calculations shown in this section are all in the x F and p T bins defined by SeaQuest [33]. The calculated points shown in the figures are placed at the arithmetic center of the bin rather than a cross-section weighted center.…”

Section: Resultsmentioning

confidence: 99%

“…Its J/ψ acceptance is in the region 0.4 < x F < 0.95 and p T < 2.3 GeV. They have measured the x F and p T dependence of J/ψ production in p + p, p + d, p + C, p + Fe and p + W interactions [33]. A similar two-component model is employed to make predictions for these measurements, at energies and with kinematic acceptance favorable to intrinsic charm, in this work.…”

Section: Introductionmentioning

confidence: 99%

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Limits on Intrinsic Charm Production from the SeaQuest Experiment

Vogt

2021

Preprint

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Background: A nonperturbative charm production contribution, known as intrinsic charm, has long been speculated but has never been satisfactorily proven. The SeaQuest experiment at FNAL is in an ideal kinematic region to provide evidence of J/ψ production by intrinsic charm. Purpose: J/ψ production in the SeaQuest kinematics is calculated with a combination of perturbative QCD and intrinsic charm to see whether the SeaQuest data can put limits on an intrinsic charm contribution. Methods: J/ψ production in perturbative QCD is calculated to next-to-leading order in the cross section. Cold nuclear matter effects include nuclear modification of the parton densities, absorption by nucleons, and pT broadening by multiple scattering. The J/ψ contribution from intrinsic charm is calculated assuming production from a |uudcc Fock state. Results: The nuclear modification factor, RpA, is calculated as a function of xF and pT for p+C, p+Fe, and p+W interactions relative to p+d. Conclusions: The SeaQuest kinematic acceptance is ideal for testing the limits on intrinsic charm in the proton.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Limits on Intrinsic Charm Production from the SeaQuest Experiment

Vogt

2021

Preprint

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“…The calculations are all in the and bins defined by SeaQuest [11]. The calculated points shown in the figures are placed at the arithmetic center of the bin rather than a cross-section weighted center.…”

Section: Pos(charm2020)038mentioning

confidence: 99%

“…Its / acceptance is in the region 0.4 < < 0.95 and < 2.3 GeV. They have measured the and dependence of / production in + , + d, + C, + Fe and + W interactions [11].…”

Section: Introductionmentioning

confidence: 99%

Constraints on Intrinsic Charm from the SeaQuest Experiment

Vogt¹

2021

Proceedings of 10th International Workshop on Charm Physics — PoS(CHARM2020)

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A nonperturbative charm production contribution, known as intrinsic charm, has long been speculated but has never been satisfactorily proven. The SeaQuest experiment at FNAL is in an ideal kinematic region to provide evidence of / production by intrinsic charm. Here, / production in the SeaQuest kinematics is calculated with a combination of perturbative QCD and intrinsic charm to see whether the SeaQuest data can put limits on an intrinsic charm contribution. / production in perturbative QCD is calculated to next-to-leading order in the cross section. Cold nuclear matter effects included in this component are nuclear modification of the parton densities, absorption by nucleons, and broadening by multiple scattering. The / contribution from intrinsic charm is calculated assuming production from a | ⟩ Fock state. The nuclear modification factor, , is calculated as a function of and for + C, + Fe, and + W interactions relative to + d. It is shown that the SeaQuest kinematic acceptance is ideal for setting limits on intrinsic charm in the proton.

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“…Heavy quark production, both of charmonium, J/ψ, and charm mesons such as D and D, has been studied in a variety of environments, from more elementary collisions such as p + p and p + p, to protons on nuclei, p + A, and nucleus-nucleus collisions, A + A. Many earlier studies of J/ψ production in p + A collisions were made in fixed-target configurations [1][2][3][4][5][6][7][8][9][10][11]. More recently production has predominantly been studied at hadron and nuclear colliders, in particular at the Relativistic Heavy-Ion Collider at Brookhaven [12,13] and the Large Hadron Collider at CERN [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Energy dependence of intrinsic charm production: Determining the best energy for observation

Vogt

2022

Phys. Rev. C

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Background: A nonperturbative charm production contribution, known as intrinsic charm, was predicted in the early 1980s. Recent results have provided new evidence for its existence but further confirmation is needed. Purpose: J/ψ and D meson production are calculated with a combination of perturbative QCD and intrinsic charm to determine the best energy range to study intrinsic charm production. Methods: J/ψ and D meson production are calculated in perturbative QCD to next-to-leading order in the cross section. Cold nuclear matter effects, including nuclear modification of the parton densities and pT broadening by multiple scattering are taken into account in the production of both; absorption by nucleons is also included for the J/ψ. Contributions from intrinsic charm are calculated assuming production from a |uudcc Fock state. Results: The J/ψ and D meson rapidity and pT distributions are calculated as a function of rapidity and transverse momentum pT over a wide range of center-of-mass energies with and without intrinsic charm in p + p collisions. The nuclear modification factor, RpA, is also calculated for p + Pb interactions at appropriate energies. Previous fixed-target data as a function of Feynman x, xF , are also compared to calculations within the approach. Good agreement with the data is found when intrinsic charm is included. Conclusions: The intrinsic charm signal may be largest at midrapidity for future low energy fixed target experiments such as the proposed NA60+.

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Nuclear modification of J/Psi and Drell-Yan production at the E906/SeaQuest experiment

Cited by 4 publications

References 22 publications

Limits on Intrinsic Charm Production from the SeaQuest Experiment

Limits on Intrinsic Charm Production from the SeaQuest Experiment

Constraints on Intrinsic Charm from the SeaQuest Experiment

Energy dependence of intrinsic charm production: Determining the best energy for observation

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