Nuclear effects in the Drell-Yan process at very high energies

Kopeliovich, B. Z.; Raufeisen, J.; Tarasov, A.V.; Johnson, Mikkel B.

doi:10.1103/physrevc.67.014903

Cited by 90 publications

(153 citation statements)

References 68 publications

Supporting

Mentioning

149

Contrasting

Order By: Relevance

“…(20). We can attempt some educated guess based on simplifying hypothesis and on the general properties of known parton distributions and of hadron-hadron phenomenology.…”

Section: Discussion and Perspectivesmentioning

confidence: 99%

“…[8,9,10,11] demand a description of their internal structure in terms of elementary degrees of freedom (quarks and gluons) in order to correctly describe their propagation and to study effects that can modify high-energy azimuthal asymmetries at RHIC or LHC (see, for example, Refs. [19,20]). Here, we will consider Drell-Yan processes at lower energies of interest for the foreseen HESR ring at GSI, where collisions of (polarized) protons and antiprotons with energy in the range 10 ÷ 30 GeV will be studied [21,22,23,24,25,26,27].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Azimuthal asymmetries in unpolarized Drell–Yan events on nuclear targets

Bianconi

Radici

2005

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

We show that for Drell-Yan events by unpolarized hadronic projectiles and nuclear targets, azimuthal asymmetries can arise from the nuclear distortion of the hadronic projectile wave function, typically a spin-orbit effect occurring on the nuclear surface. The asymmetry depends on quantities that enter also the spin asymmetry in the corresponding Drell-Yan event on polarized free nucleonic targets. Hence, this study can be of help in exploring the spin structure of the nucleon, in particular the transverse spin distribution of partons inside the proton. All arguments can be extended also to antinucleon projectiles and, consequently, apply to possible future measurements involving nuclear targets at the foreseen HESR ring at GSI.

show abstract

“…(20). We can attempt some educated guess based on simplifying hypothesis and on the general properties of known parton distributions and of hadron-hadron phenomenology.…”

Section: Discussion and Perspectivesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Azimuthal asymmetries in unpolarized Drell–Yan events on nuclear targets

Bianconi

Radici

2005

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

show abstract

“…Such result can be verified in the Ref. [6], where an analysis was performed for the dilepton production at RHIC and LHC energies in the color-dipole formalism, however, there the ratio was defined with a different normalization.…”

Section: A Saturation Effects In Dilepton Productionmentioning

confidence: 67%

“…The unitarity corrections, considering the dipole approach, are investigated in the proton-proton collisions, since the effect of perturbative corrections should be more evident in this reaction (the nuclear effects present in nuclear collisions should mask the unitiarty corrections), however, the dilepton production was shown to be a sensitive probe of the perturbative shadowing and saturation dynamics in all possibilities of reactions [2][3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

High density QCD through eletromagnetic probes

Betemps

2007

Braz. J. Phys.

View full text Add to dashboard Cite

In this work we investigate the high density QCD system through the dilepton production. First, the dilepton production in the color dipole approach is investigated, studing perturbative unitarity corrections to the dipole cross section and its consequence in the transverse momentum distribution of the dileptons at RHIC and LHC energies. Second, the dilepton production in the context of the Color Glass Condensate is investigated. The transverse momentum distribution and the rapidity distribution are investigated to dilepton production at RHIC and LHC energies in this framework.

show abstract

“…An increase of δ p 2 T with energy is expected in the dipole approach [13,14] T from the color filtering mechanism of Ref. [9].…”

mentioning

confidence: 76%

Heavy quark production and gluon shadowing at RHIC and LHC

Raufeisen¹

2004

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

Abstract. I review the color dipole formulation of heavy quark production in the light of recent RHIC data. Since charm and bottom production directly probe the gluon density, these processes allow one to study shadowing and parton saturation at RHIC and LHC. The dipole approach provides a convenient framework to calculate these nuclear effects. I present numerical results for open charm and bottom production in proton-proton and proton-nucleus collisions and discuss transverse momentum broadening of heavy quarkonia.At high center of mass energies √ s, the cross section for any reaction a + N → {b, c, . . .}X can be expressed as convolution of the light-cone (LC) wavefunction for the transition a → {b, c, . . .} and the cross section for scattering the color neutral {anti−a, b, c . . .}-system on the target nucleon N . In the case of heavy quark production this means that the Feynman graphs in Fig. 1 can be written in the form [1, 2],where σ qqG is the cross section for scattering a color neutral quark-antiquark-gluon system on a nucleon [2],Here α is the light-cone momentum fraction carried by the heavy quark Q, and α = 1 − α is the momentum fraction of theQ. The flavor independent dipole cross section σ qq (ρ) is a nonperturbative quantity and has to be determined from experimental data. It depends on the transverse separation ρ between quark and antiquark. Note that the dipole approach is formulated in the target rest frame with ¡ É É ¡¡ Figure 1. The three lowest order graphs contributing to heavy quark production in the dipole approach. These graphs correspond to the gluon-gluon fusion mechanism of heavy quark production in the parton model.

show abstract

Nuclear effects in the Drell-Yan process at very high energies

Cited by 90 publications

References 68 publications

Azimuthal asymmetries in unpolarized Drell–Yan events on nuclear targets

Azimuthal asymmetries in unpolarized Drell–Yan events on nuclear targets

High density QCD through eletromagnetic probes

Heavy quark production and gluon shadowing at RHIC and LHC

Contact Info

Product

Resources

About