Testing various polarized parton distributions at RHIC

Soffer, Jacques; Virey, J. M.

doi:10.1016/s0550-3213(97)00669-x

Cited by 23 publications

(30 citation statements)

References 29 publications

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“…For example, parity-violating single-and doublespin asymmetries for W production in the reactions − → p p → W ± X and − → p − → p → W ± X respectively, are given by [22,23] …”

Section: The Statistical Model Makes Concrete Predictions For Variousmentioning

confidence: 99%

“…3. Also shown for comparison are results reported in [23]. These are based on the parameterizations of polarized PDFs given in [2,3,24].…”

Section: The Statistical Model Makes Concrete Predictions For Variousmentioning

confidence: 99%

“…Solid curves: present model. Other curves: Long-dashed [24], short-dashed [2], dotted and dot-dashed [3] for two separate parameterizations -as reported in [23].…”

Section: The Statistical Model Makes Concrete Predictions For Variousmentioning

confidence: 99%

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Is the polarized antiquark sea in the nucleon flavor symmetric?

Bhalerao¹

2001

Nuclear Physics A

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We show that the model which naturally explains theū =d asymmetry in the nucleon and is in quantitative agreement with the Gottfried sum rule data, also predicts that in the proton ∆ū > 0 > ∆s > ∆d and ∆ū−∆d >d−ū > 0.At the input scale, these results can be derived even analytically. Thus the violation of the flavor symmetry is more serious in the polarized case than in the unpolarized case. In contrast, many recent analyses of the polarized data have made a simplifying assumption that all the three ∆q's have the same sign and magnitude. We point out the need to redo these analyses, allowing for the alternate scenario as described above. We present predictions of the model for the W − asymmetry in polarized pp scattering, which can be tested at RHIC; these are quite different from those available in the literature.PACS numbers: 14.20. Dh, 13.60.Hb, 13.88.+e Keywords: polarized deep inelastic scattering, polarized pp collisions, polarized parton densities, antiquark flavor asymmetry, spin asymmetries, statistical model of the nucleon 1

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Section: The Statistical Model Makes Concrete Predictions For Variousmentioning

confidence: 99%

“…3. Also shown for comparison are results reported in [23]. These are based on the parameterizations of polarized PDFs given in [2,3,24].…”

Section: The Statistical Model Makes Concrete Predictions For Variousmentioning

confidence: 99%

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Is the polarized antiquark sea in the nucleon flavor symmetric?

Bhalerao¹

2001

Nuclear Physics A

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“…The RHIC spin programme is expected to start operation three years from now and will offer new information on the polarized parton distributions from a variety of observables accessible in hadron-hadron collisions [4]. A recent overview of the physics prospects of the RHIC spin programme has been presented in [5], where estimates of the expected asymmetries and anticipated errors for the most important processes can be found. At RHIC it will be possible to access the polarized quark distributions from the study of double and single spin asymmetries in the production of V = W ± , Z 0 vector bosons.…”

Section: Introductionmentioning

confidence: 99%

QCD corrections to double and single spin asymmetries in vector boson production at polarized hadron colliders

Gehrmann¹

1998

Nuclear Physics B

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The production of W ± and Z 0 bosons in collisions of longitudinally polarized protons allows to access various combinations of the polarized quark distributions from the study of double and single spin asymmetries. We compute the O(α s ) corrections to these asymmetries as function of the vector boson rapidity y in the hadron-hadron centre-of-mass frame. Detailed studies of the numerical impact of the next-to-leading order corrections are presented. The theoretical uncertainties of an extraction of polarized quark distributions from future vector boson production data are investigated in detail.

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“…2. These cross sections are partly more sensitive to the flavor structure of the light sea, although at far larger scales µ F ∼ M W ± ,Z 0 , and may discern its polarized flavor 7 structure not only in doubly polarized collisions but also in the single polarization mode [25]- [27] where only one beam is polarized. Possible benefits of this latter mode are the expected lower statistical errors…”

Section: W ± and Z 0 Productionmentioning

confidence: 99%

On the determination of the polarized sea distributions of the nucleon

Glück¹,

Hartl²,

Reya³

2001

Eur. Phys. J. C

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The possibilities to determine the flavor structure of the polarized sea (antiquark) distributions of the nucleon via vector boson (γ * , W ± , Z 0 ) production at high energy polarized hadron-hadron colliders, such as the Relativistic Heavy-Ion Collider (RHIC), are studied in detail. In particular the perturbative stability of the expected asymmetries in two representative models for the (un)broken flavor structure are investigated by confronting perturbative QCD leading order predictions of the expected asymmetries with their next-to-leading order counterparts.

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Testing various polarized parton distributions at RHIC

Cited by 23 publications

References 29 publications

Is the polarized antiquark sea in the nucleon flavor symmetric?

Is the polarized antiquark sea in the nucleon flavor symmetric?

QCD corrections to double and single spin asymmetries in vector boson production at polarized hadron colliders

On the determination of the polarized sea distributions of the nucleon

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