Transverse single spin asymmetry in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mo>+</mml:mo><mml:msup><mml:mi>p</mml:mi><mml:mo stretchy="false">↑</mml:mo></mml:msup><mml:mo stretchy="false">→</mml:mo><mml:mi>D</mml:mi><mml:mo>+</mml:mo><mml:mi>X</mml:mi></mml:math>

Godbole, Rohini M.; Kaushik, Abhiram; Misra, Anuradha

doi:10.1103/physrevd.94.114022

Cited by 19 publications

(20 citation statements)

References 30 publications

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“…which has been already analyzed within both the GPM [34,69] and the twist-three frameworks [33,70]. As already discussed in Ref.…”

Section: Single-spin Asymmetries Inmentioning

confidence: 93%

Probing the gluon Sivers function in p↑p→J/ψ X and
D’Alesio
¹
,
Murgia
²
,
Pisano
³

et al. 2017
Phys. Rev. D
88
5
123
0
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We present a study of transverse single-spin asymmetries (SSAs) in p ↑ p → J/ψ X and p ↑ p → DX within the framework of the generalized parton model (GPM), which includes both spin and transverse momentum effects, and show how they can provide useful information on the still almost unknown gluon Sivers function. Moreover, by adopting a modified version of this model, named color gauge invariant (CGI) GPM, we analyze the impact of the initial-and final-state interactions on our predictions. As a consequence, we find that these two processes are sensitive to different gluon Sivers functions, which can be expressed as linear combinations of two distinct, universal gluon distributions. We therefore define proper observables which could allow for a separate extraction of these two independent Sivers functions. At the same time, we show how it would be possible to discriminate between the GPM and the CGI-GPM approaches by comparing the corresponding estimates of SSAs with present and future experimental results at RHIC.

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“…which has been already analyzed within both the GPM [34,69] and the twist-three frameworks [33,70]. As already discussed in Ref.…”

Section: Single-spin Asymmetries Inmentioning

confidence: 93%

Probing the gluon Sivers function in p↑p→J/ψ X and
D’Alesio
¹
,
Murgia
²
,
Pisano
³

et al. 2017
Phys. Rev. D
88
5
123
0
View full text Add to dashboard Cite

show abstract

“…Here, we use a phenomenological approach referred to in literature as the Generalized Parton Model (GPM), which has been used to estimate SSAs in several processes like 24,32,35], pp ↑ → γ + jet + X [23,26] and pp ↑ → π + X [9] for which TMD factorization has not yet been established. A rigorous treatment will require inclusion of intrinsic transverse momentum effects through a consideration of higher twist effects.…”

Section: Formalismmentioning

confidence: 99%

“…We will call these BV parameters in the following. In our recent work on TSSA in D-meson production [35], we have used the directly fitted GSF parameters of Ref. [33] and have compared the estimates using these with the results obtained using BV parameters.…”

Section: Introductionmentioning

confidence: 99%

Transverse single spin asymmetry in p+p↑→J/ψ+X

Godbole¹,

Kaushik²,

Sonawane³

et al. 2017

Phys. Rev. D

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We present estimates of transverse single spin asymmetry (TSSA) in p + p ↑ → J/ψ + X within the colour evaporation model of charmonium production in a generalized parton model (GPM) framework, using the recently obtained best fit parameters for the gluon Sivers function (GSF) extracted from PHENIX data on TSSA in p+p ↑ → π 0 +X at midrapidity. We calculate asymmetry at √ s = 200 GeV, and compare the results with PHENIX data on TSSA in the process p + p ↑ → J/ψ+X. We also present estimates for asymmetry at √ s = 115 GeV corresponding to the proposed fixed target experiment AFTER@LHC and at √ s = 500 GeV corresponding to the higher RHIC energy. Finally, we investigate the effect of the transverse momentum dependent (TMD) evolution of the densities involved, on the asymmetry.

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“…Other approaches to describe the single transverse spin asymmetries have also been applied, e.g. for η c,b production using the twist-3 approach [60] or for D-meson production using the so-called generalized parton model approach [61].…”

Section: Gluon Sivers Effect At Small Xmentioning

confidence: 99%

Gluon TMDs in Quarkonium Production

Boer

2017

Few-Body Syst

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Quarkonium production offers good possibilities to study gluon TMDs. In this proceedings contribution this topic is explored for the linearly polarized gluons inside unpolarized hadrons and unpolarized gluons inside transversely polarized hadrons. It is argued that χ b0/2 and η b production at LHC are best to study the effects of linearly polarized gluons in hadronic collisions, by means of angular independent ratios of ratios of cross sections. This can be directly compared to cos 2φ asymmetries in heavy quark pair and dijet production in DIS at a future high-energy Electron-Ion Collider (EIC), which probe the same TMDs. In the small-x limit this corresponds to the Weizsäcker-Williams (WW) gluon distributions, which should show a change in behavior for transverse momenta around the saturation scale. Together with investigations of the dipole (DP) gluon distributions, this can provide valuable information about the polarization of the Color Glass Condensate if sufficiently small x-values are reached. Quarkonia can also be useful in the study of single transverse spin asymmetries. For transversely polarized hadrons the gluon distribution can be asymmetric, which is referred to as the Sivers effect. It leads to single spin asymmetries in for instance J/ψ (pair) production at AFTER@LHC, which probe the WW or f -type gluon Sivers TMD. It allows for a test of a sign-change relation w.r.t. the gluon Sivers TMD probed at an EIC in open heavy quark pair production. Single spin asymmetries in backward inclusive C-odd quarkonium production, such as J/ψ production, may offer probes of the DP or d-type gluon Sivers TMD at small x-values in the polarized proton, which in that limit corresponds to a correlator of a single Wilson loop, describing the spin-dependent odderon.

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Transverse single spin asymmetry inp+p↑→D+X

Cited by 19 publications

References 30 publications

Probing the gluon Sivers function in p↑p→J/ψ X and
D’Alesio
¹
,
Murgia
²
,
Pisano
³

et al. 2017
Phys. Rev. D
88
5
123
0
View full text Add to dashboard Cite

Probing the gluon Sivers function in p↑p→J/ψ X and
D’Alesio
¹
,
Murgia
²
,
Pisano
³

et al. 2017
Phys. Rev. D
88
5
123
0
View full text Add to dashboard Cite

Transverse single spin asymmetry in p+p↑→J/ψ+X

Gluon TMDs in Quarkonium Production

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Transverse single spin asymmetry inp+p↑→D+X

Cited by 19 publications

References 30 publications

Probing the gluon Sivers function in p↑p→J/ψ X and D’Alesio1, Murgia2, Pisano3 et al. 2017Phys. Rev. D8851230View full textAdd to dashboardCite

Probing the gluon Sivers function in p↑p→J/ψ X and D’Alesio1, Murgia2, Pisano3 et al. 2017Phys. Rev. D8851230View full textAdd to dashboardCite

Transverse single spin asymmetry in p+p↑→J/ψ+X

Gluon TMDs in Quarkonium Production

Contact Info

Product

Resources

About

Probing the gluon Sivers function in p↑p→J/ψ X and
D’Alesio
¹
,
Murgia
²
,
Pisano
³

et al. 2017
Phys. Rev. D
88
5
123
0
View full text Add to dashboard Cite

Probing the gluon Sivers function in p↑p→J/ψ X and
D’Alesio
¹
,
Murgia
²
,
Pisano
³

et al. 2017
Phys. Rev. D
88
5
123
0
View full text Add to dashboard Cite