Azimuthal asymmetries in unpolarized Drell-Yan processes and the Boer-Mulders distributions of antiquarks

Barone, Vincenzo; Melis, S.; Prokudin, Alexei

doi:10.1103/physrevd.82.114025

Cited by 42 publications

(60 citation statements)

References 49 publications

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“…Even if to a lesser extent some information on the Boer-Mulders function [54] has been also gathered [55][56][57][58][59][60][61]. On the other hand, up to now, very little is known on gluon TMDs.…”

Section: Jhep09(2015)119mentioning

confidence: 99%

Towards a first estimate of the gluon Sivers function from A N data in pp collisions at RHIC

D’Alesio

Murgia

Pisano

2015

J. High Energ. Phys.

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Within a generalized parton model approach, with inclusion of spin and intrinsic transverse momentum effects, we show how the latest, highly precise, midrapidity data on the transverse single spin asymmetry measured in pp → π 0 X by the PHENIX Collaboration at RHIC [1], can be used to get a first estimate on the still poorly known gluon Sivers distribution. To this end we also adopt the present information on the quark Sivers functions, as extracted from semi-inclusive deeply inelastic scattering data. This analysis updates a previous study by some of us where a first bound on this distribution was obtained [2].

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Section: Jhep09(2015)119mentioning

confidence: 99%

Towards a first estimate of the gluon Sivers function from A N data in pp collisions at RHIC

D’Alesio

Murgia

Pisano

2015

J. High Energ. Phys.

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“…For the unpolarized distributions we use the GRV98 fit [71], which were also used by Refs. [64][65][66]69] for the other aforementioned non-perturbative inputs that enter. All parton correlation functions are evaluated at the scale q T with leading order evolution of the collinear functions.…”

Section: Calculation Of the Unpolarized Quark-gluon-quark Correlator mentioning

confidence: 99%

“…4-6, in general the chiral-odd piece is negligible. We have checked that this is a robust statement by changing parameters in both the Boer-Mulders function from [64] (including looking at both Fit 1 and Fit 2) and the transversity function from [69] within their error ranges. In all cases, we found the chiral-odd piece is roughly four orders of magnitude smaller than the total asymmetry (in the x F -range where A γ N is nonzero).…”

Section: Calculation Of the Unpolarized Quark-gluon-quark Correlator mentioning

confidence: 99%

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Transverse single-spin asymmetries inp↑p→γXfrom quark-gluon-quark correlations in the proton

et al. 2015

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We analyze the transverse single-spin asymmetry in direct photon production from proton-proton collisions, denoted A γ N , within collinear twist-3 factorization. We provide a calculation of the contribution due to quark-gluon-quark correlations in the unpolarized proton as well as summarize previous studies on those effects in the polarized proton. Both soft-gluon poles and soft-fermion poles are considered. From this complete result we then estimate A γ N , including error bands due to uncertainties in the non-perturbative inputs, at kinematics relevant for planned measurements of this observable at the Relativistic Heavy Ion Collider. We find A γ N can allow for a "clean" extraction of the Qiu-Sterman function, which could lead to a definitive solution to the so-called "sign mismatch" crisis. Since we use the Sivers function extracted from semi-inclusive deep-inelastic scattering to develop our input for the Qiu-Sterman function, this reaction can also make a statement about the process dependence of the Sivers function.

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“…As a result, they are less known than the chiral-even distribution functions. Anyway, there are some efforts to extract transversity from SIDIS data [46,47], and Boer-Mulders function from SIDIS and Drell-Yan data [48][49][50][51]. For h ⊥ 1T and h ⊥ 1L , there are extensive model calculations [52][53][54][55][56][57][58][59][60] and some proposals to measure them in SIDIS and pp Drell-Yan processes.…”

Section: Systematics Of Leading-twist Chiral-odd Distributions Anmentioning

confidence: 99%

Azimuthal asymmetries in single polarized proton-proton Drell-Yan processes

Lü

Zhu

2011

Phys. Rev. D

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We study the azimuthal asymmetries in proton-proton Drell-Yan processes with one incident proton being transversely or longitudinally polarized. We consider particularly the asymmetries contributed by the leading-twist chiral-odd quark distributions. We analyze the asymmetries with sin(2φ + φS) and sin(2φ − φS) modulations in transverse single polarized p ↑ p Drell-Yan and sin 2φ asymmetries in longitudinal single polarized p → p Drell-Yan at the Relativistic Heavy Ion Collider, the Japan Proton Accelerator Research Complex, E906 (Fermi Lab), and the Nuclotron-based Ion Collider Facility (Joint Institute for Nuclear Research). We show that the measurements of the asymmetries in those facilities can provide valuable information of the chiral-odd structure of the nucleon both in the valence and sea regions.

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Azimuthal asymmetries in unpolarized Drell-Yan processes and the Boer-Mulders distributions of antiquarks

Cited by 42 publications

References 49 publications

Towards a first estimate of the gluon Sivers function from A N data in pp collisions at RHIC

Towards a first estimate of the gluon Sivers function from A N data in pp collisions at RHIC

Transverse single-spin asymmetries inp↑p→γXfrom quark-gluon-quark correlations in the proton

Azimuthal asymmetries in single polarized proton-proton Drell-Yan processes

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