QCD asymmetry and polarized hadron structure function measurement

Ефремов, А. В.; Teryaev, Oleg

doi:10.1016/0370-2693(85)90999-2

Cited by 343 publications

(288 citation statements)

References 3 publications

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“…In the first step one performs a collinear factorization in the impact space with twist-3 matrix elements introduced in [39][40][41][42][43]. Then one adds one-loop correction.…”

Section: Jhep02(2014)100mentioning

confidence: 99%

QCD corrections of all structure functions in transverse momentum dependent factorization for Drell-Yan processes

Zhang

2014

J. High Energ. Phys.

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Abstract:We study the one-loop correction in Transverse-Momentum-Dependent(TMD) factorization for Drell-Yan processes at small transverse momentum of the lepton pair. We adopt the so-called subtractive approach, in which one can systematically construct contributions for subtracting long-distance effects represented by diagrams. The perturbative parts are obtained after the subtraction. We find that the perturbative coefficients of all structure functions in TMD factorization at leading twist are the same. The perturbative parts can also be studied with scattering of partons instead of hadrons. In this way, the factorization of many structure functions can only be examined by studying the scattering of multi-parton states, where there are many diagrams. These diagrams have no similarities to those treated in the subtractive approach. As an example, we use existing results of one structure function responsible for Single-Spin-Asymmetry, to show that these diagrams in the scattering of multi-parton states are equivalent to those treated in the subtractive approach after using Ward identity.

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“…In the first step one performs a collinear factorization in the impact space with twist-3 matrix elements introduced in [39][40][41][42][43]. Then one adds one-loop correction.…”

Section: Jhep02(2014)100mentioning

confidence: 99%

QCD corrections of all structure functions in transverse momentum dependent factorization for Drell-Yan processes

Zhang

2014

J. High Energ. Phys.

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“…So that, after combining with the twoparticle correlator contributions, one gets the gauge-invariant expressions for the physical amplitudes or, in the case of lepton-hadron processes, for the corresponding hadron tensors [7]. This scheme was originally developed in the case of the particular inclusive processes with transverse polarized hadrons, like structure function g 2 in DIS [7] and single spin asymmetry (SSA) [8] due to the soft quark (fermionic poles [9]). Also, the QCD gauge invariance of the so-called gluonic poles contributions [10] has been a subject of studies a e-mail: anikin@theor.jinr.ru b e-mail: teryaev@theor.jinr.ru in [11] where the methods that are used rely on the Wilson exponentials [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

New contributions to gluon poles in direct photon production

Anikin¹,

Teryaev²

2015

Eur. Phys. J. C

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We consider the direct photon production in a two hadron collision with one of the hadrons transversely polarized. By using the contour gauge for gluon fields, we find that there are new twist-3 terms present in the hadron tensor of the considered process in addition to the standard twist-3 terms. In this work, we demonstrate that the significance of these new terms are twofold: first, they are crucial to both the QED and the QCD gauge invariance and, second, their contributions to the hadron tensor are at least the same as those from the standard ones. We also study the resulting effects which are responsible for the universality breaking of the corresponding twist-3 parton distributions.

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“…[5][6][7][8][9] and phenomenologically developed in refs. [10][11][12][13], is based on collinear higher-twist parton correlators.…”

Section: Introduction and Formalismmentioning

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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QCD asymmetry and polarized hadron structure function measurement

Cited by 343 publications

References 3 publications

QCD corrections of all structure functions in transverse momentum dependent factorization for Drell-Yan processes

QCD corrections of all structure functions in transverse momentum dependent factorization for Drell-Yan processes

New contributions to gluon poles in direct photon production

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

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