Phenomenological analysis of azimuthal asymmetries in unpolarized semi-inclusive deep inelastic scattering

Barone, Vincenzo; Boglione, M.; Hernandez, J. Osvaldo Gonzalez; Melis, S.

doi:10.1103/physrevd.91.074019

Cited by 24 publications

(59 citation statements)

References 48 publications

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“…At this order, only the Boer-Mulders effect contributes to the cos 2φ asymmetry, since the Cahn effect for the cos 2φ modulation is a twist-4 effect and is 1/Q 2 suppressed. However, at the order of O(1/Q), both the Boer-Mulders and Cahn effects give rise to the cos φ asymmetry [131]:…”

Section: Parameterization In Ref [131]mentioning

confidence: 99%

“…For this reason, the data of cos φ asymmetry were also included in the fit of Ref. [131]. The extraction is performed by using the following parametrization form for the Boer-Mulders functions: …”

Section: Parameterization In Ref [131]mentioning

confidence: 99%

“…[131], two parameters are fixed as α q = β q = 0, that is, Δf q ↑ /p (x) is proportional to f q/p (x). The fitted values of the remaining parameters are given in Tables 1 and 2 of [131] for the HERMES and COMPASS data, respectively. As an example, the best fit curves [131] for cos 2φ asymmetry obtained by fitting the COMPASS data are shown in Fig.…”

Section: Parameterization In Ref [131]mentioning

confidence: 99%

“…In the practical extraction of Ref. [131], two parameters are fixed as α q = β q = 0, that is, Δf q ↑ /p (x) is proportional to f q/p (x). The fitted values of the remaining parameters are given in Tables 1 and 2 of [131] for the HERMES and COMPASS data, respectively.…”

Section: Parameterization In Ref [131]mentioning

confidence: 99%

“…The last decade has seen a considerable number of phenomenological studies [109,[124][125][126][127][128][129][130][131][132] on the unpolarized leptoproduction at EMC, ZEUS, HERMES, JLab, and COMPASS based upon one or more of the three mechanisms. In the analysis of Ref.…”

Section: Phenomenological Analysis On the Cos 2φ Asymmetry In Sidismentioning

confidence: 99%

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Spin physics through unpolarized processes

Lü

2016

Front. Phys.

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This article presents a review of our present understanding of the spin structure of the unpolarized hadron. Particular attention is paid to the quark sector at leading twist, namely, the quark Boer-Mulders function, which describes the transverse polarization of the quark inside an unpolarized hadron. After introducing the operator definition of the Boer-Mulders function, a detailed treatment of different non-perturbative calculations of the Boer-Mulders functions is provided. The phenomenology in Drell-Yan processes and semi-inclusive leptoproduction, including the extraction of the quark and antiquark Boer-Mulders functions from experimental data, is presented comprehensively. Finally, prospects for future theoretical studies and experimental measurements are presented in brief.

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Section: Parameterization In Ref [131]mentioning

confidence: 99%

Section: Parameterization In Ref [131]mentioning

confidence: 99%

Section: Parameterization In Ref [131]mentioning

confidence: 99%

Section: Parameterization In Ref [131]mentioning

confidence: 99%

Section: Phenomenological Analysis On the Cos 2φ Asymmetry In Sidismentioning

confidence: 99%

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Spin physics through unpolarized processes

Lü

2016

Front. Phys.

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Extraction of partonic transverse momentum distributions from semi-inclusive deep-inelastic scattering, Drell-Yan and Z-boson production

Bacchetta

Delcarro

Pisano

et al. 2017

J. High Energ. Phys.

217

239

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We present an extraction of unpolarized partonic transverse momentum distributions (TMDs) from a simultaneous fit of available data measured in semi-inclusive deep-inelastic scattering, Drell-Yan and Z boson production. To connect data at different scales, we use TMD evolution at next-to-leading logarithmic accuracy. The analysis is restricted to the low-transverse-momentum region, with no matching to fixed-order calculations at high transverse momentum. We introduce specific choices to deal with TMD evolution at low scales, of the order of 1 GeV 2 . This could be considered as a first attempt at a global fit of TMDs.

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Semi-inclusive deep-inelastic scattering in Wandzura-Wilczek-type approximation

Bastami

Avakian

Efremov

et al. 2019

J. High Energ. Phys.

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We present the complete cross-section for the production of unpolarized hadrons in semi-inclusive deep-inelastic scattering up to power-suppressed O(1/Q 2) terms in the Wandzura-Wilczek-type approximation, which consists in systematically assuming thatqgq-terms are much smaller thanqq-correlators. We compute all twist-2 and twist-3 structure functions and the corresponding asymmetries, and discuss the applicability of the Wandzura-Wilczek-type approximations on the basis of available data. We make predictions that can be tested by data from COMPASS, HERMES, Jefferson Lab, and the future Electron-Ion Collider. The results of this paper can be readily used for phenomenology and for event generators, and will help to improve the description of semi-inclusive deep-inelastic processes in terms of transverse momentum dependent parton distribution functions and fragmentation functions beyond the leading twist.

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Phenomenological analysis of azimuthal asymmetries in unpolarized semi-inclusive deep inelastic scattering

Cited by 24 publications

References 48 publications

Spin physics through unpolarized processes

Spin physics through unpolarized processes

Extraction of partonic transverse momentum distributions from semi-inclusive deep-inelastic scattering, Drell-Yan and Z-boson production

Semi-inclusive deep-inelastic scattering in Wandzura-Wilczek-type approximation

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