Understanding the role of Cahn and Sivers effects in deep inelastic scattering

M. Anselmino; M. Boglione; U. D'Alesio; A. Kotzinian; F. Murgia; A. Prokudin

doi:10.1063/1.2122202

Understanding the role of Cahn and Sivers effects in deep inelastic scattering

M. Anselmino, M. Boglione, U. D'Alesio, A. Kotzinian, F. Murgia, A. Prokudin

Division of Science (Berks)

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Scopus citations

Abstract

The role of intrinsic k_⊥ in semi-inclusive Deep Inelastic Scattering (SIDIS) processes (lp → lhX) is studied with exact kinematics within QCD parton model at leading order; the dependence of the unpolarized cross section on the azimuthal angle between the leptonic and the hadron production planes (Cahn effect) is compared with data and used to estimate the average values of k_⊥ both in quark distribution and fragmentation functions. The resulting picture is applied to the description of the weighted single spin asymmetry A_UT^sin( _π-_S) recently measured by the HERMES collaboration at DESY; this allows to extract parameters for the quark Sivers functions. The extracted Sivers functions give predictions for the COMPASS measurement of A_UT^sin(_π-_S) in agreement with recent data, while their contribution to HERMES A_UL ^sin_π is computed and found to be small. Predictions for A_UT^sin(_K-_S) for kaon production at HERMES are also given.

Original language	English (US)
Title of host publication	DEEP INELASTIC SCATTERING
Subtitle of host publication	13th International Workshop on Deep Inelastic Scattering; DIS 2005
Pages	981-984
Number of pages	4
DOIs	https://doi.org/10.1063/1.2122202
Publication status	Published - Oct 6 2005
Event	13th International Workshop on Deep Inelastic Scattering; DIS 2005 - Madison, WI, United States Duration: Apr 27 2005 → May 1 2005

Publication series

Name	AIP Conference Proceedings
Volume	792
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Other

Other	13th International Workshop on Deep Inelastic Scattering; DIS 2005
Country	United States
City	Madison, WI
Period	4/27/05 → 5/1/05

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All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

Cite this

Anselmino, M., Boglione, M., D'Alesio, U., Kotzinian, A., Murgia, F., & Prokudin, A. (2005). Understanding the role of Cahn and Sivers effects in deep inelastic scattering. In DEEP INELASTIC SCATTERING: 13th International Workshop on Deep Inelastic Scattering; DIS 2005 (pp. 981-984). (AIP Conference Proceedings; Vol. 792). https://doi.org/10.1063/1.2122202

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title = "Understanding the role of Cahn and Sivers effects in deep inelastic scattering",

abstract = "The role of intrinsic k⊥ in semi-inclusive Deep Inelastic Scattering (SIDIS) processes (lp → lhX) is studied with exact kinematics within QCD parton model at leading order; the dependence of the unpolarized cross section on the azimuthal angle between the leptonic and the hadron production planes (Cahn effect) is compared with data and used to estimate the average values of k⊥ both in quark distribution and fragmentation functions. The resulting picture is applied to the description of the weighted single spin asymmetry AUTsin( π-S) recently measured by the HERMES collaboration at DESY; this allows to extract parameters for the quark Sivers functions. The extracted Sivers functions give predictions for the COMPASS measurement of AUTsin(π-S) in agreement with recent data, while their contribution to HERMES AUL sinπ is computed and found to be small. Predictions for AUTsin(K-S) for kaon production at HERMES are also given.",

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Anselmino, M, Boglione, M, D'Alesio, U, Kotzinian, A, Murgia, F & Prokudin, A 2005, Understanding the role of Cahn and Sivers effects in deep inelastic scattering. in DEEP INELASTIC SCATTERING: 13th International Workshop on Deep Inelastic Scattering; DIS 2005. AIP Conference Proceedings, vol. 792, pp. 981-984, 13th International Workshop on Deep Inelastic Scattering; DIS 2005, Madison, WI, United States, 4/27/05. https://doi.org/10.1063/1.2122202

Understanding the role of Cahn and Sivers effects in deep inelastic scattering. / Anselmino, M.; Boglione, M.; D'Alesio, U.; Kotzinian, A.; Murgia, F.; Prokudin, A.

DEEP INELASTIC SCATTERING: 13th International Workshop on Deep Inelastic Scattering; DIS 2005. 2005. p. 981-984 (AIP Conference Proceedings; Vol. 792).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AU - Anselmino, M.

AU - Boglione, M.

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AU - Murgia, F.

AU - Prokudin, A.

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N2 - The role of intrinsic k⊥ in semi-inclusive Deep Inelastic Scattering (SIDIS) processes (lp → lhX) is studied with exact kinematics within QCD parton model at leading order; the dependence of the unpolarized cross section on the azimuthal angle between the leptonic and the hadron production planes (Cahn effect) is compared with data and used to estimate the average values of k⊥ both in quark distribution and fragmentation functions. The resulting picture is applied to the description of the weighted single spin asymmetry AUTsin( π-S) recently measured by the HERMES collaboration at DESY; this allows to extract parameters for the quark Sivers functions. The extracted Sivers functions give predictions for the COMPASS measurement of AUTsin(π-S) in agreement with recent data, while their contribution to HERMES AUL sinπ is computed and found to be small. Predictions for AUTsin(K-S) for kaon production at HERMES are also given.

AB - The role of intrinsic k⊥ in semi-inclusive Deep Inelastic Scattering (SIDIS) processes (lp → lhX) is studied with exact kinematics within QCD parton model at leading order; the dependence of the unpolarized cross section on the azimuthal angle between the leptonic and the hadron production planes (Cahn effect) is compared with data and used to estimate the average values of k⊥ both in quark distribution and fragmentation functions. The resulting picture is applied to the description of the weighted single spin asymmetry AUTsin( π-S) recently measured by the HERMES collaboration at DESY; this allows to extract parameters for the quark Sivers functions. The extracted Sivers functions give predictions for the COMPASS measurement of AUTsin(π-S) in agreement with recent data, while their contribution to HERMES AUL sinπ is computed and found to be small. Predictions for AUTsin(K-S) for kaon production at HERMES are also given.

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Access to Document

10.1063/1.2122202