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

Research output: Chapter in Book/Report/Conference proceedingConference 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 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.

Original languageEnglish (US)
Title of host publicationDEEP INELASTIC SCATTERING
Subtitle of host publication13th International Workshop on Deep Inelastic Scattering; DIS 2005
Pages981-984
Number of pages4
DOIs
Publication statusPublished - Oct 6 2005
Event13th International Workshop on Deep Inelastic Scattering; DIS 2005 - Madison, WI, United States
Duration: Apr 27 2005May 1 2005

Publication series

NameAIP Conference Proceedings
Volume792
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other13th International Workshop on Deep Inelastic Scattering; DIS 2005
CountryUnited States
CityMadison, WI
Period4/27/055/1/05

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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