Sivers asymmetry for the proton and the neutron

Scopetta, S.; Courtoy, Aurore; Fratini, F.; Vento, V.

doi:10.1063/1.3013030

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Sivers asymmetry for the proton and the neutron

Scopetta, S.; Courtoy, Aurore; Fratini, F. et al.

2008 • In AIP Conference Proceedings, 1056, p. 114-121

Peer Reviewed verified by ORBi

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https://hdl.handle.net/2268/127166

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10.1063/1.3013030

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Keywords :

DIS; Neutron structure; Transversity

Abstract :

[en] A formalism is presented to evaluate the Sivers function in constituent quark models. A non-relativistic reduction of the scheme is performed and applied to the Isgur-Karl model. The results obtained are consistent with a sizable Sivers effect and the signs for the u and d flavor contributions turn out to be opposite. The Burkardt Sum Rule is fulfilled to a large extent. After the estimate of the QCD evolution of the results from the momentum scale of the model to the experimental one, a reasonable agreement with the available data is obtained. A calculation of nuclear effects in the extraction of neutron single spin asymmetries in semi-inclusive deep inelastic scattering off 3He is also described. In the kinematics of forth-coming experiments at JLab, it is found that the nuclear effects arising within an Impulse Approximation approach are under control. © American Institute of Physics.

Disciplines :

Physics

Author, co-author :

Scopetta, S.; Dipartimento di Fisica, Università degli Studi di Perugia, via A. Pascoli, 06100 Perugia, Italy, INFN, Sezione di Perugia, via A. Pascoli, 06100 Perugia, Italy

Courtoy, Aurore ; Departament de Fisica Teòrica, Universitat de València, Consejo Superior de Investigaciones Cientificas, 46100 Burjassot (València), Spain

Fratini, F.; Dipartimento di Fisica, Università degli Studi di Perugia, via A. Pascoli, 06100 Perugia, Italy

Vento, V.; Departament de Fisica Teòrica, Universitat de València, Consejo Superior de Investigaciones Cientificas, 46100 Burjassot (València), Spain, TH-Division, PH Department, CERN, CH-1211 Genève 23, Switzerland

Language :

English

Title :

Sivers asymmetry for the proton and the neutron

Publication date :

2008

Event name :

6th International Conference on Perspectives in Hadronic Physics

Event date :

12 May 2008 through 16 May 2008

Audience :

International

Journal title :

AIP Conference Proceedings

ISSN :

0094-243X

eISSN :

1551-7616

Publisher :

American Institute of Physics, New York, United States - New York

Volume :

1056

Pages :

114-121

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://inspirehep.net/record/790691?ln=en

Funders :

INFN - National Institute for Nuclear Physics
CICYT - Consejo Interinstitucional de Ciencia y Tecnología
Generalitat Valenciana [ES]
CE - Commission Européenne [BE]

Commentary :

9780735405868

Available on ORBi :

since 11 July 2012

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