Analyzing the Boer-Mulders function within different quark models

[en] A general formalism for the evaluation of time-reversal odd parton distributions is applied here to calculate the Boer-Mulders function. The same formalism when applied to evaluate the Sivers function led to results which fulfill the Burkardt sum rule quite well. The calculation here has been performed for two different models of proton structure: a constituent quark model and the MIT bag model. In the latter case, important differences are found with respect to a previous evaluation in the same framework, a feature already encountered in the calculation of the Sivers function. The results obtained are consistent with the present wisdom, i.e., the contributions for the u and d flavors turn out to have the same sign, following the pattern suggested analyzing the model-independent features of the impact parameter dependent generalized parton distributions. It is therefore confirmed that the present approach is suitable for the analysis of time-reversal odd distribution functions. A critical comparison between the outcomes of the two models, as well as between the results of the calculations for the Sivers and Boer-Mulders functions, is also carried out. © 2009 The American Physical Society.

Disciplines :

Physics

Author, co-author :

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

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

Vento, V.; Departament de Fisica Teòrica, Universitat de València, Consejo Superior de Investigaciones Científicas, 46100 Burjassot (València), Spain

Language :

English

Title :

Analyzing the Boer-Mulders function within different quark models

Publication date :

2009

Journal title :

Physical Review. D, Particles, Fields, Gravitation, and Cosmology

ISSN :

1550-7998

eISSN :

1550-2368

Publisher :

American Physical Society, College Park, United States - Maryland

Volume :

Issue :

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 11 July 2012

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