Studies of transverse momentum dependent parton distributions and Bessel weighting

M. Aghasyan, H. Avakian, E. De Sanctis, L. Gamberg, M. Mirazita, B. Musch, A. Prokudin, P. Rossi

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Abstract

Abstract: In this paper we present a new technique for analysis of transverse momentum dependent parton distribution functions, based on the Bessel weighting formalism. The procedure is applied to studies of the double longitudinal spin asymmetry in semi-inclusive deep inelastic scattering using a new dedicated Monte Carlo generator which includes quark intrinsic transverse momentum within the generalized parton model. Using a fully differential cross section for the process, the effect of four momentum conservation is analyzed using various input models for transverse momentum distributions and fragmentation functions. We observe a few percent systematic offset of the Bessel-weighted asymmetry obtained from Monte Carlo extraction compared to input model calculations, which is due to the limitations imposed by the energy and momentum conservation at the given energy/Q2. We find that the Bessel weighting technique provides a powerful and reliable tool to study the Fourier transform of TMDs with controlled systematics due to experimental acceptances and resolutions with different TMD model inputs.

Original languageEnglish (US)
Article number39
Pages (from-to)1-30
Number of pages30
JournalJournal of High Energy Physics
Volume2015
Issue number3
DOIs
Publication statusPublished - Jan 1 2015

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Aghasyan, M., Avakian, H., De Sanctis, E., Gamberg, L., Mirazita, M., Musch, B., ... Rossi, P. (2015). Studies of transverse momentum dependent parton distributions and Bessel weighting. Journal of High Energy Physics, 2015(3), 1-30. [39]. https://doi.org/10.1007/JHEP03(2015)039