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Studies of transverse momentum dependent parton distributions and Bessel weighting

  • Regular Article - Theoretical Physics
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  • Published: 09 March 2015
  • Volume 2015, article number 39, (2015)
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Journal of High Energy Physics Aims and scope Submit manuscript
Studies of transverse momentum dependent parton distributions and Bessel weighting
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  • M. Aghasyan1,2,
  • H. Avakian3,
  • E. De Sanctis1,
  • L. Gamberg4,
  • M. Mirazita1,
  • B. Musch5,
  • A. Prokudin3 &
  • …
  • P. Rossi1,3 

  • 413 Accesses

  • 6 Citations

  • 1 Altmetric

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A preprint version of the article is available at arXiv.

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/Q 2. 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.

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Authors and Affiliations

  1. INFN, Laboratori Nazionali di Frascati, 00044, Frascati, Italy

    M. Aghasyan, E. De Sanctis, M. Mirazita & P. Rossi

  2. Instituto Tecnológico da Aeronáutica, DCTA, 12228-900, São José dos Campos, SP, Brazil

    M. Aghasyan

  3. Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia, 23606, U.S.A.

    H. Avakian, A. Prokudin & P. Rossi

  4. Department of Physics, Penn State University-Berks, Reading, PA, 19610, U.S.A.

    L. Gamberg

  5. Institut für Theoretische Physik, Universität Regensburg, 93040, Regensburg, Germany

    B. Musch

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  1. M. Aghasyan
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Correspondence to L. Gamberg.

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ArXiv ePrint: 1409.0487

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Aghasyan, M., Avakian, H., De Sanctis, E. et al. Studies of transverse momentum dependent parton distributions and Bessel weighting. J. High Energ. Phys. 2015, 39 (2015). https://doi.org/10.1007/JHEP03(2015)039

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  • Received: 14 September 2014

  • Revised: 15 January 2015

  • Accepted: 17 February 2015

  • Published: 09 March 2015

  • DOI: https://doi.org/10.1007/JHEP03(2015)039

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Keywords

  • Deep Inelastic Scattering
  • Parton Model
  • QCD
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