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Improved extraction of valence transversity distributions from inclusive dihadron production

A preprint version of the article is available at arXiv.

Abstract

We present an updated extraction of the transversity parton distribution based on the analysis of pion-pair production in deep-inelastic scattering off transversely polarized targets in collinear factorization. Data for proton and deuteron targets make it possible to perform a flavor separation of the valence components of the transversity distribution, using di-hadron fragmentation functions taken from the semi-inclusive production of two pion pairs in back-to-back jets in e + e annihilation. The e + e data from Belle have been reanalyzed using the replica method and a more realistic estimate of the uncertainties on the chiral-odd interference fragmentation function has been obtained. Then, the transversity distribution has been extracted by using the most recent and more precise COMPASS data for deep-inelastic scattering off proton targets. Our results represent the most accurate estimate of the uncertainties on the valence components of the transversity distribution currently available.

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Correspondence to Marco Radici.

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ArXiv ePrint: 1503.03495

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Radici, M., Courtoy, A., Bacchetta, A. et al. Improved extraction of valence transversity distributions from inclusive dihadron production. J. High Energ. Phys. 2015, 123 (2015). https://doi.org/10.1007/JHEP05(2015)123

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Keywords

  • Deep Inelastic Scattering (Phenomenology)
  • QCD Phenomenology