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“School of Particles And Accelerator”

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Paper   IPM / Particles And Accelerator / 12847
School of Particles and Accelerator
  Title:   Determination of pion and kaon fragmentation functions including spin asymmetries data in a global analysis
  Author(s): 
1.  Maryam Soleymaninia
2.  Ali Naghi Khorramian
3.  Seyad Mohammad Moosavinejad
4.  Fatemeh Arbabifar
  Status:   Published
  Journal: Phys. Rev. D
  No.:  054019
  Vol.:  88,054019
  Year:  2013
  Pages:   1-19
  Supported by:  IPM
  Abstract:
We present new functional form of pion and kaon fragmentation functions up to next-to-leading order obtained through a global fit to single-inclusive electron-positron annihilation data and also employ, the semi-inclusive deep inelastic scattering asymmetry data from HERMES and COMPASS to determine FFs. In this analysis we consider the impression of semi-inclusive deep inelastic scat-tering asymmetry data on the fragmentation functions, where the produced hadrons of different electric charge are identified. We break symmetry assumption between quark and anti-quark frag- mentation functions for favored partons by using the asymmetry data. The results of our analysis are in good agreement with electron-positron annihilation data and also with all the semi-inclusive deep inelastic scattering asymmetry data. Also we apply the obtained fragmentation functions to predict the scaled-energy distribution of +/K+ inclusively produced in top-quark decays at next-to-leading order using the zero-mass variable-flavor-number scheme exploiting the universality and scaling violations of fragmentation functions.

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