“School of Particles And Accelerator”

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Paper   IPM / Particles And Accelerator / 12304
School of Particles and Accelerator
  Title:   Helicity contributions of W+-Boson in energy distribution of B-hadron in Top quark decay
1.  Seyed Mohammad Moosavi Nejad
2.  ‎B‎. ‎A Kniehl
3.  G‎ Kramer
  Status:   In Proceedings
  Proceeding: The Conference in Honour of Murray Gell-Mann's 80th Birthday,2010
  Year:  2010
  Pages:   459-466
  Supported by:  IPM
We calculate the energy spectrum of the inclusive b-flavored hadrons in the decay of an unpolarized top quark into a bottom quark and a W+-boson at next-to-leading order (NLO). The helicity contributions of the W+-boson in the energy distribution of the B-hadron are determined. The helicities of the W+-boson are specified as longitudinal, transverse-plus and transverse-minus. In our calculation we apply the zero-mass variable-flavor-number scheme (ZM-VFNS) using realistic non-perturbative fragmentation functions obtained through a global fit to e+e data from CERN LEP1 and SLAC SLC.

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